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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2013-02-04 15:19:33 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2013-02-04 15:19:33 +0000 |
| commit | 2c9da989c20aacc523b8751ca45a11f4f24f8d54 (patch) | |
| tree | 270c2a37c402a15b718d229d2f7e5e40648c096f /llvm/test/CodeGen/X86/avx-shift.ll | |
| parent | 0611298446763222cb555d89aefe9f42cba0f683 (diff) | |
| download | bcm5719-llvm-2c9da989c20aacc523b8751ca45a11f4f24f8d54.tar.gz bcm5719-llvm-2c9da989c20aacc523b8751ca45a11f4f24f8d54.zip | |
X86: Open up some opportunities for constant folding by postponing shift lowering.
Fixes PR15141.
llvm-svn: 174327
Diffstat (limited to 'llvm/test/CodeGen/X86/avx-shift.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/avx-shift.ll | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/avx-shift.ll b/llvm/test/CodeGen/X86/avx-shift.ll index 681747b844a..b0bff454c18 100644 --- a/llvm/test/CodeGen/X86/avx-shift.ll +++ b/llvm/test/CodeGen/X86/avx-shift.ll @@ -112,6 +112,16 @@ define <8 x i32> @vshift08(<8 x i32> %a) nounwind { ret <8 x i32> %bitop } +; PR15141 +; CHECK: _vshift13: +; CHECK-NOT: vpsll +; CHECK: vcvttps2dq +; CHECK-NEXT: vpmulld +define <4 x i32> @vshift13(<4 x i32> %in) { + %T = shl <4 x i32> %in, <i32 0, i32 1, i32 2, i32 4> + ret <4 x i32> %T +} + ;;; Uses shifts for sign extension ; CHECK: _sext_v16i16 ; CHECK: vpsllw |
