79435de8a5
Previously only fixed vector splats were handled. This adds supports for scalable vectors too by allowing ConstantExpr splats. We need to add the extra V->getType()->isVectorTy() check because a ConstantExpr might be a scalar to vector bitcast. By allowing ConstantExprs this also allow fixed vector ConstantExprs to be folded, which causes the diffs in llvm/test/Analysis/ValueTracking/known-bits-from-operator-constexpr.ll and llvm/test/Transforms/InstSimplify/ConstProp/cast-vector.ll. I can remove them from this PR if reviewers would prefer. Fixes #132922
33 lines
1.4 KiB
LLVM
33 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
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; Test constant fold of constant expression GEP used by ptrtoint (the
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; "offsetof-like expression" case).
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; This used to hit an assert due to not supporting vectors in
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; llvm::ConstantFoldCastInstruction when handling ptrtoint.
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define <2 x i16> @test1() {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret <2 x i16> <i16 ptrtoint (ptr getelementptr inbounds ([10 x i32], ptr null, i64 0, i64 5) to i16), i16 ptrtoint (ptr getelementptr inbounds ([10 x i32], ptr null, i64 0, i64 7) to i16)>
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;
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entry:
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%gep = getelementptr inbounds [10 x i32], ptr null, i16 0, <2 x i16> <i16 5, i16 7>
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%vec = ptrtoint <2 x ptr> %gep to <2 x i16>
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ret <2 x i16> %vec
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}
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; Test constant fold of constant expression GEP used by ptrtoint (the
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; "sizeof-like expression" case).
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; This used to hit an assert due to not supporting vectors in
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; llvm::ConstantFoldCastInstruction when handling ptrtoint.
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define <2 x i16> @test2() {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret <2 x i16> <i16 ptrtoint (ptr getelementptr (i32, ptr null, i64 5) to i16), i16 ptrtoint (ptr getelementptr (i32, ptr null, i64 7) to i16)>
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;
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entry:
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%gep = getelementptr i32, ptr null, <2 x i16> <i16 5, i16 7>
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%vec = ptrtoint <2 x ptr> %gep to <2 x i16>
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ret <2 x i16> %vec
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}
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