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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-10-30 17:31:21 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-10-30 17:31:21 +0000 |
| commit | dade3c144818e4888831ed13c1efaef28934ac78 (patch) | |
| tree | 3041fe09b09382135008db3d6fa1083019c605d9 /test/CodeGen/X86/x86-shifts.ll | |
| parent | 6762427e8e068c8517ff7ab6a54f699e2bb2dec7 (diff) | |
X86: Emit logical shift by constant splat of <16 x i8> as a <8 x i16> shift and zero out the bits where zeros should've been shifted in.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143315 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/x86-shifts.ll')
| -rw-r--r-- | test/CodeGen/X86/x86-shifts.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/CodeGen/X86/x86-shifts.ll b/test/CodeGen/X86/x86-shifts.ll index 5a91b09047..3e44eafa24 100644 --- a/test/CodeGen/X86/x86-shifts.ll +++ b/test/CodeGen/X86/x86-shifts.ll @@ -152,3 +152,21 @@ entry: %K = xor <2 x i32> %B, %C ret <2 x i32> %K } + +define <16 x i8> @shl9(<16 x i8> %A) nounwind { + %B = shl <16 x i8> %A, <i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3> + ret <16 x i8> %B +; CHECK: shl9: +; CHECK: psllw $3 +; CHECK: pand +; CHECK: ret +} + +define <16 x i8> @shr9(<16 x i8> %A) nounwind { + %B = lshr <16 x i8> %A, <i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3, i8 3> + ret <16 x i8> %B +; CHECK: shr9: +; CHECK: psrlw $3 +; CHECK: pand +; CHECK: ret +} |