14d1e502df
Replaces a pair of insert_subvectors with a single (implicitly widened) vector - also reduce uses of the src. Hopefully this should address most of the remaining widen subvector regressions I'm seeing while trying to aggressively convert TRUNCATE to PACKSS/PACKUS.
22 lines
839 B
LLVM
22 lines
839 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx512f | FileCheck %s
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define void @foo(<16 x float> %x) {
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; CHECK-LABEL: foo:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vaddps %xmm0, %xmm0, %xmm0
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; CHECK-NEXT: vshuff64x2 {{.*#+}} zmm0 = zmm0[0,1,0,1,0,1,0,1]
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; CHECK-NEXT: vmovupd %zmm0, (%rax)
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: retq
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%1 = fadd <16 x float> %x, %x
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%bc256 = bitcast <16 x float> %1 to <4 x i128>
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%2 = extractelement <4 x i128> %bc256, i32 0
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%3 = bitcast i128 %2 to <4 x float>
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%4 = shufflevector <4 x float> %3, <4 x float> undef, <16 x i32> <i32 0, i32
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1, i32 2, i32 3, i32 0, i32 1, i32 2, i32 3, i32 0, i32 1, i32 2, i32 3, i32 0,
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i32 1, i32 2, i32 3>
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store <16 x float> %4, ptr undef, align 4
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ret void
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}
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