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Use movsd to shuffle in the lowest two elements of a v4f32 / v4i32 vector when
movlps cannot be used (e.g. when load from m64 has multiple uses). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28089 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -2481,6 +2481,14 @@ def : Pat<(v2i64 (vector_shuffle VR128:$src1, VR128:$src2,
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MOVL_shuffle_mask)),
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(v2i64 (MOVLPDrr VR128:$src1, VR128:$src2))>, Requires<[HasSSE2]>;
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// vector_shuffle v1, v2 <4, 5, 2, 3> using MOVLPDrr (movsd)
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def : Pat<(v4f32 (vector_shuffle VR128:$src1, VR128:$src2,
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MOVLP_shuffle_mask)),
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(v4f32 (MOVLPDrr VR128:$src1, VR128:$src2))>, Requires<[HasSSE2]>;
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def : Pat<(v4i32 (vector_shuffle VR128:$src1, VR128:$src2,
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MOVLP_shuffle_mask)),
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(v4i32 (MOVLPDrr VR128:$src1, VR128:$src2))>, Requires<[HasSSE2]>;
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// Set lowest element and zero upper elements.
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def : Pat<(bc_v2i64 (vector_shuffle immAllZerosV,
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(v2f64 (scalar_to_vector (loadf64 addr:$src))),
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11
test/CodeGen/X86/vec_shuffle-5.ll
Normal file
11
test/CodeGen/X86/vec_shuffle-5.ll
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@ -0,0 +1,11 @@
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; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 | grep movsd | wc -l | grep 1
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void %test() {
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%tmp1 = load <4 x float>* null
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%tmp2 = shufflevector <4 x float> %tmp1, <4 x float> < float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00 >, <4 x uint> < uint 0, uint 1, uint 6, uint 7 >
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%tmp3 = shufflevector <4 x float> %tmp1, <4 x float> zeroinitializer, <4 x uint> < uint 2, uint 3, uint 6, uint 7 >
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%tmp4 = add <4 x float> %tmp2, %tmp3
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store <4 x float> %tmp4, <4 x float>* null
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ret void
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}
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