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; RUN: opt -S -dse < %s | FileCheck %s
declare void @llvm.memcpy.p0i8.p0i8.i8(i8* nocapture, i8* nocapture, i8, i32, i1) nounwind
declare void @llvm.memmove.p0i8.p0i8.i8(i8* nocapture, i8* nocapture, i8, i32, i1) nounwind
declare void @llvm.memset.p0i8.i8(i8* nocapture, i8, i8, i32, i1) nounwind
define void @test1() {
; CHECK: @test1
%A = alloca i8
%B = alloca i8
store i8 0, i8* %A ;; Written to by memcpy
; CHECK-NOT: store
call void @llvm.memcpy.p0i8.p0i8.i8(i8* %A, i8* %B, i8 -1, i32 0, i1 false)
ret void
; CHECK: ret void
}
define void @test2() {
; CHECK: @test2
%A = alloca i8
%B = alloca i8
store i8 0, i8* %A ;; Written to by memmove
; CHECK-NOT: store
call void @llvm.memmove.p0i8.p0i8.i8(i8* %A, i8* %B, i8 -1, i32 0, i1 false)
ret void
; CHECK: ret void
}
define void @test3() {
; CHECK: @test3
%A = alloca i8
%B = alloca i8
store i8 0, i8* %A ;; Written to by memset
; CHECK-NOT: store
call void @llvm.memset.p0i8.i8(i8* %A, i8 0, i8 -1, i32 0, i1 false)
ret void
; CHECK: ret void
}
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