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[x86] add failure to splat test (PR38949); NFC 

llvm-svn: 342346
This commit is contained in:
Sanjay Patel 2018-09-16 14:59:04 +00:00
parent 6356864e6d
commit 3e095174b0
1 changed files with 27 additions and 0 deletions
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27
llvm/test/CodeGen/X86/avx-vbroadcastf128.ll
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@ -98,6 +98,33 @@ define <32 x i8> @test_broadcast_16i8_32i8(<16 x i8> *%p) nounwind {
ret <32 x i8> %2
}
; PR38949 - https://bugs.llvm.org/show_bug.cgi?id=38949
; Don't limit the transform based on extra uses of the load itself (the store is a user of the load's chain value).
define void @subv_reuse_is_ok(<4 x float>* %a, <8 x float>* %b) {
; X32-LABEL: subv_reuse_is_ok:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: vmovups (%ecx), %xmm0
; X32-NEXT: vinsertf128 $1, %xmm0, %ymm0, %ymm0
; X32-NEXT: vmovups %ymm0, (%eax)
; X32-NEXT: vzeroupper
; X32-NEXT: retl
;
; X64-LABEL: subv_reuse_is_ok:
; X64: # %bb.0:
; X64-NEXT: vmovups (%rdi), %xmm0
; X64-NEXT: vinsertf128 $1, %xmm0, %ymm0, %ymm0
; X64-NEXT: vmovups %ymm0, (%rsi)
; X64-NEXT: vzeroupper
; X64-NEXT: retq
%ld = load <4 x float>, <4 x float>* %a, align 1
%splat128 = shufflevector <4 x float> %ld, <4 x float> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 0, i32 1, i32 2, i32 3>
store <8 x float> %splat128, <8 x float>* %b, align 16
ret void
}
define <4 x double> @test_broadcast_2f64_4f64_reuse(<2 x double>* %p0, <2 x double>* %p1) {
; X32-LABEL: test_broadcast_2f64_4f64_reuse:
; X32: # %bb.0: