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[x86] add test with volatile load; NFC 

Test for D126353
This commit is contained in:
Sanjay Patel 2022-05-25 08:13:43 -04:00
parent f96aa834d7
commit d5ebba2aa6
1 changed files with 35 additions and 0 deletions
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35
llvm/test/CodeGen/X86/extractelement-load.ll
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@ -338,6 +338,41 @@ define i32 @multi_use_load_scalarization(<4 x i32>* %p) nounwind {
ret i32 %r
}
define i32 @multi_use_volatile_load_scalarization(<4 x i32>* %p) nounwind {
; X32-SSE2-LABEL: multi_use_volatile_load_scalarization:
; X32-SSE2: # %bb.0:
; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X32-SSE2-NEXT: movl (%ecx), %eax
; X32-SSE2-NEXT: movdqu (%ecx), %xmm0
; X32-SSE2-NEXT: pcmpeqd %xmm1, %xmm1
; X32-SSE2-NEXT: psubd %xmm1, %xmm0
; X32-SSE2-NEXT: movdqa %xmm0, (%ecx)
; X32-SSE2-NEXT: retl
;
; X64-SSSE3-LABEL: multi_use_volatile_load_scalarization:
; X64-SSSE3: # %bb.0:
; X64-SSSE3-NEXT: movl (%rdi), %eax
; X64-SSSE3-NEXT: movdqu (%rdi), %xmm0
; X64-SSSE3-NEXT: pcmpeqd %xmm1, %xmm1
; X64-SSSE3-NEXT: psubd %xmm1, %xmm0
; X64-SSSE3-NEXT: movdqa %xmm0, (%rdi)
; X64-SSSE3-NEXT: retq
;
; X64-AVX-LABEL: multi_use_volatile_load_scalarization:
; X64-AVX: # %bb.0:
; X64-AVX-NEXT: movl (%rdi), %eax
; X64-AVX-NEXT: vmovdqu (%rdi), %xmm0
; X64-AVX-NEXT: vpcmpeqd %xmm1, %xmm1, %xmm1
; X64-AVX-NEXT: vpsubd %xmm1, %xmm0, %xmm0
; X64-AVX-NEXT: vmovdqa %xmm0, (%rdi)
; X64-AVX-NEXT: retq
%v = load volatile <4 x i32>, <4 x i32>* %p, align 1
%v1 = add <4 x i32> %v, <i32 1, i32 1, i32 1, i32 1>
store <4 x i32> %v1, <4 x i32>* %p
%r = extractelement <4 x i32> %v, i64 0
ret i32 %r
}
; This test is reduced from a C source example that showed a miscompile:
; https://github.com/llvm/llvm-project/issues/53695
; The scalarized loads from 'zero' in the AVX asm must occur before