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c2d93c4048
If both instructions to be replaced are marked invariant the resulting instruction is invariant. rdar://13358910 Fix by Erik Eckstein! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211801 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
754 B
LLVM
31 lines
754 B
LLVM
; RUN: opt -basicaa -gvn -S < %s | FileCheck %s
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define i32 @test1(i32* nocapture %p, i8* nocapture %q) {
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; CHECK-LABEL: test1
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; CHECK: %x = load i32* %p, align 4, !invariant.load !0
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; CHECK-NOT: %y = load
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entry:
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%x = load i32* %p, align 4, !invariant.load !0
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%conv = trunc i32 %x to i8
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store i8 %conv, i8* %q, align 1
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%y = load i32* %p, align 4, !invariant.load !0
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%add = add i32 %y, 1
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ret i32 %add
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}
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define i32 @test2(i32* nocapture %p, i8* nocapture %q) {
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; CHECK-LABEL: test2
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; CHECK-NOT: !invariant.load
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; CHECK-NOT: %y = load
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entry:
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%x = load i32* %p, align 4
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%conv = trunc i32 %x to i8
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store i8 %conv, i8* %q, align 1
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%y = load i32* %p, align 4, !invariant.load !0
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%add = add i32 %y, 1
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ret i32 %add
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}
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!0 = metadata !{ }
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