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Add writeonly IR attribute

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Summary:
This complements the earlier addition of IntrWriteMem and IntrWriteArgMem
LLVM intrinsic properties, see D18291.

Also start using the attribute for memset, memcpy, and memmove intrinsics,
and remove their special-casing in BasicAliasAnalysis.

Reviewers: reames, joker.eph

Subscribers: joker.eph, llvm-commits

Differential Revision: http://reviews.llvm.org/D18714

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274485 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nicolai Haehnle
2016-07-04 08:01:29 +00:00
parent 061feda889
commit b07f540456
30 changed files with 195 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files
test/Bitcode/attributes.ll
+9 -2
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@@ -204,7 +204,7 @@ define void @f34()
; CHECK: define void @f34()
{
call void @nobuiltin() nobuiltin
; CHECK: call void @nobuiltin() #32
; CHECK: call void @nobuiltin() #33
ret void;
}
@@ -328,6 +328,12 @@ define i8* @f55(i32, i32) allocsize(0, 1) {
ret i8* null
}
; CHECK: define void @f56() #32
define void @f56() writeonly
{
ret void
}
; CHECK: attributes #0 = { noreturn }
; CHECK: attributes #1 = { nounwind }
; CHECK: attributes #2 = { readnone }
@@ -360,4 +366,5 @@ define i8* @f55(i32, i32) allocsize(0, 1) {
; CHECK: attributes #29 = { inaccessiblemem_or_argmemonly }
; CHECK: attributes #30 = { allocsize(0) }
; CHECK: attributes #31 = { allocsize(0,1) }
; CHECK: attributes #32 = { nobuiltin }
; CHECK: attributes #32 = { writeonly }
; CHECK: attributes #33 = { nobuiltin }