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| author | Dale Johannesen <dalej@apple.com> | 2010-09-30 23:57:10 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2010-09-30 23:57:10 +0000 |
| commit | 0488fb649a56b7fc89a5814df5308813f9e5a85d (patch) | |
| tree | 21913bb81960866b73c6b49f29782c142563304c /test/CodeGen/X86/mmx-shuffle.ll | |
| parent | a7e3b564773cc45a1b08383c09fe86b17b3ffe92 (diff) | |
| download | llvm-0488fb649a56b7fc89a5814df5308813f9e5a85d.tar.gz llvm-0488fb649a56b7fc89a5814df5308813f9e5a85d.tar.bz2 llvm-0488fb649a56b7fc89a5814df5308813f9e5a85d.tar.xz | |
Massive rewrite of MMX:
The x86_mmx type is used for MMX intrinsics, parameters and
return values where these use MMX registers, and is also
supported in load, store, and bitcast.
Only the above operations generate MMX instructions, and optimizations
do not operate on or produce MMX intrinsics.
MMX-sized vectors <2 x i32> etc. are lowered to XMM or split into
smaller pieces. Optimizations may occur on these forms and the
result casted back to x86_mmx, provided the result feeds into a
previous existing x86_mmx operation.
The point of all this is prevent optimizations from introducing
MMX operations, which is unsafe due to the EMMS problem.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115243 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/mmx-shuffle.ll')
| -rw-r--r-- | test/CodeGen/X86/mmx-shuffle.ll | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/test/CodeGen/X86/mmx-shuffle.ll b/test/CodeGen/X86/mmx-shuffle.ll index e3125c7345..9f7501eb7c 100644 --- a/test/CodeGen/X86/mmx-shuffle.ll +++ b/test/CodeGen/X86/mmx-shuffle.ll @@ -22,8 +22,10 @@ entry: %tmp542 = bitcast <2 x i32> %tmp529 to <4 x i16> ; <<4 x i16>> [#uses=1] %tmp543 = add <4 x i16> %tmp542, < i16 0, i16 16448, i16 24672, i16 28784 > ; <<4 x i16>> [#uses=1] %tmp555 = bitcast <4 x i16> %tmp543 to <8 x i8> ; <<8 x i8>> [#uses=1] - tail call void @llvm.x86.mmx.maskmovq( <8 x i8> zeroinitializer, <8 x i8> %tmp555, i8* null ) + %tmp556 = bitcast <8 x i8> %tmp555 to x86_mmx + %tmp557 = bitcast <8 x i8> zeroinitializer to x86_mmx + tail call void @llvm.x86.mmx.maskmovq( x86_mmx %tmp557, x86_mmx %tmp556, i8* null ) ret void } -declare void @llvm.x86.mmx.maskmovq(<8 x i8>, <8 x i8>, i8*) +declare void @llvm.x86.mmx.maskmovq(x86_mmx, x86_mmx, i8*) |