[llvm] r329356 - X86 Tests: Add a case for combining sdiv by a splatted pow2 negative. NFC.
Zvi Rackover via llvm-commits
llvm-commits at lists.llvm.org
Thu Apr 5 14:57:20 PDT 2018
Author: zvi
Date: Thu Apr 5 14:57:20 2018
New Revision: 329356
URL: http://llvm.org/viewvc/llvm-project?rev=329356&view=rev
Log:
X86 Tests: Add a case for combining sdiv by a splatted pow2 negative. NFC.
Noticed test was missing while working on D42479.
Modified:
llvm/trunk/test/CodeGen/X86/combine-sdiv.ll
Modified: llvm/trunk/test/CodeGen/X86/combine-sdiv.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/combine-sdiv.ll?rev=329356&r1=329355&r2=329356&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/combine-sdiv.ll (original)
+++ llvm/trunk/test/CodeGen/X86/combine-sdiv.ll Thu Apr 5 14:57:20 2018
@@ -202,6 +202,31 @@ define <4 x i32> @combine_vec_sdiv_by_po
ret <4 x i32> %1
}
+define <4 x i32> @combine_vec_sdiv_by_pow2a_neg(<4 x i32> %x) {
+; SSE-LABEL: combine_vec_sdiv_by_pow2a_neg:
+; SSE: # %bb.0:
+; SSE-NEXT: movdqa %xmm0, %xmm1
+; SSE-NEXT: psrad $31, %xmm1
+; SSE-NEXT: psrld $30, %xmm1
+; SSE-NEXT: paddd %xmm0, %xmm1
+; SSE-NEXT: psrad $2, %xmm1
+; SSE-NEXT: pxor %xmm0, %xmm0
+; SSE-NEXT: psubd %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: combine_vec_sdiv_by_pow2a_neg:
+; AVX: # %bb.0:
+; AVX-NEXT: vpsrad $31, %xmm0, %xmm1
+; AVX-NEXT: vpsrld $30, %xmm1, %xmm1
+; AVX-NEXT: vpaddd %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vpsrad $2, %xmm0, %xmm0
+; AVX-NEXT: vpxor %xmm1, %xmm1, %xmm1
+; AVX-NEXT: vpsubd %xmm0, %xmm1, %xmm0
+; AVX-NEXT: retq
+ %1 = sdiv <4 x i32> %x, <i32 -4, i32 -4, i32 -4, i32 -4>
+ ret <4 x i32> %1
+}
+
define <16 x i8> @combine_vec_sdiv_by_pow2b_v16i8(<16 x i8> %x) {
; SSE-LABEL: combine_vec_sdiv_by_pow2b_v16i8:
; SSE: # %bb.0:
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