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| author | Sanjay Patel <spatel@rotateright.com> | 2015-07-30 21:41:50 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2015-07-30 21:41:50 +0000 |
| commit | 1166f2ff9f30a84fea630888b297bf58c3dba7e9 (patch) | |
| tree | 80e04d68cbf5db5d6a91f2c552dc5f0fff249ca8 /llvm/test/CodeGen/X86/memcpy.ll | |
| parent | 0deb694d943f914657437229f077b64aacf4fec7 (diff) | |
| download | bcm5719-llvm-1166f2ff9f30a84fea630888b297bf58c3dba7e9.tar.gz bcm5719-llvm-1166f2ff9f30a84fea630888b297bf58c3dba7e9.zip | |
fix memcpy/memset/memmove lowering when optimizing for size
Fixing MinSize attribute handling was discussed in D11363.
This is a prerequisite patch to doing that.
The handling of OptSize when lowering mem* functions was broken
on Darwin because it wants to ignore -Os for these cases, but the
existing logic also made it ignore -Oz (MinSize).
The Linux change demonstrates a widespread problem. The backend
doesn't usually recognize the MinSize attribute by itself; it
assumes that if the MinSize attribute exists, then the OptSize
attribute must also exist.
Fixing this more generally will be a follow-on patch or two.
Differential Revision: http://reviews.llvm.org/D11568
llvm-svn: 243693
Diffstat (limited to 'llvm/test/CodeGen/X86/memcpy.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/memcpy.ll | 53 |
1 files changed, 3 insertions, 50 deletions
diff --git a/llvm/test/CodeGen/X86/memcpy.ll b/llvm/test/CodeGen/X86/memcpy.ll index 78d250930c2..00669443d6d 100644 --- a/llvm/test/CodeGen/X86/memcpy.ll +++ b/llvm/test/CodeGen/X86/memcpy.ll @@ -59,48 +59,16 @@ entry: ; DARWIN: movq } -; FIXME: Both Linux and Darwin should lower to a memcpy call; minsize is on. define void @test3_minsize(i8* nocapture %A, i8* nocapture %B) nounwind minsize noredzone { tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false) ret void ; LINUX-LABEL: test3_minsize: -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq -; LINUX: movq +; LINUX: memcpy ; DARWIN-LABEL: test3_minsize: -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq +; DARWIN: memcpy } -; FIXME: Darwin should lower to a memcpy call; minsize is on. define void @test3_minsize_optsize(i8* nocapture %A, i8* nocapture %B) nounwind optsize minsize noredzone { tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false) ret void @@ -108,22 +76,7 @@ define void @test3_minsize_optsize(i8* nocapture %A, i8* nocapture %B) nounwind ; LINUX: memcpy ; DARWIN-LABEL: test3_minsize_optsize: -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq -; DARWIN: movq +; DARWIN: memcpy } ; Large constant memcpy's should be inlined when not optimizing for size. |
