Sync

dataset.jsonl

@@ -209,6 +209,7 @@
 {"bug_id": "104761", "issue_url": "https://github.com/llvm/llvm-project/issues/104761", "bug_type": "crash", "base_commit": "5cfa8baef33636827e5aa8dd76888c724433b53e", "knowledge_cutoff": "2024-08-19T11:00:31Z", "lit_test_dir": ["llvm/test/Analysis/LoopCacheAnalysis"], "hints": {"fix_commit": "2e6deb1dd3a4422807633ba08773e8d786e43d4c", "components": ["LoopCacheAnalysis"], "bug_location_lineno": {"llvm/include/llvm/Analysis/LoopCacheAnalysis.h": [[16, 21], [31, 37], [192, 199]], "llvm/lib/Analysis/LoopCacheAnalysis.cpp": [[328, 333], [338, 351], [696, 702]]}, "bug_location_funcname": {"llvm/lib/Analysis/LoopCacheAnalysis.cpp": ["CacheCost::computeLoopCacheCost", "IndexedReference::computeRefCost", "IndexedReference::tryDelinearizeFixedSize"]}}, "patch": "commit 2e6deb1dd3a4422807633ba08773e8d786e43d4c\nAuthor: Sjoerd Meijer <[email protected]>\nDate:   Thu Nov 14 08:40:45 2024 +0000\n\n    [LoopInterchange] Fix overflow in cost calculation (#111807)\n    \n    If the iteration count is really large, e.g. UINT_MAX, then the cost\n    calculation can overflows and trigger an assert. So saturate the cost to\n    INT_MAX if this is the case by using InstructionCost as a type which\n    already supports this kind of overflow handling.\n    \n    This fixes #104761\n\ndiff --git a/llvm/include/llvm/Analysis/LoopCacheAnalysis.h b/llvm/include/llvm/Analysis/LoopCacheAnalysis.h\nindex 4fd2485e39d6..3e22487e5e34 100644\n--- a/llvm/include/llvm/Analysis/LoopCacheAnalysis.h\n+++ b/llvm/include/llvm/Analysis/LoopCacheAnalysis.h\n@@ -16,6 +16,7 @@\n \n #include \"llvm/Analysis/LoopAnalysisManager.h\"\n #include \"llvm/IR/PassManager.h\"\n+#include \"llvm/Support/InstructionCost.h\"\n #include <optional>\n \n namespace llvm {\n@@ -31,7 +32,7 @@ class ScalarEvolution;\n class SCEV;\n class TargetTransformInfo;\n \n-using CacheCostTy = int64_t;\n+using CacheCostTy = InstructionCost;\n using LoopVectorTy = SmallVector<Loop *, 8>;\n \n /// Represents a memory reference as a base pointer and a set of indexing\n@@ -192,8 +193,6 @@ class CacheCost {\n   using LoopCacheCostTy = std::pair<const Loop *, CacheCostTy>;\n \n public:\n-  static CacheCostTy constexpr InvalidCost = -1;\n-\n   /// Construct a CacheCost object for the loop nest described by \\p Loops.\n   /// The optional parameter \\p TRT can be used to specify the max. distance\n   /// between array elements accessed in a loop so that the elements are\ndiff --git a/llvm/lib/Analysis/LoopCacheAnalysis.cpp b/llvm/lib/Analysis/LoopCacheAnalysis.cpp\nindex 7ca9f15ad5fc..2897b922f61e 100644\n--- a/llvm/lib/Analysis/LoopCacheAnalysis.cpp\n+++ b/llvm/lib/Analysis/LoopCacheAnalysis.cpp\n@@ -328,6 +328,8 @@ CacheCostTy IndexedReference::computeRefCost(const Loop &L,\n       const SCEV *TripCount =\n           computeTripCount(*AR->getLoop(), *Sizes.back(), SE);\n       Type *WiderType = SE.getWiderType(RefCost->getType(), TripCount->getType());\n+      // For the multiplication result to fit, request a type twice as wide.\n+      WiderType = WiderType->getExtendedType();\n       RefCost = SE.getMulExpr(SE.getNoopOrZeroExtend(RefCost, WiderType),\n                               SE.getNoopOrZeroExtend(TripCount, WiderType));\n     }\n@@ -338,14 +340,18 @@ CacheCostTy IndexedReference::computeRefCost(const Loop &L,\n   assert(RefCost && \"Expecting a valid RefCost\");\n \n   // Attempt to fold RefCost into a constant.\n+  // CacheCostTy is a signed integer, but the tripcount value can be large\n+  // and may not fit, so saturate/limit the value to the maximum signed\n+  // integer value.\n   if (auto ConstantCost = dyn_cast<SCEVConstant>(RefCost))\n-    return ConstantCost->getValue()->getZExtValue();\n+    return ConstantCost->getValue()->getLimitedValue(\n+        std::numeric_limits<int64_t>::max());\n \n   LLVM_DEBUG(dbgs().indent(4)\n              << \"RefCost is not a constant! Setting to RefCost=InvalidCost \"\n                 \"(invalid value).\\n\");\n \n-  return CacheCost::InvalidCost;\n+  return CacheCostTy::getInvalid();\n }\n \n bool IndexedReference::tryDelinearizeFixedSize(\n@@ -696,7 +702,7 @@ CacheCostTy\n CacheCost::computeLoopCacheCost(const Loop &L,\n                                 const ReferenceGroupsTy &RefGroups) const {\n   if (!L.isLoopSimplifyForm())\n-    return InvalidCost;\n+    return CacheCostTy::getInvalid();\n \n   LLVM_DEBUG(dbgs() << \"Considering loop '\" << L.getName()\n                     << \"' as innermost loop.\\n\");\n", "tests": [{"file": "llvm/test/Analysis/LoopCacheAnalysis/interchange-refcost-overflow.ll", "commands": ["opt <  %s  -passes='print<loop-cache-cost>' -disable-output 2>&1"], "tests": [{"test_name": "foo", "test_body": "@A = external local_unnamed_addr global [11 x [11 x [11 x i32]]], align 16\n\ndefine void @foo(i32 noundef %b) {\nentry:\n  %0 = sext i32 %b to i64\n  br label %outer.loop\n\nouter.loop:                                       ; preds = %outer.loop.cleanup, %entry\n  %indvars.iv = phi i64 [ %indvars.iv.next, %outer.loop.cleanup ], [ 0, %entry ]\n  br label %inner.loop\n\nouter.loop.cleanup:                               ; preds = %inner.loop\n  %indvars.iv.next = add nsw i64 %indvars.iv, %0\n  br label %outer.loop\n\ninner.loop:                                       ; preds = %inner.loop, %outer.loop\n  %inner.iv = phi i64 [ 0, %outer.loop ], [ %add, %inner.loop ]\n  %arrayidx3 = getelementptr inbounds [11 x [11 x [11 x i32]]], ptr @A, i64 0, i64 %indvars.iv, i64 %inner.iv, i64 %inner.iv\n  store i32 0, ptr %arrayidx3, align 4\n  %add = add nuw i64 %inner.iv, 2\n  %cmp = icmp ult i64 %inner.iv, -5\n  br i1 %cmp, label %inner.loop, label %outer.loop.cleanup\n}\n"}]}], "issue": {"title": "[LoopInterchange]  Assertion `getActiveBits() <= 64 && \"Too many bits for uint64_t\"", "body": "With options \"-O3 --target=aarch64 func.cpp -mllvm -enable-loopinterchange\" and this input:\r\n```\r\nunsigned int A[11][11][11] __attribute__((aligned(16)));\r\nvoid a(int b) {\r\n  for (int c;; c += b)\r\n    for (long d = 0; d < -3ULL; d += 2ULL)\r\n      A[c][d][d] = 0;\r\n}\r\n```\r\n\r\nLoop-interchange runs in an assert:\r\n\r\n```\r\nllvm-project/llvm/include/llvm/ADT/APInt.h:1501: uint64_t llvm::APInt::getZExtValue() const: Assertion `getActiveBits() <= 64 && \"Too many bits for uint64_t\"' failed.\r\n```\r\n\r\nIR reproducer, compile this with \"opt -passes=loop-interchange -S\":\r\n\r\n```\r\ntarget datalayout = \"e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32\"\r\ntarget triple = \"aarch64-unknown-linux-gnu\"\r\n\r\n@A = local_unnamed_addr global [11 x [11 x [11 x i32]]] zeroinitializer, align 16\r\n\r\ndefine void @_Z1ai(i32 noundef %b) local_unnamed_addr #0 {\r\nentry:\r\n  %0 = sext i32 %b to i64\r\n  br label %for.cond\r\n\r\n; Loop:\r\nfor.cond:                                         ; preds = %for.cond.cleanup, %entry\r\n  %indvars.iv = phi i64 [ %indvars.iv.next, %for.cond.cleanup ], [ 0, %entry ]\r\n  br label %for.body\r\n\r\nfor.cond.cleanup:                                 ; preds = %for.body\r\n  %indvars.iv.next = add nsw i64 %indvars.iv, %0\r\n  br label %for.cond\r\n\r\nfor.body:                                         ; preds = %for.cond, %for.body\r\n  %d.010 = phi i64 [ 0, %for.cond ], [ %add, %for.body ]\r\n  %arrayidx3 = getelementptr inbounds [11 x [11 x [11 x i32]]], ptr @A, i64 0, i64 %indvars.iv, i64 %d.010, i64 %d.010\r\n  store i32 0, ptr %arrayidx3, align 4\r\n  %add = add nuw i64 %d.010, 2\r\n  %cmp = icmp ult i64 %d.010, -5\r\n  br i1 %cmp, label %for.body, label %for.cond.cleanup\r\n}\r\n```", "author": "sjoerdmeijer", "labels": ["crash-on-valid", "llvm:analysis"], "comments": [{"author": "RKSimon", "body": "```\r\nopt: /root/llvm-project/llvm/include/llvm/ADT/APInt.h:1501: uint64_t llvm::APInt::getZExtValue() const: Assertion `getActiveBits() <= 64 && \"Too many bits for uint64_t\"' failed.\r\nPLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.\r\nStack dump:\r\n0.\tProgram arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/opt -o /app/output.s -S -passes=loop-interchange -debug <source>\r\n1.\tRunning pass \"function(loop(loop-interchange))\" on module \"<source>\"\r\n2.\tRunning pass \"loop(loop-interchange)\" on function \"_Z1ai\"\r\n #0 0x0000000004f7f528 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4f7f528)\r\n #1 0x0000000004f7cc9c SignalHandler(int) Signals.cpp:0:0\r\n #2 0x00007f497b842520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)\r\n #3 0x00007f497b8969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)\r\n #4 0x00007f497b842476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)\r\n #5 0x00007f497b8287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)\r\n #6 0x00007f497b82871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)\r\n #7 0x00007f497b839e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)\r\n #8 0x00000000045677cc llvm::IndexedReference::computeRefCost(llvm::Loop const&, unsigned int) const (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x45677cc)\r\n #9 0x000000000456995f llvm::CacheCost::computeLoopCacheCost(llvm::Loop const&, llvm::SmallVector<llvm::SmallVector<std::unique_ptr<llvm::IndexedReference, std::default_delete<llvm::IndexedReference>>, 8u>, 8u> const&) const (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x456995f)\r\n#10 0x000000000456c137 llvm::CacheCost::calculateCacheFootprint() (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x456c137)\r\n#11 0x0000000004573d5c llvm::CacheCost::getCacheCost(llvm::Loop&, llvm::LoopStandardAnalysisResults&, llvm::DependenceInfo&, std::optional<unsigned int>) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4573d5c)\r\n#12 0x0000000003c71d66 llvm::LoopInterchangePass::run(llvm::LoopNest&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3c71d66)\r\n#13 0x0000000002eb0a6e llvm::detail::PassModel<llvm::LoopNest, llvm::LoopInterchangePass, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::run(llvm::LoopNest&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x2eb0a6e)\r\n#14 0x0000000003c85255 llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::runWithLoopNestPasses(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3c85255)\r\n#15 0x0000000003c85ce3 llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::run(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3c85ce3)\r\n#16 0x0000000003c868b8 llvm::FunctionToLoopPassAdaptor::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3c868b8)\r\n#17 0x0000000000df128e llvm::detail::PassModel<llvm::Function, llvm::FunctionToLoopPassAdaptor, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0xdf128e)\r\n#18 0x0000000004d7c368 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4d7c368)\r\n#19 0x0000000000df14be llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0xdf14be)\r\n#20 0x0000000004d7ad5e llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4d7ad5e)\r\n#21 0x0000000000df0f8e llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0xdf0f8e)\r\n#22 0x0000000004d78ec0 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4d78ec0)\r\n#23 0x00000000008e7582 llvm::runPassPipeline(llvm::StringRef, llvm::Module&, llvm::TargetMachine*, llvm::TargetLibraryInfoImpl*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::StringRef, llvm::ArrayRef<llvm::PassPlugin>, llvm::ArrayRef<std::function<void (llvm::PassBuilder&)>>, llvm::opt_tool::OutputKind, llvm::opt_tool::VerifierKind, bool, bool, bool, bool, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8e7582)\r\n#24 0x00000000008da45c optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8da45c)\r\n#25 0x00007f497b829d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)\r\n#26 0x00007f497b829e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)\r\n#27 0x00000000008d1eee _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8d1eee)\r\n```\r\nWhich seems to be due to the getZExtValue() call inside IndexedReference::computeRefCost\r\nhttps://github.com/llvm/llvm-project/blob/b05c55472bf7cadcd0e4cb1a669b3474695b0524/llvm/lib/Analysis/LoopCacheAnalysis.cpp#L340:L343"}, {"author": "svs-quic", "body": "cc: @caojoshua "}, {"author": "sjoerdmeijer", "body": "I have a fix, will put it up for review tomorrow. "}]}, "verified": true}
 {"bug_id": "114738", "issue_url": "https://github.com/llvm/llvm-project/issues/114738", "bug_type": "miscompilation", "base_commit": "2588b8be5624f721c56f44fd2a69f7327de8c0c1", "knowledge_cutoff": "2024-11-04T05:50:07Z", "lit_test_dir": ["llvm/test/Transforms/SLPVectorizer"], "hints": {"fix_commit": "899336735aeb2b41a48b6ac2c895da5e0f22dbf0", "components": ["SLPVectorizer"], "bug_location_lineno": {"llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp": [[19490, 19498]]}, "bug_location_funcname": {"llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp": ["tryToReduce"]}}, "patch": "commit 899336735aeb2b41a48b6ac2c895da5e0f22dbf0\nAuthor: Alexey Bataev <[email protected]>\nDate:   Mon Nov 4 06:02:06 2024 -0800\n\n    [SLP]Be more pessimistic about poisonous reductions\n    \n    Consider all possible reductions ops as being non-poisoning boolean\n    logical operations, which require freeze to be fully correct.\n    \n    https://alive2.llvm.org/ce/z/TKWDMP\n    \n    Fixes #114738\n\ndiff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp\nindex 427b8bd0e75a..3c6daf7b9fbb 100644\n--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp\n+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp\n@@ -19490,9 +19490,7 @@ public:\n         // To prevent poison from leaking across what used to be sequential,\n         // safe, scalar boolean logic operations, the reduction operand must be\n         // frozen.\n-        if ((isBoolLogicOp(RdxRootInst) ||\n-             (AnyBoolLogicOp && VL.size() != TrackedVals.size())) &&\n-            !isGuaranteedNotToBePoison(VectorizedRoot))\n+        if (AnyBoolLogicOp && !isGuaranteedNotToBePoison(VectorizedRoot))\n           VectorizedRoot = Builder.CreateFreeze(VectorizedRoot);\n \n         // Emit code to correctly handle reused reduced values, if required.\n", "tests": [{"file": "llvm/test/Transforms/SLPVectorizer/reudction-or-non-poisoned.ll", "commands": ["opt -S --passes=slp-vectorizer < %s"], "tests": [{"test_name": "test", "test_body": "define i1 @test(i32 %x, i32 %a, i32 %b, i32 %c, i32 %d) {\n  %cmp = icmp sgt i32 %x, 1\n  %cmp2 = icmp sgt i32 %b, 1\n  %cmp3 = icmp sgt i32 %c, 1\n  %cmp4 = icmp sgt i32 %d, 1\n  %sel2 = select i1 %cmp4, i1 true, i1 %cmp2\n  %sel3 = select i1 %sel2, i1 true, i1 %cmp3\n  %sel4 = select i1 %cmp, i1 true, i1 %cmp4\n  %ret = or i1 %sel3, %sel4\n  ret i1 %ret\n}\n"}]}], "issue": {"title": "[SLPVectorizer] wrong vectorization to `reduce_or` due to poisonous value", "body": "Alive2 report: https://alive2.llvm.org/ce/z/f8PDZj\r\n\r\n```llvm\r\n----------------------------------------\r\ndefine i1 @test1.2(i32 %x, i32 %a, i32 %b, i32 %c, i32 %d) {\r\n#0:\r\n  %cmp = icmp sgt i32 %x, 1\r\n  %cmp2 = icmp sgt i32 %b, 1\r\n  %cmp3 = icmp sgt i32 %c, 1\r\n  %cmp4 = icmp sgt i32 %d, 1\r\n  %sel2 = select i1 %cmp4, i1 1, i1 %cmp2\r\n  %sel3 = select i1 %sel2, i1 1, i1 %cmp3\r\n  %sel4 = select i1 %cmp, i1 1, i1 %cmp4\r\n  %ret = or i1 %sel3, %sel4\r\n  ret i1 %ret\r\n}\r\n=>\r\ndefine i1 @test1.2(i32 %x, i32 %a, i32 %b, i32 %c, i32 %d) {\r\n#0:\r\n  %#1 = insertelement <4 x i32> poison, i32 %d, i32 0\r\n  %#2 = insertelement <4 x i32> %#1, i32 %b, i32 1\r\n  %#3 = insertelement <4 x i32> %#2, i32 %c, i32 2\r\n  %#4 = insertelement <4 x i32> %#3, i32 %x, i32 3\r\n  %#5 = icmp sgt <4 x i32> %#4, { 1, 1, 1, 1 }\r\n  %#6 = reduce_or <4 x i1> %#5\r\n  ret i1 %#6\r\n}\r\nTransformation doesn't verify!\r\n\r\nERROR: Target is more poisonous than source\r\n\r\nExample:\r\ni32 %x = #x00000000 (0)\r\ni32 %a = poison\r\ni32 %b = #x00000002 (2)\r\ni32 %c = poison\r\ni32 %d = #x00000000 (0)\r\n\r\nSource:\r\ni1 %cmp = #x0 (0)\r\ni1 %cmp2 = #x1 (1)\r\ni1 %cmp3 = poison\r\ni1 %cmp4 = #x0 (0)\r\ni1 %sel2 = #x1 (1)\r\ni1 %sel3 = #x1 (1)\r\ni1 %sel4 = #x0 (0)\r\ni1 %ret = #x1 (1)\r\n\r\nTarget:\r\n<4 x i32> %#1 = < #x00000000 (0), poison, poison, poison >\r\n<4 x i32> %#2 = < #x00000000 (0), #x00000002 (2), poison, poison >\r\n<4 x i32> %#3 = < #x00000000 (0), #x00000002 (2), poison, poison >\r\n<4 x i32> %#4 = < #x00000000 (0), #x00000002 (2), poison, #x00000000 (0) >\r\n<4 x i1> %#5 = < #x0 (0), #x1 (1), poison, #x0 (0) >\r\ni1 %#6 = poison\r\nSource value: #x1 (1)\r\nTarget value: poison\r\n\r\nSummary:\r\n  0 correct transformations\r\n  1 incorrect transformations\r\n  0 failed-to-prove transformations\r\n  0 Alive2 errors\r\n```", "author": "bongjunj", "labels": ["miscompilation", "llvm:SLPVectorizer"], "comments": []}, "verified": true}
 {"bug_id": "118030", "issue_url": "https://github.com/llvm/llvm-project/issues/118030", "bug_type": "crash", "base_commit": "6f4b4f41ca41d7d0b44a32d9968aef7667c68184", "knowledge_cutoff": "2024-11-28T19:14:48Z", "lit_test_dir": ["llvm/test/Transforms/SLPVectorizer"], "hints": {"fix_commit": "f4974e09312afc9549fcfc0304b738d235da9eca", "components": ["SLPVectorizer"], "bug_location_lineno": {"llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp": [[17799, 17804]]}, "bug_location_funcname": {"llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp": ["BoUpSLP::collectValuesToDemote"]}}, "patch": "commit f4974e09312afc9549fcfc0304b738d235da9eca\nAuthor: Alexey Bataev <[email protected]>\nDate:   Fri Nov 29 06:20:19 2024 -0800\n\n    [SLP] Add a check for poison value in AShrChecker\n    \n    Need to check if the value in AShrChecker is a poison before casting it\n    to instruction to avoid compiler crash\n    \n    Fixes #118030\n\ndiff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp\nindex 48a8520a966f..7723442bc0fb 100644\n--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp\n+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp\n@@ -17799,6 +17799,8 @@ bool BoUpSLP::collectValuesToDemote(\n     // original type and the sign bit of the truncate type are similar.\n     auto AShrChecker = [&](unsigned BitWidth, unsigned OrigBitWidth) {\n       return all_of(E.Scalars, [&](Value *V) {\n+        if (isa<PoisonValue>(V))\n+          return true;\n         auto *I = cast<Instruction>(V);\n         KnownBits AmtKnownBits = computeKnownBits(I->getOperand(1), *DL);\n         unsigned ShiftedBits = OrigBitWidth - BitWidth;\n", "tests": [{"file": "llvm/test/Transforms/SLPVectorizer/X86/ashr-node-with-poison.ll", "commands": ["opt -S --passes=slp-vectorizer -mtriple=x86_64-unknown-linux < %s"], "tests": [{"test_name": "<module>", "test_body": "\ndefine i32 @test(ptr %n, i32 %conv57, i1 %tobool5.not, i64 %bf.load14) {\n;\nentry:\n  br i1 false, label %entry.if.end54_crit_edge, label %while.cond\n\nentry.if.end54_crit_edge:\n  br label %if.end54\n\ntthread-pre-split:\n  br label %t\n\nt:\n  %w.2 = phi i32 [ 1, %tthread-pre-split ], [ 0, %if.end83 ]\n  br label %if.end7\n\nt.u_crit_edge:\n  br label %if.end7\n\nif.end7:\n  %w.4 = phi i32 [ %w.2, %t ], [ %w.2, %t.u_crit_edge ], [ %bf.cast25, %while.body ]\n  %a.4 = phi i32 [ 0, %t ], [ %conv57, %t.u_crit_edge ], [ %bf.cast2910, %while.body ]\n  %b.4 = phi i32 [ 0, %t ], [ 0, %t.u_crit_edge ], [ %bf.cast2910, %while.body ]\n  %c.4 = phi i32 [ 0, %t ], [ 1, %t.u_crit_edge ], [ poison, %while.body ]\n  br label %v\n\nwhile.cond:\n  %bf.load66.pre.pre1135 = phi i64 [ 0, %entry ], [ %spec.select, %if.end42 ]\n  br i1 %tobool5.not, label %if.end54, label %while.body\n\nwhile.body:\n  %bf.ashr24 = ashr i64 %bf.load14, 33\n  %bf.cast25 = trunc nsw i64 %bf.ashr24 to i32\n  %bf.ashr28 = lshr i64 %bf.load14, 1\n  %bf.cast2910 = trunc i64 %bf.ashr28 to i32\n  br label %if.end7\n\nif.end36:\n  br label %v\n\nv:\n  %c.7 = phi i32 [ %c.4, %if.end7 ], [ 0, %if.end36 ]\n  br i1 true, label %if.end42, label %v.if.end83_crit_edge\n\nv.if.end83_crit_edge:\n  br label %if.end83\n\nif.end42:\n  %tobool43.not = icmp eq i32 %b.4, 0\n  %narrow = select i1 %tobool43.not, i32 0, i32 %w.4\n  %spec.select = zext i32 %narrow to i64\n  %bf.value48 = zext i32 %a.4 to i64\n  store i64 %bf.value48, ptr %n, align 8\n  store i32 %c.7, ptr %n, align 4\n  br label %while.cond\n\nif.end54:\n  %bf.load66.pre.pre113125 = phi i64 [ %bf.load66.pre.pre1135, %while.cond ], [ poison, %entry.if.end54_crit_edge ]\n  %0 = icmp eq i64 %bf.load66.pre.pre113125, 0\n  br i1 %0, label %if.end83, label %ai.if.end76_crit_edge\n\nai.if.end76_crit_edge:\n  br label %if.end83\n\nif.end83:\n  br label %t\n}"}]}], "issue": {"title": "clang crashes on valid code at -O{s,2,3} on x86_64-linux-gnu: Assertion `isa<To>(Val) && \"cast<Ty>() argument of incompatible type!\"' failed", "body": "It appears to be a recent regression as it doesn't reproduce with 19.1.0 and earlier.\n\nCompiler Explorer: https://godbolt.org/z/cb67rEodY\n\n```\n[516] % clangtk -v\nclang version 20.0.0git (https://github.com/llvm/llvm-project.git 5208bc3694473f9378fc0d98eeee63e5ad5c5f04)\nTarget: x86_64-unknown-linux-gnu\nThread model: posix\nInstalledDir: /local/home/suz/suz-local/software/local/clang-trunk/bin\nBuild config: +assertions\nFound candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11\nFound candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/12\nSelected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/12\nCandidate multilib: .;@m64\nSelected multilib: .;@m64\nFound CUDA installation: /usr/local/cuda, version 11.8\n[517] % \n[517] % clangtk -O2 -w small.c\nclang-20: /local/suz-local/software/clangbuild/llvm-project/llvm/include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From*) [with To = llvm::Instruction; From = llvm::Value]: Assertion `isa<To>(Val) && \"cast<Ty>() argument of incompatible type!\"' failed.\nPLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.\nStack dump:\n0.\tProgram arguments: /local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -dumpdir a- -disable-free -clear-ast-before-backend -main-file-name small.c -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/local/suz-local/software/emitesting/bugs/20241125-clangtk-m64-O3-fpointer-tbaa-build-014338/delta -fcoverage-compilation-dir=/local/suz-local/software/emitesting/bugs/20241125-clangtk-m64-O3-fpointer-tbaa-build-014338/delta -resource-dir /local/home/suz/suz-local/software/local/clang-trunk/lib/clang/20 -I /usr/local/include -I /local/suz-local/software/local/include -internal-isystem /local/home/suz/suz-local/software/local/clang-trunk/lib/clang/20/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -w -ferror-limit 19 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcolor-diagnostics -vectorize-loops -vectorize-slp -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/small-99895f.o -x c small.c\n1.\t<eof> parser at end of file\n2.\tOptimizer\n3.\tRunning pass \"function<eager-inv>(float2int,lower-constant-intrinsics,loop(loop-rotate<header-duplication;no-prepare-for-lto>,loop-deletion),loop-distribute,inject-tli-mappings,loop-vectorize<no-interleave-forced-only;no-vectorize-forced-only;>,infer-alignment,loop-load-elim,instcombine<max-iterations=1;no-verify-fixpoint>,simplifycfg<bonus-inst-threshold=1;forward-switch-cond;switch-range-to-icmp;switch-to-lookup;no-keep-loops;hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,slp-vectorizer,vector-combine,instcombine<max-iterations=1;no-verify-fixpoint>,loop-unroll<O2>,transform-warning,sroa<preserve-cfg>,infer-alignment,instcombine<max-iterations=1;no-verify-fixpoint>,loop-mssa(licm<allowspeculation>),alignment-from-assumptions,loop-sink,instsimplify,div-rem-pairs,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;no-hoist-common-insts;hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;speculate-unpredictables>)\" on module \"small.c\"\n4.\tRunning pass \"slp-vectorizer\" on function \"main\"\n #0 0x0000562e34749b50 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x455db50)\n #1 0x0000562e34746f5f llvm::sys::RunSignalHandlers() (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x455af5f)\n #2 0x0000562e347470b5 SignalHandler(int) Signals.cpp:0:0\n #3 0x00007f99ac5bf520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)\n #4 0x00007f99ac613a7c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x96a7c)\n #5 0x00007f99ac5bf476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)\n #6 0x00007f99ac5a57f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)\n #7 0x00007f99ac5a571b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)\n #8 0x00007f99ac5b6e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)\n #9 0x0000562e31712868 (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x1526868)\n#10 0x0000562e3616cf4e llvm::slpvectorizer::BoUpSLP::collectValuesToDemote(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, unsigned int&, llvm::SmallVectorImpl<unsigned int>&, llvm::DenseSet<llvm::slpvectorizer::BoUpSLP::TreeEntry const*, llvm::DenseMapInfo<llvm::slpvectorizer::BoUpSLP::TreeEntry const*, void>>&, unsigned int&, bool&, bool) const::'lambda9'(unsigned int, unsigned int)::operator()(unsigned int, unsigned int) const::'lambda'(llvm::Value*)::operator()(llvm::Value*) const SLPVectorizer.cpp:0:0\n#11 0x0000562e3616d208 bool llvm::function_ref<bool (unsigned int, unsigned int)>::callback_fn<llvm::slpvectorizer::BoUpSLP::collectValuesToDemote(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, unsigned int&, llvm::SmallVectorImpl<unsigned int>&, llvm::DenseSet<llvm::slpvectorizer::BoUpSLP::TreeEntry const*, llvm::DenseMapInfo<llvm::slpvectorizer::BoUpSLP::TreeEntry const*, void>>&, unsigned int&, bool&, bool) const::'lambda9'(unsigned int, unsigned int)>(long, unsigned int, unsigned int) SLPVectorizer.cpp:0:0\n#12 0x0000562e361c72e9 llvm::slpvectorizer::BoUpSLP::collectValuesToDemote(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, unsigned int&, llvm::SmallVectorImpl<unsigned int>&, llvm::DenseSet<llvm::slpvectorizer::BoUpSLP::TreeEntry const*, llvm::DenseMapInfo<llvm::slpvectorizer::BoUpSLP::TreeEntry const*, void>>&, unsigned int&, bool&, bool) const::'lambda6'(unsigned int&, llvm::ArrayRef<llvm::slpvectorizer::BoUpSLP::TreeEntry const*>, llvm::function_ref<bool (unsigned int, unsigned int)>)::operator()(unsigned int&, llvm::ArrayRef<llvm::slpvectorizer::BoUpSLP::TreeEntry const*>, llvm::function_ref<bool (unsigned int, unsigned int)>) const SLPVectorizer.cpp:0:0\n#13 0x0000562e361c6065 llvm::slpvectorizer::BoUpSLP::collectValuesToDemote(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, unsigned int&, llvm::SmallVectorImpl<unsigned int>&, llvm::DenseSet<llvm::slpvectorizer::BoUpSLP::TreeEntry const*, llvm::DenseMapInfo<llvm::slpvectorizer::BoUpSLP::TreeEntry const*, void>>&, unsigned int&, bool&, bool) const (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x5fda065)\n#14 0x0000562e361c6d09 llvm::slpvectorizer::BoUpSLP::computeMinimumValueSizes()::'lambda0'(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, bool, unsigned int, unsigned int, bool, bool)::operator()(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, bool, unsigned int, unsigned int, bool, bool) const SLPVectorizer.cpp:0:0\n#15 0x0000562e361db4e3 llvm::slpvectorizer::BoUpSLP::computeMinimumValueSizes() (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x5fef4e3)\n#16 0x0000562e3623dc1e llvm::SLPVectorizerPass::tryToVectorizeList(llvm::ArrayRef<llvm::Value*>, llvm::slpvectorizer::BoUpSLP&, bool) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x6051c1e)\n#17 0x0000562e362427c0 bool tryToVectorizeSequence<llvm::Value>(llvm::SmallVectorImpl<llvm::Value*>&, llvm::function_ref<bool (llvm::Value*, llvm::Value*)>, llvm::function_ref<bool (llvm::Value*, llvm::Value*)>, llvm::function_ref<bool (llvm::ArrayRef<llvm::Value*>, bool)>, bool, llvm::slpvectorizer::BoUpSLP&) (.constprop.0) SLPVectorizer.cpp:0:0\n#18 0x0000562e36244162 llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x6058162)\n#19 0x0000562e3624bc96 llvm::SLPVectorizerPass::runImpl(llvm::Function&, llvm::ScalarEvolution*, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo*, llvm::AAResults*, llvm::LoopInfo*, llvm::DominatorTree*, llvm::AssumptionCache*, llvm::DemandedBits*, llvm::OptimizationRemarkEmitter*) (.part.0) SLPVectorizer.cpp:0:0\n#20 0x0000562e3624c802 llvm::SLPVectorizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x6060802)\n#21 0x0000562e35c92cf6 llvm::detail::PassModel<llvm::Function, llvm::SLPVectorizerPass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x5aa6cf6)\n#22 0x0000562e340cd78f llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x3ee178f)\n#23 0x0000562e31add026 llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x18f1026)\n#24 0x0000562e340cbb1b llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x3edfb1b)\n#25 0x0000562e31adb986 llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x18ef986)\n#26 0x0000562e340cc67d llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x3ee067d)\n#27 0x0000562e349f1d16 (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>&, std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) BackendUtil.cpp:0:0\n#28 0x0000562e349f566c clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x480966c)\n#29 0x0000562e350be425 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x4ed2425)\n#30 0x0000562e36cf2c7c clang::ParseAST(clang::Sema&, bool, bool) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x6b06c7c)\n#31 0x0000562e3539f2c9 clang::FrontendAction::Execute() (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x51b32c9)\n#32 0x0000562e353190f5 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x512d0f5)\n#33 0x0000562e354836b3 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x52976b3)\n#34 0x0000562e316862d1 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x149a2d1)\n#35 0x0000562e3167cc8a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0\n#36 0x0000562e31681067 clang_main(int, char**, llvm::ToolContext const&) (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x1495067)\n#37 0x0000562e31579a7b main (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x138da7b)\n#38 0x00007f99ac5a6d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)\n#39 0x00007f99ac5a6e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)\n#40 0x0000562e3167c3b5 _start (/local/home/suz/suz-local/software/local/clang-trunk/bin/clang-20+0x14903b5)\nclangtk: error: unable to execute command: Aborted\nclangtk: error: clang frontend command failed due to signal (use -v to see invocation)\nclang version 20.0.0git (https://github.com/llvm/llvm-project.git 5208bc3694473f9378fc0d98eeee63e5ad5c5f04)\nTarget: x86_64-unknown-linux-gnu\nThread model: posix\nInstalledDir: /local/home/suz/suz-local/software/local/clang-trunk/bin\nBuild config: +assertions\nclangtk: note: diagnostic msg: \n********************\n\nPLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:\nPreprocessed source(s) and associated run script(s) are located at:\nclangtk: note: diagnostic msg: /tmp/small-522eca.c\nclangtk: note: diagnostic msg: /tmp/small-522eca.sh\nclangtk: note: diagnostic msg: \n\n********************\n[518] % \n[518] % cat small.c\nstruct {\n  int b : 31;\n  int c : 6;\n} f, g, j;\nint d, e, h, i, k, l, m, n, o;\nint main() {\n  if (m) {\n    short q = d;\n    if (d)\n    r:\n      d = q;\n    if (0) {\n    s:\n    t:\n      if (h)\n      u:\n        o = g.c;\n      if (n)\n        goto v;\n    }\n    if (n)\n      while (g.c) {\n        if (e)\n          k;\n        int w = j.b, a, b = g.c, c = ~b;\n        a = f.b;\n        if (l) {\n          c = 0 % 0;\n          goto u;\n        }\n        if (a)\n          goto s;\n        l;\n      v:\n        if (i)\n          goto ae;\n        if (b)\n          j.b = w;\n        f.b = a;\n        l = c;\n      }\n    short p = n;\n    if (0) {\n    ag:\n      h = p;\n      if (f.b)\n        goto t;\n    }\n    if (j.b) {\n    ae:\n      e = 0;\n    ai:\n      if (q)\n        goto r;\n    }\n  }\n  if (j.b)\n    goto ai;\n  if (d)\n    goto ag;\n  return 0;\n}\n```", "author": "zhendongsu", "labels": ["llvm:SLPVectorizer", "crash"], "comments": []}, "verified": true}
+{"bug_id": "135182", "issue_url": "https://github.com/llvm/llvm-project/issues/135182", "bug_type": "miscompilation", "base_commit": "77db154cf9383fa20685fca56633601ce0ea47fa", "knowledge_cutoff": "2025-04-10T13:51:31Z", "lit_test_dir": ["llvm/test/Transforms/IndVarSimplify"], "hints": {"fix_commit": "d14acb78065bdd331019924feaaef52e5e744529", "components": ["SimplifyIndVar"], "bug_location_lineno": {"llvm/lib/Transforms/Utils/SimplifyIndVar.cpp": [[1743, 1748]]}, "bug_location_funcname": {"llvm/lib/Transforms/Utils/SimplifyIndVar.cpp": ["WidenIV::widenWithVariantUse"]}}, "patch": "commit d14acb78065bdd331019924feaaef52e5e744529\nAuthor: Yingwei Zheng <[email protected]>\nDate:   Fri Apr 11 09:03:06 2025 +0800\n\n    [IndVarSimplify] Handle the case where both operands are the same when widening IV (#135207)\n    \n    `WidenIV::widenWithVariantUse` assumes that exactly one of the binop\n    operands is the IV to be widened. This miscompilation happens when it\n    tries to sign-extend the \"NonIV\" operand while the IV is zero-extended.\n    Closes https://github.com/llvm/llvm-project/issues/135182.\n\ndiff --git a/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp b/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp\nindex 7b9c5c77cbe9..5a76bec01765 100644\n--- a/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp\n+++ b/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp\n@@ -1743,6 +1743,9 @@ bool WidenIV::widenWithVariantUse(WidenIV::NarrowIVDefUse DU) {\n     // TODO: Support case for NarrowDef = NarrowUse->getOperand(1).\n     if (NarrowUse->getOperand(0) != NarrowDef)\n       return false;\n+    // We cannot use a different extend kind for the same operand.\n+    if (NarrowUse->getOperand(1) == NarrowDef)\n+      return false;\n     if (!SE->isKnownNegative(RHS))\n       return false;\n     bool ProvedSubNUW = SE->isKnownPredicateAt(ICmpInst::ICMP_UGE, LHS,\n", "tests": [{"file": "llvm/test/Transforms/IndVarSimplify/pr135182.ll", "commands": ["opt -S -passes=indvars < %s"], "tests": [{"test_name": "pr135182", "test_body": "target datalayout = \"e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128\"\n\ndefine i32 @pr135182() {\nentry:\n  br label %for.body\n\nfor.body:                                         ; preds = %for.body, %entry\n  %indvar = phi i16 [ -12, %entry ], [ %indvar.next, %for.body ]\n  %add = add i16 %indvar, %indvar\n  %ext = zext i16 %add to i32\n  %indvar.next = add i16 %indvar, 1\n  br i1 false, label %for.body, label %for.end\n\nfor.end:                                          ; preds = %for.body\n  ret i32 %ext\n}\n"}]}], "issue": {"title": "[IndVarSimplify] Miscompilation at -O3", "body": "Reproducer: https://alive2.llvm.org/ce/z/fvxiS3\n```\n; bin/opt -passes=indvars test.ll -S\ntarget datalayout = \"e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128\"\ntarget triple = \"x86_64-unknown-linux-gnu\"\n\ndefine void @src(ptr %p) {\nentry:\n  br label %for.body21\n\nfor.body21:\n  %storemerge629 = phi i8 [ -12, %entry ], [ %dec, %for.body21 ]\n  %conv29 = sext i8 %storemerge629 to i16\n  %conv1.i = sext i8 %storemerge629 to i16\n  %add.i = add i16 %conv29, %conv1.i\n  %conv55 = zext i16 %add.i to i32\n  store i32 %conv55, ptr %p, align 4\n  %dec = add i8 %storemerge629, 1\n  br i1 false, label %for.body21, label %for.end234\n\nfor.end234:\n  ret void\n}\n```\nOutput:\n```\ndefine void @tgt(ptr %p) {\n  br label %for.body21\n\nfor.body21:                                       ; preds = %for.body21, %entry\n  store i32 131048, ptr %p, align 4\n  br i1 false, label %for.body21, label %for.end234\n\nfor.end234:                                       ; preds = %for.body21\n  ret void\n}\n```\n`store i32 131048, ptr @g_150, align 4` should be `store i32 65512, ptr @g_150, align 4`\nllvm version: f819f46284f2a79790038e1f6649172789734ae8\n", "author": "dtcxzyw", "labels": ["miscompilation", "llvm:transforms"], "comments": []}, "verified": true}
 {"bug_id": "106626", "issue_url": "https://github.com/llvm/llvm-project/issues/106626", "bug_type": "crash", "base_commit": "e51fc36c385d756ccbc2be8c47c52af207c3aead", "knowledge_cutoff": "2024-08-29T20:51:42Z", "lit_test_dir": ["llvm/test/Transforms/SLPVectorizer"], "hints": {"fix_commit": "cc943a67d114e28c28f561c3b1a48ff2003264ce", "components": ["SLPVectorizer"], "bug_location_lineno": {"llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp": [[3237, 3251]]}, "bug_location_funcname": {"llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp": ["findLaneForValue"]}}, "patch": "commit cc943a67d114e28c28f561c3b1a48ff2003264ce\nAuthor: Alexey Bataev <[email protected]>\nDate:   Thu Aug 29 15:05:09 2024 -0700\n\n    [SLP]Fix PR106626: trye several attempts for lookup values, if not found.\n    \n    If the value is used in Scalar several times, the first attempt to find\n    its position in the node (if ReuseShuffleIndices and ReorderIndices not\n    empty) may fail. In this case need to find another copy of the same\n    value and try again.\n    Fixes https://github.com/llvm/llvm-project/issues/106626\n\ndiff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp\nindex 775fa9ba75cf..edb2567fa057 100644\n--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp\n+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp\n@@ -3237,15 +3237,25 @@ private:\n     /// When ReuseReorderShuffleIndices is empty it just returns position of \\p\n     /// V within vector of Scalars. Otherwise, try to remap on its reuse index.\n     int findLaneForValue(Value *V) const {\n-      unsigned FoundLane = std::distance(Scalars.begin(), find(Scalars, V));\n-      assert(FoundLane < Scalars.size() && \"Couldn't find extract lane\");\n-      if (!ReorderIndices.empty())\n-        FoundLane = ReorderIndices[FoundLane];\n-      assert(FoundLane < Scalars.size() && \"Couldn't find extract lane\");\n-      if (!ReuseShuffleIndices.empty()) {\n-        FoundLane = std::distance(ReuseShuffleIndices.begin(),\n-                                  find(ReuseShuffleIndices, FoundLane));\n+      unsigned FoundLane = getVectorFactor();\n+      for (auto *It = find(Scalars, V), *End = Scalars.end(); It != End;\n+           std::advance(It, 1)) {\n+        if (*It != V)\n+          continue;\n+        FoundLane = std::distance(Scalars.begin(), It);\n+        assert(FoundLane < Scalars.size() && \"Couldn't find extract lane\");\n+        if (!ReorderIndices.empty())\n+          FoundLane = ReorderIndices[FoundLane];\n+        assert(FoundLane < Scalars.size() && \"Couldn't find extract lane\");\n+        if (ReuseShuffleIndices.empty())\n+          break;\n+        if (auto *RIt = find(ReuseShuffleIndices, FoundLane);\n+            RIt != ReuseShuffleIndices.end()) {\n+          FoundLane = std::distance(ReuseShuffleIndices.begin(), RIt);\n+          break;\n+        }\n       }\n+      assert(FoundLane < getVectorFactor() && \"Unable to find given value.\");\n       return FoundLane;\n     }\n \n", "tests": [{"file": "llvm/test/Transforms/SLPVectorizer/AArch64/reused-scalar-repeated-in-node.ll", "commands": ["opt -S --passes=slp-vectorizer -mtriple=aarch64-unknown-linux-gnu < %s"], "tests": [{"test_name": "test", "test_body": "define void @test() {\nentry:\n  br label %bb61\n\nbb61:                                             ; preds = %entry\n  br label %bb64\n\nbb62:                                             ; No predecessors!\n  br i1 poison, label %bb63, label %bb64\n\nbb63:                                             ; preds = %bb62\n  br label %bb64\n\nbb64:                                             ; preds = %bb63, %bb62, %bb61\n  %i = phi nsz float [ poison, %bb61 ], [ poison, %bb63 ], [ poison, %bb62 ]\n  %i65 = phi nsz float [ poison, %bb61 ], [ poison, %bb63 ], [ poison, %bb62 ]\n  %i66 = load float, ptr poison, align 16\n  %i67 = load float, ptr poison, align 4\n  %i68 = load float, ptr poison, align 8\n  %i69 = load float, ptr poison, align 4\n  %i70 = load float, ptr poison, align 4\n  %i71 = load float, ptr poison, align 16\n  %i72 = load float, ptr poison, align 4\n  %i73 = load float, ptr poison, align 8\n  %i74 = load float, ptr poison, align 4\n  %i75 = load float, ptr poison, align 16\n  %i76 = load float, ptr poison, align 4\n  br i1 poison, label %bb167, label %bb77\n\nbb77:                                             ; preds = %bb64\n  br label %bb78\n\nbb78:                                             ; preds = %bb78, %bb77\n  %i79 = phi nsz float [ %i66, %bb77 ], [ %i103, %bb78 ]\n  %i80 = phi nsz float [ %i67, %bb77 ], [ %i104, %bb78 ]\n  %i81 = phi nsz float [ %i68, %bb77 ], [ %i105, %bb78 ]\n  %i82 = phi nsz float [ poison, %bb77 ], [ %i106, %bb78 ]\n  %i83 = phi nsz float [ poison, %bb77 ], [ %i123, %bb78 ]\n  %i84 = phi nsz float [ %i69, %bb77 ], [ %i124, %bb78 ]\n  %i85 = phi nsz float [ poison, %bb77 ], [ %i125, %bb78 ]\n  %i86 = phi nsz float [ %i70, %bb77 ], [ %i126, %bb78 ]\n  %i87 = fmul fast float %i79, poison\n  %i88 = fmul fast float %i80, poison\n  %i89 = fmul fast float %i81, poison\n  %i90 = fmul fast float %i82, poison\n  %i91 = fmul fast float %i83, poison\n  %i92 = fadd fast float %i91, %i87\n  %i93 = fmul fast float %i84, poison\n  %i94 = fadd fast float %i93, %i88\n  %i95 = fmul fast float %i85, poison\n  %i96 = fadd fast float %i95, %i89\n  %i97 = fmul fast float %i86, poison\n  %i98 = fadd fast float %i97, %i90\n  %i99 = fadd fast float %i92, poison\n  %i100 = fadd fast float %i94, poison\n  %i101 = fadd fast float %i96, poison\n  %i102 = fadd fast float %i98, poison\n  %i103 = fadd fast float %i99, poison\n  %i104 = fadd fast float %i100, poison\n  %i105 = fadd fast float %i101, poison\n  %i106 = fadd fast float %i102, poison\n  %i107 = fmul fast float %i79, poison\n  %i108 = fmul fast float %i80, poison\n  %i109 = fmul fast float %i81, poison\n  %i110 = fmul fast float %i82, poison\n  %i111 = fmul fast float %i83, poison\n  %i112 = fadd fast float %i111, %i107\n  %i113 = fmul fast float %i84, poison\n  %i114 = fadd fast float %i113, %i108\n  %i115 = fmul fast float %i85, poison\n  %i116 = fadd fast float %i115, %i109\n  %i117 = fmul fast float %i86, poison\n  %i118 = fadd fast float %i117, %i110\n  %i119 = fadd fast float %i112, poison\n  %i120 = fadd fast float %i114, poison\n  %i121 = fadd fast float %i116, poison\n  %i122 = fadd fast float %i118, poison\n  %i123 = fadd fast float %i119, poison\n  %i124 = fadd fast float %i120, poison\n  %i125 = fadd fast float %i121, poison\n  %i126 = fadd fast float %i122, poison\n  %i127 = fmul fast float %i79, %i\n  %i128 = fmul fast float %i80, %i\n  %i129 = fmul fast float %i81, %i\n  %i130 = fmul fast float %i82, %i\n  %i131 = fmul fast float %i83, %i65\n  %i132 = fadd fast float %i131, %i127\n  %i133 = fmul fast float %i84, %i65\n  %i134 = fadd fast float %i133, %i128\n  %i135 = fmul fast float %i85, %i65\n  %i136 = fadd fast float %i135, %i129\n  %i137 = fmul fast float %i86, %i65\n  %i138 = fadd fast float %i137, %i130\n  %i139 = fadd fast float %i132, poison\n  %i140 = fadd fast float %i134, poison\n  %i141 = fadd fast float %i136, poison\n  %i142 = fadd fast float %i138, poison\n  %i143 = fadd fast float %i139, poison\n  %i144 = fadd fast float %i140, poison\n  %i145 = fadd fast float %i141, poison\n  %i146 = fadd fast float %i142, poison\n  %i147 = fmul fast float %i79, poison\n  %i148 = fmul fast float %i80, poison\n  %i149 = fmul fast float %i81, poison\n  %i150 = fmul fast float %i82, poison\n  %i151 = fmul fast float %i83, poison\n  %i152 = fadd fast float %i151, %i147\n  %i153 = fmul fast float %i84, poison\n  %i154 = fadd fast float %i153, %i148\n  %i155 = fmul fast float %i85, poison\n  %i156 = fadd fast float %i155, %i149\n  %i157 = fmul fast float %i86, poison\n  %i158 = fadd fast float %i157, %i150\n  %i159 = fadd fast float %i152, poison\n  %i160 = fadd fast float %i154, poison\n  %i161 = fadd fast float %i156, poison\n  %i162 = fadd fast float %i158, poison\n  %i163 = fadd fast float %i159, poison\n  %i164 = fadd fast float %i160, poison\n  %i165 = fadd fast float %i161, poison\n  %i166 = fadd fast float %i162, poison\n  br i1 poison, label %bb78, label %bb167\n\nbb167:                                            ; preds = %bb78, %bb64\n  %i168 = phi nsz float [ %i76, %bb64 ], [ %i166, %bb78 ]\n  %i169 = phi nsz float [ poison, %bb64 ], [ %i165, %bb78 ]\n  %i170 = phi nsz float [ poison, %bb64 ], [ %i164, %bb78 ]\n  %i171 = phi nsz float [ %i75, %bb64 ], [ %i163, %bb78 ]\n  %i172 = phi nsz float [ %i74, %bb64 ], [ %i146, %bb78 ]\n  %i173 = phi nsz float [ %i73, %bb64 ], [ %i145, %bb78 ]\n  %i174 = phi nsz float [ %i72, %bb64 ], [ %i144, %bb78 ]\n  %i175 = phi nsz float [ %i71, %bb64 ], [ %i143, %bb78 ]\n  %i176 = phi nsz float [ %i70, %bb64 ], [ %i126, %bb78 ]\n  %i177 = phi nsz float [ poison, %bb64 ], [ %i125, %bb78 ]\n  %i178 = phi nsz float [ %i69, %bb64 ], [ %i124, %bb78 ]\n  %i179 = phi nsz float [ poison, %bb64 ], [ %i123, %bb78 ]\n  %i180 = phi nsz float [ poison, %bb64 ], [ %i106, %bb78 ]\n  %i181 = phi nsz float [ %i68, %bb64 ], [ %i105, %bb78 ]\n  %i182 = phi nsz float [ %i67, %bb64 ], [ %i104, %bb78 ]\n  %i183 = phi nsz float [ %i66, %bb64 ], [ %i103, %bb78 ]\n  store float %i182, ptr poison, align 1\n  store float %i174, ptr poison, align 1\n  br i1 poison, label %bb186, label %bb184\n\nbb184:                                            ; preds = %bb167\n  br label %bb185\n\nbb185:                                            ; preds = %bb185, %bb184\n  br i1 poison, label %bb185, label %bb186\n\nbb186:                                            ; preds = %bb185, %bb167\n  %i187 = phi nsz float [ %i178, %bb167 ], [ poison, %bb185 ]\n  ret void\n}\n"}]}], "issue": {"title": "[SLP] Assertion \"All elements in mask must be less than CommonVF.\" failed", "body": "[PR77529](https://github.com/llvm/llvm-project/pull/77529) trigger assertion on \"All elements in mask must be less than CommonVF.\" failed.\r\n\r\n@alexey-bataev \r\n\r\nTo reproduce, run with: opt -S -passes=slp-vectorizer t.ll -o o.ll\r\nUsing reduced t.ll below\r\n```\r\ntarget datalayout = \"e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32\"\r\ntarget triple = \"aarch64-unknown-linux-gnu\"\r\n\r\ndefine void @test() {\r\nentry:\r\n  br label %bb61\r\n\r\nbb61:\r\n  br label %bb64\r\n\r\nbb62:\r\n  br i1 poison, label %bb63, label %bb64\r\n\r\nbb63:\r\n  br label %bb64\r\n\r\nbb64:\r\n  %i = phi nsz float [ poison, %bb61 ], [ poison, %bb63 ], [ poison, %bb62 ]\r\n  %i65 = phi nsz float [ poison, %bb61 ], [ poison, %bb63 ], [ poison, %bb62 ]\r\n  %i66 = load float, ptr poison, align 16\r\n  %i67 = load float, ptr poison, align 4\r\n  %i68 = load float, ptr poison, align 8\r\n  %i69 = load float, ptr poison, align 4\r\n  %i70 = load float, ptr poison, align 4\r\n  %i71 = load float, ptr poison, align 16\r\n  %i72 = load float, ptr poison, align 4\r\n  %i73 = load float, ptr poison, align 8\r\n  %i74 = load float, ptr poison, align 4\r\n  %i75 = load float, ptr poison, align 16\r\n  %i76 = load float, ptr poison, align 4\r\n  br i1 poison, label %bb167, label %bb77\r\n\r\nbb77:                                             ; preds = %bb64\r\n  br label %bb78\r\n\r\nbb78:                                             ; preds = %bb78, %bb77\r\n  %i79 = phi nsz float [ %i66, %bb77 ], [ %i103, %bb78 ]\r\n  %i80 = phi nsz float [ %i67, %bb77 ], [ %i104, %bb78 ]\r\n  %i81 = phi nsz float [ %i68, %bb77 ], [ %i105, %bb78 ]\r\n  %i82 = phi nsz float [ poison, %bb77 ], [ %i106, %bb78 ]\r\n  %i83 = phi nsz float [ poison, %bb77 ], [ %i123, %bb78 ]\r\n  %i84 = phi nsz float [ %i69, %bb77 ], [ %i124, %bb78 ]\r\n  %i85 = phi nsz float [ poison, %bb77 ], [ %i125, %bb78 ]\r\n  %i86 = phi nsz float [ %i70, %bb77 ], [ %i126, %bb78 ]\r\n  %i87 = fmul fast float %i79, poison\r\n  %i88 = fmul fast float %i80, poison\r\n  %i89 = fmul fast float %i81, poison\r\n  %i90 = fmul fast float %i82, poison\r\n  %i91 = fmul fast float %i83, poison\r\n  %i92 = fadd fast float %i91, %i87\r\n  %i93 = fmul fast float %i84, poison\r\n  %i94 = fadd fast float %i93, %i88\r\n  %i95 = fmul fast float %i85, poison\r\n  %i96 = fadd fast float %i95, %i89\r\n  %i97 = fmul fast float %i86, poison\r\n  %i98 = fadd fast float %i97, %i90\r\n  %i99 = fadd fast float %i92, poison\r\n  %i100 = fadd fast float %i94, poison\r\n  %i101 = fadd fast float %i96, poison\r\n  %i102 = fadd fast float %i98, poison\r\n  %i103 = fadd fast float %i99, poison\r\n  %i104 = fadd fast float %i100, poison\r\n  %i105 = fadd fast float %i101, poison\r\n  %i106 = fadd fast float %i102, poison\r\n  %i107 = fmul fast float %i79, poison\r\n  %i108 = fmul fast float %i80, poison\r\n  %i109 = fmul fast float %i81, poison\r\n  %i110 = fmul fast float %i82, poison\r\n  %i111 = fmul fast float %i83, poison\r\n  %i112 = fadd fast float %i111, %i107\r\n  %i113 = fmul fast float %i84, poison\r\n  %i114 = fadd fast float %i113, %i108\r\n  %i115 = fmul fast float %i85, poison\r\n  %i116 = fadd fast float %i115, %i109\r\n  %i117 = fmul fast float %i86, poison\r\n  %i118 = fadd fast float %i117, %i110\r\n  %i119 = fadd fast float %i112, poison\r\n  %i120 = fadd fast float %i114, poison\r\n  %i121 = fadd fast float %i116, poison\r\n  %i122 = fadd fast float %i118, poison\r\n  %i123 = fadd fast float %i119, poison\r\n  %i124 = fadd fast float %i120, poison\r\n  %i125 = fadd fast float %i121, poison\r\n  %i126 = fadd fast float %i122, poison\r\n  %i127 = fmul fast float %i79, %i\r\n  %i128 = fmul fast float %i80, %i\r\n  %i129 = fmul fast float %i81, %i\r\n  %i130 = fmul fast float %i82, %i\r\n  %i131 = fmul fast float %i83, %i65\r\n  %i132 = fadd fast float %i131, %i127\r\n  %i133 = fmul fast float %i84, %i65\r\n  %i134 = fadd fast float %i133, %i128\r\n  %i135 = fmul fast float %i85, %i65\r\n  %i136 = fadd fast float %i135, %i129\r\n  %i137 = fmul fast float %i86, %i65\r\n  %i138 = fadd fast float %i137, %i130\r\n  %i139 = fadd fast float %i132, poison\r\n  %i140 = fadd fast float %i134, poison\r\n  %i141 = fadd fast float %i136, poison\r\n  %i142 = fadd fast float %i138, poison\r\n  %i143 = fadd fast float %i139, poison\r\n  %i144 = fadd fast float %i140, poison\r\n  %i145 = fadd fast float %i141, poison\r\n  %i146 = fadd fast float %i142, poison\r\n  %i147 = fmul fast float %i79, poison\r\n  %i148 = fmul fast float %i80, poison\r\n  %i149 = fmul fast float %i81, poison\r\n  %i150 = fmul fast float %i82, poison\r\n  %i151 = fmul fast float %i83, poison\r\n  %i152 = fadd fast float %i151, %i147\r\n  %i153 = fmul fast float %i84, poison\r\n  %i154 = fadd fast float %i153, %i148\r\n  %i155 = fmul fast float %i85, poison\r\n  %i156 = fadd fast float %i155, %i149\r\n  %i157 = fmul fast float %i86, poison\r\n  %i158 = fadd fast float %i157, %i150\r\n  %i159 = fadd fast float %i152, poison\r\n  %i160 = fadd fast float %i154, poison\r\n  %i161 = fadd fast float %i156, poison\r\n  %i162 = fadd fast float %i158, poison\r\n  %i163 = fadd fast float %i159, poison\r\n  %i164 = fadd fast float %i160, poison\r\n  %i165 = fadd fast float %i161, poison\r\n  %i166 = fadd fast float %i162, poison\r\n  br i1 poison, label %bb78, label %bb167\r\n\r\nbb167:                                            ; preds = %bb78, %bb64\r\n  %i168 = phi nsz float [ %i76, %bb64 ], [ %i166, %bb78 ]\r\n  %i169 = phi nsz float [ poison, %bb64 ], [ %i165, %bb78 ]\r\n  %i170 = phi nsz float [ poison, %bb64 ], [ %i164, %bb78 ]\r\n  %i171 = phi nsz float [ %i75, %bb64 ], [ %i163, %bb78 ]\r\n  %i172 = phi nsz float [ %i74, %bb64 ], [ %i146, %bb78 ]\r\n  %i173 = phi nsz float [ %i73, %bb64 ], [ %i145, %bb78 ]\r\n  %i174 = phi nsz float [ %i72, %bb64 ], [ %i144, %bb78 ]\r\n  %i175 = phi nsz float [ %i71, %bb64 ], [ %i143, %bb78 ]\r\n  %i176 = phi nsz float [ %i70, %bb64 ], [ %i126, %bb78 ]\r\n  %i177 = phi nsz float [ poison, %bb64 ], [ %i125, %bb78 ]\r\n  %i178 = phi nsz float [ %i69, %bb64 ], [ %i124, %bb78 ]\r\n  %i179 = phi nsz float [ poison, %bb64 ], [ %i123, %bb78 ]\r\n  %i180 = phi nsz float [ poison, %bb64 ], [ %i106, %bb78 ]\r\n  %i181 = phi nsz float [ %i68, %bb64 ], [ %i105, %bb78 ]\r\n  %i182 = phi nsz float [ %i67, %bb64 ], [ %i104, %bb78 ]\r\n  %i183 = phi nsz float [ %i66, %bb64 ], [ %i103, %bb78 ]\r\n  store float %i182, ptr poison, align 1\r\n  store float %i174, ptr poison, align 1\r\n  br i1 poison, label %bb186, label %bb184\r\n\r\nbb184:                                            ; preds = %bb167\r\n  br label %bb185\r\n\r\nbb185:                                            ; preds = %bb185, %bb184\r\n  br i1 poison, label %bb185, label %bb186\r\n\r\nbb186:                                            ; preds = %bb185, %bb167\r\n  %i187 = phi nsz float [ %i178, %bb167 ], [ poison, %bb185 ]\r\n  ret void\r\n}\r\n```", "author": "huihzhang", "labels": ["llvm:SLPVectorizer", "crash"], "comments": []}, "verified": true}
 {"bug_id": "77064", "issue_url": "https://github.com/llvm/llvm-project/issues/77064", "bug_type": "crash", "base_commit": "255f95a40377677dd762df5a1aa65bcbb4f75c79", "knowledge_cutoff": "2024-01-05T09:28:42Z", "lit_test_dir": ["llvm/test/Transforms/InstCombine"], "hints": {"fix_commit": "a001e9718fd974859f2797a9f9ed7bf87d364e4f", "components": ["SimplifyLibCalls"], "bug_location_lineno": {"llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp": [[3735, 3760]]}, "bug_location_funcname": {"llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp": ["LibCallSimplifier::optimizeCall"]}}, "patch": "commit a001e9718fd974859f2797a9f9ed7bf87d364e4f\nAuthor: Nikita Popov <[email protected]>\nDate:   Fri Jan 5 10:41:44 2024 +0100\n\n    [SimplifyLibCalls] Don't try to manually reprocess calls\n    \n    The current code for reprocessing the result of fortified libcall\n    simplifications is not correct, because we might simplify to an\n    argument of the original call, and if that is again a libcall,\n    mistakenly think that this is actually the simplification result.\n    \n    Instead of trying to fix this, simply remove the code entirely,\n    because InstCombine nowadays correctly handles reprocessing of\n    SimplifyLibCall results.\n    \n    Fixes https://github.com/llvm/llvm-project/issues/77064.\n\ndiff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp\nindex 760a626c8b6f..a7cd68e860e4 100644\n--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp\n+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp\n@@ -3735,26 +3735,8 @@ Value *LibCallSimplifier::optimizeCall(CallInst *CI, IRBuilderBase &Builder) {\n \n   // Also try to simplify calls to fortified library functions.\n   if (Value *SimplifiedFortifiedCI =\n-          FortifiedSimplifier.optimizeCall(CI, Builder)) {\n-    // Try to further simplify the result.\n-    CallInst *SimplifiedCI = dyn_cast<CallInst>(SimplifiedFortifiedCI);\n-    if (SimplifiedCI && SimplifiedCI->getCalledFunction()) {\n-      // Ensure that SimplifiedCI's uses are complete, since some calls have\n-      // their uses analyzed.\n-      replaceAllUsesWith(CI, SimplifiedCI);\n-\n-      // Set insertion point to SimplifiedCI to guarantee we reach all uses\n-      // we might replace later on.\n-      IRBuilderBase::InsertPointGuard Guard(Builder);\n-      Builder.SetInsertPoint(SimplifiedCI);\n-      if (Value *V = optimizeStringMemoryLibCall(SimplifiedCI, Builder)) {\n-        // If we were able to further simplify, remove the now redundant call.\n-        substituteInParent(SimplifiedCI, V);\n-        return V;\n-      }\n-    }\n+          FortifiedSimplifier.optimizeCall(CI, Builder))\n     return SimplifiedFortifiedCI;\n-  }\n \n   // Then check for known library functions.\n   if (TLI->getLibFunc(*Callee, Func) && isLibFuncEmittable(M, TLI, Func)) {\n", "tests": [{"file": "llvm/test/Transforms/InstCombine/pr77064.ll", "commands": ["opt -S -passes=instcombine < %s"], "tests": [{"test_name": "main", "test_body": "define void @main(ptr %ptr) {\n  %opendir = call fastcc ptr @opendir(ptr %ptr)\n  %memset = call ptr @__memset_chk(ptr %opendir, i32 0, i64 596, i64 -1)\n  ret void\n}\n\ndeclare ptr @__memset_chk(ptr, i32, i64, i64)\n\ndeclare fastcc ptr @opendir(ptr)\n"}]}], "issue": {"title": "[SimplifyLibCalls] Calling convention assertion fails", "body": "```llvm\r\n; RUN: opt -S -passes=instcombine\r\ndefine void @main(ptr %ptr) {\r\n  %opendir = call fastcc ptr @opendir(ptr %ptr)\r\n  %memset = call ptr @__memset_chk(ptr %opendir, i32 0, i64 596, i64 -1)\r\n  ret void\r\n}\r\n\r\ndeclare ptr @__memset_chk(ptr, i32, i64, i64)\r\n\r\ndeclare fastcc ptr @opendir(ptr)\r\n```\r\n\r\n> opt: /home/npopov/repos/llvm-project/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp:3488: Value *llvm::LibCallSimplifier::optimizeStringMemoryLibCall(CallInst *, IRBuilderBase &): Assertion `(ignoreCallingConv(Func) || TargetLibraryInfoImpl::isCallingConvCCompatible(CI)) && \"Optimizing string/memory libcall would change the calling convention\"' failed.\r\n\r\nEncountered when building openjpeg2.", "author": "nikic", "labels": ["llvm:crash", "llvm:instcombine"], "comments": []}, "verified": true}
 {"bug_id": "93298", "issue_url": "https://github.com/llvm/llvm-project/issues/93298", "bug_type": "crash", "base_commit": "f31b197d9df141effd439de8be51ce24f3e8f200", "knowledge_cutoff": "2024-05-24T12:01:44Z", "lit_test_dir": ["llvm/test/Transforms/DeadStoreElimination"], "hints": {"fix_commit": "243ffbdf8b25285d04ee4393e86094312cb7c64f", "components": ["DeadStoreElimination"], "bug_location_lineno": {"llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp": [[2109, 2118]]}, "bug_location_funcname": {"llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp": ["eliminateRedundantStoresOfExistingValues"]}}, "patch": "commit 243ffbdf8b25285d04ee4393e86094312cb7c64f\nAuthor: eaeltsin <[email protected]>\nDate:   Mon May 27 09:26:44 2024 +0200\n\n    [DSE] Check write location in IsRedundantStore (#93400)\n    \n    Fix https://github.com/llvm/llvm-project/issues/93298.\n\ndiff --git a/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp b/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp\nindex ed4212d29cef..172cce2cfa38 100644\n--- a/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp\n+++ b/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp\n@@ -2109,10 +2109,12 @@ struct DSEState {\n         if (auto *MemSetI = dyn_cast<MemSetInst>(UpperInst)) {\n           if (auto *SI = dyn_cast<StoreInst>(DefInst)) {\n             // MemSetInst must have a write location.\n-            MemoryLocation UpperLoc = *getLocForWrite(UpperInst);\n+            auto UpperLoc = getLocForWrite(UpperInst);\n+            if (!UpperLoc)\n+              return false;\n             int64_t InstWriteOffset = 0;\n             int64_t DepWriteOffset = 0;\n-            auto OR = isOverwrite(UpperInst, DefInst, UpperLoc, *MaybeDefLoc,\n+            auto OR = isOverwrite(UpperInst, DefInst, *UpperLoc, *MaybeDefLoc,\n                                   InstWriteOffset, DepWriteOffset);\n             Value *StoredByte = isBytewiseValue(SI->getValueOperand(), DL);\n             return StoredByte && StoredByte == MemSetI->getOperand(1) &&\n", "tests": [{"file": "llvm/test/Transforms/DeadStoreElimination/simple.ll", "commands": ["opt < %s -passes=dse -S", "opt < %s -aa-pipeline=basic-aa -passes=dse -S"], "tests": [{"test_name": "test48", "test_body": "target datalayout = \"E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128\"\n\ndefine i32 @test48(ptr %P, ptr noalias %Q, ptr %R) {\n  store i32 1, ptr %Q, align 4\n  store i32 2, ptr %P, align 4\n  store i32 3, ptr %Q, align 4\n  %l = load i32, ptr %R, align 4\n  ret i32 %l\n}\n"}, {"test_name": "test49", "test_body": "target datalayout = \"E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128\"\n\n; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)\ndeclare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0\n\ndefine void @test49() {\nbb:\n  call void @llvm.memset.p0.i64(ptr readonly null, i8 0, i64 0, i1 false)\n  store ptr null, ptr null, align 8\n  ret void\n}\n\nattributes #0 = { nocallback nofree nounwind willreturn memory(argmem: write) }\n"}]}], "issue": {"title": "[DSE] crash on applying * to std::nullopt", "body": "[reduced5.zip](https://github.com/llvm/llvm-project/files/15433764/reduced5.zip)\r\n\r\nThe command\r\n```\r\nopt -passes=dse reduced5.ll\r\n```\r\nfails occasionally. Debug version reliably complains\r\n```\r\ninclude/c++/v1/optional:805: assertion this->has_value() failed: optional operator* called on a disengaged value\r\n```\r\nwith stack trace\r\n```\r\n    frame #3: 0x00005555663c6a43 opt`std::__u::optional<llvm::MemoryLocation>::operator*(this= Has Value=false ) && at optional:805:5\r\n    frame #4: 0x00005555663c4d58 opt`(anonymous namespace)::DSEState::eliminateRedundantStoresOfExistingValues(this=0x00007fffffff9130)::'lambda'()::operator()() const at DeadStoreElimination.cpp:2119:39\r\n    frame #5: 0x00005555663bf842 opt`(anonymous namespace)::DSEState::eliminateRedundantStoresOfExistingValues(this=0x00007fffffff9960) at DeadStoreElimination.cpp:2132:12\r\n    frame #6: 0x00005555663b8956 opt`(anonymous namespace)::eliminateDeadStores(F=0x000033187fe3e008, AA=0x000033187feaafc8, MSSA=0x000033187fe603f0, DT=0x000033187fef6d78, PDT=0x000033187fed18d0, TLI=0x000033187fe0cd18, LI=0x000033187fe11cc8) at DeadStoreElimination.cpp:2332:23\r\n    frame #7: 0x00005555663b6b3e opt`llvm::DSEPass::run(this=0x000033187fe08ad8, F=0x000033187fe3e008, AM=0x00007fffffffc1d8) at DeadStoreElimination.cpp:2355:18\r\n```\r\n\r\nThe local fix is\r\n```\r\n==== llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp#184\r\n# action=edit type=text\r\n--- llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp\t2024-04-15 20:27:56.000000000 -0700\r\n+++ llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp\t2024-05-24 04:36:17.000000000 -0700\r\n@@ -2109,10 +2109,12 @@\r\n         if (auto *MemSetI = dyn_cast<MemSetInst>(UpperInst)) {\r\n           if (auto *SI = dyn_cast<StoreInst>(DefInst)) {\r\n             // MemSetInst must have a write location.\r\n-            MemoryLocation UpperLoc = *getLocForWrite(UpperInst);\r\n+            auto UpperLoc = getLocForWrite(UpperInst);\r\n+            if (!UpperLoc)\r\n+              return false;\r\n             int64_t InstWriteOffset = 0;\r\n             int64_t DepWriteOffset = 0;\r\n-            auto OR = isOverwrite(UpperInst, DefInst, UpperLoc, *MaybeDefLoc,\r\n+            auto OR = isOverwrite(UpperInst, DefInst, *UpperLoc, *MaybeDefLoc,\r\n                                   InstWriteOffset, DepWriteOffset);\r\n             Value *StoredByte = isBytewiseValue(SI->getValueOperand(), DL);\r\n             return StoredByte && StoredByte == MemSetI->getOperand(1) &&\r\n```\r\nwhich basically reverts a piece of https://github.com/llvm/llvm-project/commit/81d69e1bda9e4b6a83f29ba1f614e43ab4700972\r\n\r\nLooks like the actual problem happened earlier?\r\n\r\nPlease take a look, this is blocking us significantly.\r\n\r\n", "author": "eaeltsin", "labels": ["crash", "llvm:transforms"], "comments": [{"author": "eaeltsin", "body": "@nikic @fhahn FYI\r\n\r\nthe reproducer was cooked by @alinas \r\n"}]}, "verified": true}

dataset/135182.json

@@ -0,0 +1,55 @@
+{
+  "bug_id": "135182",
+  "issue_url": "https://github.com/llvm/llvm-project/issues/135182",
+  "bug_type": "miscompilation",
+  "base_commit": "77db154cf9383fa20685fca56633601ce0ea47fa",
+  "knowledge_cutoff": "2025-04-10T13:51:31Z",
+  "lit_test_dir": [
+    "llvm/test/Transforms/IndVarSimplify"
+  ],
+  "hints": {
+    "fix_commit": "d14acb78065bdd331019924feaaef52e5e744529",
+    "components": [
+      "SimplifyIndVar"
+    ],
+    "bug_location_lineno": {
+      "llvm/lib/Transforms/Utils/SimplifyIndVar.cpp": [
+        [
+          1743,
+          1748
+        ]
+      ]
+    },
+    "bug_location_funcname": {
+      "llvm/lib/Transforms/Utils/SimplifyIndVar.cpp": [
+        "WidenIV::widenWithVariantUse"
+      ]
+    }
+  },
+  "patch": "commit d14acb78065bdd331019924feaaef52e5e744529\nAuthor: Yingwei Zheng <[email protected]>\nDate:   Fri Apr 11 09:03:06 2025 +0800\n\n    [IndVarSimplify] Handle the case where both operands are the same when widening IV (#135207)\n    \n    `WidenIV::widenWithVariantUse` assumes that exactly one of the binop\n    operands is the IV to be widened. This miscompilation happens when it\n    tries to sign-extend the \"NonIV\" operand while the IV is zero-extended.\n    Closes https://github.com/llvm/llvm-project/issues/135182.\n\ndiff --git a/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp b/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp\nindex 7b9c5c77cbe9..5a76bec01765 100644\n--- a/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp\n+++ b/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp\n@@ -1743,6 +1743,9 @@ bool WidenIV::widenWithVariantUse(WidenIV::NarrowIVDefUse DU) {\n     // TODO: Support case for NarrowDef = NarrowUse->getOperand(1).\n     if (NarrowUse->getOperand(0) != NarrowDef)\n       return false;\n+    // We cannot use a different extend kind for the same operand.\n+    if (NarrowUse->getOperand(1) == NarrowDef)\n+      return false;\n     if (!SE->isKnownNegative(RHS))\n       return false;\n     bool ProvedSubNUW = SE->isKnownPredicateAt(ICmpInst::ICMP_UGE, LHS,\n",
+  "tests": [
+    {
+      "file": "llvm/test/Transforms/IndVarSimplify/pr135182.ll",
+      "commands": [
+        "opt -S -passes=indvars < %s"
+      ],
+      "tests": [
+        {
+          "test_name": "pr135182",
+          "test_body": "target datalayout = \"e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128\"\n\ndefine i32 @pr135182() {\nentry:\n  br label %for.body\n\nfor.body:                                         ; preds = %for.body, %entry\n  %indvar = phi i16 [ -12, %entry ], [ %indvar.next, %for.body ]\n  %add = add i16 %indvar, %indvar\n  %ext = zext i16 %add to i32\n  %indvar.next = add i16 %indvar, 1\n  br i1 false, label %for.body, label %for.end\n\nfor.end:                                          ; preds = %for.body\n  ret i32 %ext\n}\n"
+        }
+      ]
+    }
+  ],
+  "issue": {
+    "title": "[IndVarSimplify] Miscompilation at -O3",
+    "body": "Reproducer: https://alive2.llvm.org/ce/z/fvxiS3\n```\n; bin/opt -passes=indvars test.ll -S\ntarget datalayout = \"e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128\"\ntarget triple = \"x86_64-unknown-linux-gnu\"\n\ndefine void @src(ptr %p) {\nentry:\n  br label %for.body21\n\nfor.body21:\n  %storemerge629 = phi i8 [ -12, %entry ], [ %dec, %for.body21 ]\n  %conv29 = sext i8 %storemerge629 to i16\n  %conv1.i = sext i8 %storemerge629 to i16\n  %add.i = add i16 %conv29, %conv1.i\n  %conv55 = zext i16 %add.i to i32\n  store i32 %conv55, ptr %p, align 4\n  %dec = add i8 %storemerge629, 1\n  br i1 false, label %for.body21, label %for.end234\n\nfor.end234:\n  ret void\n}\n```\nOutput:\n```\ndefine void @tgt(ptr %p) {\n  br label %for.body21\n\nfor.body21:                                       ; preds = %for.body21, %entry\n  store i32 131048, ptr %p, align 4\n  br i1 false, label %for.body21, label %for.end234\n\nfor.end234:                                       ; preds = %for.body21\n  ret void\n}\n```\n`store i32 131048, ptr @g_150, align 4` should be `store i32 65512, ptr @g_150, align 4`\nllvm version: f819f46284f2a79790038e1f6649172789734ae8\n",
+    "author": "dtcxzyw",
+    "labels": [
+      "miscompilation",
+      "llvm:transforms"
+    ],
+    "comments": []
+  },
+  "verified": true
+}

scripts/extract_from_issues.py

@@ -34,7 +34,7 @@ session.headers.update(
 )
 
 issue_id_begin = 76663  # Since 2024-01-01
-issue_id_end = 134530
+issue_id_end = 135289
 
 
 def wait(progress):

scripts/postfix_extract.py

@@ -129,6 +129,7 @@ fix_commit_map = {
     "130632": None,  # Reverts #108535
     "131355": None,  # Non-deterministic bug
     "134411": None,  # Reverted
+    "135113": None,  # Not supported by Alive2
 }
 
 if issue_id in fix_commit_map: