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363a2799ff
The only type that isn't an integer, isn't floating point, and isn't a vector; ladies and gentlemen, the gift that keeps on giving: x86_mmx! Fixes PR23246. Original message (reverted in r235062): [CodeGen] Combine concat_vectors of scalars into build_vector. Combine something like: (v8i8 concat_vectors (v2i8 bitcast (i16)) x4) into: (v8i8 (bitcast (v4i16 BUILD_VECTOR (i16) x4))) If any of the scalars are floating point, use that throughout. Differential Revision: http://reviews.llvm.org/D8948 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235072 91177308-0d34-0410-b5e6-96231b3b80d8
20 lines
550 B
LLVM
20 lines
550 B
LLVM
; RUN: llc < %s -mtriple x86_64-unknown-unknown | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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; PR23246
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; We're really only interested in doing something sane with the shuffle.
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; CHECK-LABEL: test:
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; CHECK: movq2dq %mm0, %xmm0
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; CHECK-NEXT: pshufd {{.*}} xmm0 = xmm0[0,1,0,1]
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; CHECK-NEXT: retq
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define <2 x i64> @test(x86_mmx %a) #0 {
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entry:
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%b = bitcast x86_mmx %a to <1 x i64>
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%s = shufflevector <1 x i64> %b, <1 x i64> undef, <2 x i32> <i32 undef, i32 0>
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ret <2 x i64> %s
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}
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attributes #0 = { nounwind }
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