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29 lines
1.1 KiB
LLVM
29 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=+sse2 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE2
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=+sse4.1 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE41
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; Make sure that the conversion between v4i8 to v2i16 is not a simple bitcast.
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define void @prom_bug(<4 x i8> %t, i16* %p) {
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; SSE2-LABEL: prom_bug:
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; SSE2: ## %bb.0:
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; SSE2-NEXT: pand {{.*}}(%rip), %xmm0
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; SSE2-NEXT: packuswb %xmm0, %xmm0
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; SSE2-NEXT: packuswb %xmm0, %xmm0
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; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,1,0,3]
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; SSE2-NEXT: pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,5,5,6,7]
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; SSE2-NEXT: movd %xmm0, %eax
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; SSE2-NEXT: movw %ax, (%rdi)
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; SSE2-NEXT: retq
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;
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; SSE41-LABEL: prom_bug:
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; SSE41: ## %bb.0:
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; SSE41-NEXT: pshufb {{.*#+}} xmm0 = xmm0[0,4,8,12,u,u,u,u,u,u,u,u,u,u,u,u]
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; SSE41-NEXT: pextrw $0, %xmm0, (%rdi)
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; SSE41-NEXT: retq
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%r = bitcast <4 x i8> %t to <2 x i16>
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%o = extractelement <2 x i16> %r, i32 0
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store i16 %o, i16* %p
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ret void
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}
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