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Optimized integer vector multiplication operation by replacing it with shift/xor/sub when it is possible. Fixed a bug in SDIV, where the const operand is not a splat constant vector.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184931 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Elena Demikhovsky
2013-06-26 10:55:03 +00:00
parent d4429214a2
commit 87070fe107
7 changed files with 151 additions and 28 deletions
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3
test/CodeGen/X86/avx-shift.ll
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@@ -103,9 +103,10 @@ define <32 x i8> @vshift12(<32 x i8> %a) nounwind readnone {
;;; Support variable shifts
; CHECK: _vshift08
; CHECK: vpslld $23
; CHECK: vextractf128 $1
; CHECK: vpslld $23
; CHECK: vpslld $23
; CHECK: ret
define <8 x i32> @vshift08(<8 x i32> %a) nounwind {
%bitop = shl <8 x i32> <i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1>, %a
ret <8 x i32> %bitop