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48 lines
877 B
LLVM
48 lines
877 B
LLVM
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; RUN: opt -S -dse < %s | FileCheck %s
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declare void @llvm.memcpy.i8(i8*, i8*, i8, i32)
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declare void @llvm.memmove.i8(i8*, i8*, i8, i32)
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declare void @llvm.memset.i8(i8*, i8, i8, i32)
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define void @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 0, i8* %A ;; Written to by memcpy
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; CHECK-NOT: store
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call void @llvm.memcpy.i8(i8* %A, i8* %B, i8 -1, i32 0)
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ret void
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; CHECK: ret void
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}
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define void @test2() {
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; CHECK: @test2
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%A = alloca i8
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%B = alloca i8
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store i8 0, i8* %A ;; Written to by memmove
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; CHECK-NOT: store
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call void @llvm.memmove.i8(i8* %A, i8* %B, i8 -1, i32 0)
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ret void
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; CHECK: ret void
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}
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define void @test3() {
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; CHECK: @test3
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%A = alloca i8
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%B = alloca i8
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store i8 0, i8* %A ;; Written to by memset
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; CHECK-NOT: store
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call void @llvm.memset.i8(i8* %A, i8 0, i8 -1, i32 0)
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ret void
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; CHECK: ret void
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}
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