mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 20:23:11 +01:00
bcb47e287f
D18714 introduced writeonly attribute: "Also start using the attribute for memset, memcpy, and memmove intrinsics, and remove their special-casing in BasicAliasAnalysis." But actually, writeonly was not attached to memmove - oversight, it seems. So let's add it. As we can see, this helps DSE to eliminate redundant stores. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D89724
37 lines
2.1 KiB
LLVM
37 lines
2.1 KiB
LLVM
; RUN: opt -S < %s | FileCheck %s
|
|
|
|
; Test to ensure that calls to the memcpy/memmove/memset intrinsics are auto-upgraded
|
|
; to remove the alignment parameter in favour of align attributes on the pointer args.
|
|
|
|
; Make sure a non-zero alignment is propagated
|
|
define void @test(i8* %p1, i8* %p2, i8* %p3) {
|
|
; CHECK-LABEL: @test
|
|
; CHECK: call void @llvm.memset.p0i8.i64(i8* align 4 %p1, i8 55, i64 100, i1 false)
|
|
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %p1, i8* align 4 %p2, i64 50, i1 false)
|
|
; CHECK: call void @llvm.memmove.p0i8.p0i8.i64(i8* align 4 %p2, i8* align 4 %p3, i64 1000, i1 false)
|
|
call void @llvm.memset.p0i8.i64(i8* %p1, i8 55, i64 100, i32 4, i1 false)
|
|
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p1, i8* %p2, i64 50, i32 4, i1 false)
|
|
call void @llvm.memmove.p0i8.p0i8.i64(i8* %p2, i8* %p3, i64 1000, i32 4, i1 false)
|
|
ret void
|
|
}
|
|
|
|
; Make sure that a zero alignment is handled properly
|
|
define void @test2(i8* %p1, i8* %p2, i8* %p3) {
|
|
; CHECK-LABEL: @test
|
|
; CHECK: call void @llvm.memset.p0i8.i64(i8* %p1, i8 55, i64 100, i1 false)
|
|
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p1, i8* %p2, i64 50, i1 false)
|
|
; CHECK: call void @llvm.memmove.p0i8.p0i8.i64(i8* %p2, i8* %p3, i64 1000, i1 false)
|
|
call void @llvm.memset.p0i8.i64(i8* %p1, i8 55, i64 100, i32 0, i1 false)
|
|
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p1, i8* %p2, i64 50, i32 0, i1 false)
|
|
call void @llvm.memmove.p0i8.p0i8.i64(i8* %p2, i8* %p3, i64 1000, i32 0, i1 false)
|
|
ret void
|
|
}
|
|
|
|
; CHECK: declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg)
|
|
; CHECK: declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
|
|
; CHECK: declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1 immarg)
|
|
declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i32, i1)
|
|
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly , i8* nocapture readonly, i64, i32, i1)
|
|
declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32, i1)
|
|
|