forked from OSchip/llvm-project
22 lines
716 B
LLVM
22 lines
716 B
LLVM
; RUN: opt -basic-aa -dse -S < %s | FileCheck %s
|
|
|
|
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
|
|
|
|
define void @fn(i8* nocapture %buf) #0 {
|
|
entry:
|
|
|
|
; We would not eliminate the first memcpy with data layout, and we should not
|
|
; eliminate it without data layout.
|
|
; CHECK-LABEL: @fn
|
|
; CHECK: tail call void @llvm.memcpy.p0i8.p0i8.i64
|
|
; CHECK: tail call void @llvm.memcpy.p0i8.p0i8.i64
|
|
; CHECK: ret void
|
|
|
|
%arrayidx = getelementptr i8, i8* %buf, i64 18
|
|
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %arrayidx, i8* %buf, i64 18, i1 false)
|
|
store i8 1, i8* %arrayidx, align 1
|
|
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %buf, i8* %arrayidx, i64 18, i1 false)
|
|
ret void
|
|
}
|
|
|