diff options
| author | Manman Ren <mren@apple.com> | 2012-10-30 22:15:38 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-10-30 22:15:38 +0000 |
| commit | 4c74a956b2621bb7bb1df0b2f7571060eb095464 (patch) | |
| tree | b3bc0ee117a8be8e88367fb60d45ced867132a4d /test/CodeGen | |
| parent | a368b89f2842530d07c0ac8e3b533882e165f197 (diff) | |
| download | external_llvm-4c74a956b2621bb7bb1df0b2f7571060eb095464.zip external_llvm-4c74a956b2621bb7bb1df0b2f7571060eb095464.tar.gz external_llvm-4c74a956b2621bb7bb1df0b2f7571060eb095464.tar.bz2 | |
X86 MMX: optimize transfer from mmx to i32
We used to generate a store (movq) + a load.
Now we use movd.
rdar://9946746
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167056 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/mmx-builtins.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/X86/mmx-builtins.ll b/test/CodeGen/X86/mmx-builtins.ll index 8b7200d..a8d33f4 100644 --- a/test/CodeGen/X86/mmx-builtins.ll +++ b/test/CodeGen/X86/mmx-builtins.ll @@ -1043,6 +1043,20 @@ entry: ret i64 %5 } +define i32 @test21_2(<1 x i64> %a) nounwind readnone optsize ssp { +; CHECK: test21_2 +; CHECK: pshufw +; CHECK: movd +entry: + %0 = bitcast <1 x i64> %a to <4 x i16> + %1 = bitcast <4 x i16> %0 to x86_mmx + %2 = tail call x86_mmx @llvm.x86.sse.pshuf.w(x86_mmx %1, i8 3) nounwind readnone + %3 = bitcast x86_mmx %2 to <4 x i16> + %4 = bitcast <4 x i16> %3 to <2 x i32> + %5 = extractelement <2 x i32> %4, i32 0 + ret i32 %5 +} + declare x86_mmx @llvm.x86.mmx.pmulu.dq(x86_mmx, x86_mmx) nounwind readnone define i64 @test20(<1 x i64> %a, <1 x i64> %b) nounwind readnone optsize ssp { |