Author: Yingwei Zheng Date: 2024-11-25T09:37:30+01:00 New Revision: f9ae37c670d4bcf4713278ac94d2c8991a326f9e
URL: https://github.com/llvm/llvm-project/commit/f9ae37c670d4bcf4713278ac94d2c8991a326f9e DIFF: https://github.com/llvm/llvm-project/commit/f9ae37c670d4bcf4713278ac94d2c8991a326f9e.diff LOG: [InstCombine] Handle constant GEP expr in `SimplifyDemandedUseBits` (#116794) Closes https://github.com/llvm/llvm-project/issues/116775. (cherry picked from commit 03d8831fa8ef5b7e32172c718b550a454645faea) Added: Modified: llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp llvm/test/Transforms/InstCombine/ptrmask.ll Removed: ################################################################################ diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp index 8a6ec3076ac621..b9d06b59368508 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp @@ -1004,7 +1004,7 @@ Value *InstCombinerImpl::SimplifyDemandedUseBits(Instruction *I, uint64_t MaskedGEPIndex = HighBitsGEPIndex | MaskedLowBitsGEPIndex; if (MaskedGEPIndex != GEPIndex) { - auto *GEP = cast<GetElementPtrInst>(II->getArgOperand(0)); + auto *GEP = cast<GEPOperator>(II->getArgOperand(0)); Builder.SetInsertPoint(I); Type *GEPIndexType = DL.getIndexType(GEP->getPointerOperand()->getType()); diff --git a/llvm/test/Transforms/InstCombine/ptrmask.ll b/llvm/test/Transforms/InstCombine/ptrmask.ll index 4631b81cd1ce1f..cd998bac3f9f0d 100644 --- a/llvm/test/Transforms/InstCombine/ptrmask.ll +++ b/llvm/test/Transforms/InstCombine/ptrmask.ll @@ -578,3 +578,16 @@ define ptr @ptrmask_is_useless_fail1(i64 %i, i64 %m) { %r = call ptr @llvm.ptrmask.p0.i64(ptr %p0, i64 %m0) ret ptr %r } + +@GC_arrays = external global { i8, i8, i64 } + +define ptr @ptrmask_demandedbits_constantexpr() { +; CHECK-LABEL: define ptr @ptrmask_demandedbits_constantexpr() { +; CHECK-NEXT: entry: +; CHECK-NEXT: [[ALIGNED_RESULT:%.*]] = call align 8 ptr @llvm.ptrmask.p0.i64(ptr nonnull @GC_arrays, i64 -8) +; CHECK-NEXT: ret ptr [[ALIGNED_RESULT]] +; +entry: + %aligned_result = call ptr @llvm.ptrmask.p0.i64(ptr getelementptr inbounds (i8, ptr @GC_arrays, i64 1), i64 -8) + ret ptr %aligned_result +} _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
