forked from OSchip/llvm-project
parent
ec411e9199
commit
91ea404e98
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@ -0,0 +1,17 @@
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; RUN: opt -S -gvn -dse < %s | FileCheck %s
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declare void @llvm.memcpy.i8(i8*, i8*, i8, i32)
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define i8 @test1() {
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; CHECK: @test1
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%A = alloca i8
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%B = alloca i8
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store i8 2, i8* %B ;; Not written to by memcpy
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call void @llvm.memcpy.i8(i8* %A, i8* %B, i8 -1, i32 0)
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%C = load i8* %B
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ret i8 %C
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; CHECK-NEXT: ret i8 2
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}
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; RUN: opt -S -gvn < %s | FileCheck %s
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declare void @llvm.memset.i8(i8*, i8, i8, i32)
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define i8 @test(i8* %P) {
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%P2 = getelementptr i8* %P, i32 1000
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store i8 1, i8* %P2 ;; Not dead across memset
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call void @llvm.memset.i8(i8* %P, i8 2, i8 127, i32 0)
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%A = load i8* %P2
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ret i8 %A
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; CHECK: ret i8 1
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}
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