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828990c2fc
Summary: This fixes PR 28933 by making sure GVNHoist does not try to recreate memory accesses when it has not actually moved them. Reviewers: sebpop Subscribers: llvm-commits, george.burgess.iv Differential Revision: https://reviews.llvm.org/D23411 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278401 91177308-0d34-0410-b5e6-96231b3b80d8
22 lines
838 B
LLVM
22 lines
838 B
LLVM
; RUN: opt -S -gvn-hoist -verify-memoryssa < %s | FileCheck %s
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; Check that we end up with one load and one store, in the right order
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; CHECK-LABEL: define void @test_it(
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; CHECK: store
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; CHECK-NEXT: load
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; CHECK-NOT: store
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; CHECK-NOT: load
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%rec894.0.1.2.3.12 = type { i16 }
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@a = external global %rec894.0.1.2.3.12
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define void @test_it() {
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bb2:
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store i16 undef, i16* getelementptr inbounds (%rec894.0.1.2.3.12, %rec894.0.1.2.3.12* @a, i16 0, i32 0), align 1
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%_tmp61 = load i16, i16* getelementptr inbounds (%rec894.0.1.2.3.12, %rec894.0.1.2.3.12* @a, i16 0, i32 0), align 1
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store i16 undef, i16* getelementptr inbounds (%rec894.0.1.2.3.12, %rec894.0.1.2.3.12* @a, i16 0, i32 0), align 1
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%_tmp92 = load i16, i16* getelementptr inbounds (%rec894.0.1.2.3.12, %rec894.0.1.2.3.12* @a, i16 0, i32 0), align 1
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ret void
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}
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