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Use movq to move low half of XMM register and zero-extend the rest.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50874 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-05-08 22:35:02 +00:00
parent 748118d8aa
commit fd17f42bab
2 changed files with 12 additions and 1 deletions
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3
lib/Target/X86/X86InstrSSE.td
View File

@ -2916,7 +2916,8 @@ let AddedComplexity = 15 in
def : Pat<(v2f64 (vector_shuffle immAllZerosV_bc, VR128:$src,
MOVL_shuffle_mask)),
(MOVZPQILo2PQIrr VR128:$src)>, Requires<[HasSSE2]>;
def : Pat<(v2f64 (X86zvmovl (v2f64 VR128:$src))),
(MOVZPQILo2PQIrr VR128:$src)>, Requires<[HasSSE2]>;
// FIXME: Temporary workaround since 2-wide shuffle is broken.
def : Pat<(int_x86_sse2_movs_d VR128:$src1, VR128:$src2),

10
test/CodeGen/X86/vec_set-E.ll Normal file
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@ -0,0 +1,10 @@
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 | grep movq
define i32 @t(float %X) nounwind {
%tmp11 = insertelement <4 x float> undef, float %X, i32 0
%tmp12 = insertelement <4 x float> %tmp11, float %X, i32 1
%tmp27 = insertelement <4 x float> %tmp12, float 0.000000e+00, i32 2
%tmp28 = insertelement <4 x float> %tmp27, float 0.000000e+00, i32 3
store <4 x float> %tmp28, <4 x float>* null, align 16
ret i32 0
}