[x86] add tests for vector fdiv reciprocal estimate; NFC

llvm-svn: 359238

1 files changed, 64 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/fdiv-combine-vec.ll b/llvm/test/CodeGen/X86/fdiv-combine-vec.ll
index 6c05712581d..6de3f31892d 100644
--- a/llvm/test/CodeGen/X86/fdiv-combine-vec.ll
+++ b/llvm/test/CodeGen/X86/fdiv-combine-vec.ll
@@ -105,3 +105,67 @@ define <8 x float> @splat_fdiv_v8f32(<8 x float> %x, float %y) {
   %r = fdiv fast <8 x float> %x, %splaty
   ret <8 x float> %r
 }
+
+define <4 x float> @splat_fdiv_v4f32_estimate(<4 x float> %x, float %y) #0 {
+; SSE-LABEL: splat_fdiv_v4f32_estimate:
+; SSE:       # %bb.0:
+; SSE-NEXT:    shufps {{.*#+}} xmm1 = xmm1[0,0,0,0]
+; SSE-NEXT:    rcpps %xmm1, %xmm2
+; SSE-NEXT:    mulps %xmm2, %xmm1
+; SSE-NEXT:    movaps {{.*#+}} xmm3 = [1.0E+0,1.0E+0,1.0E+0,1.0E+0]
+; SSE-NEXT:    subps %xmm1, %xmm3
+; SSE-NEXT:    mulps %xmm2, %xmm3
+; SSE-NEXT:    addps %xmm2, %xmm3
+; SSE-NEXT:    mulps %xmm3, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: splat_fdiv_v4f32_estimate:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpermilps {{.*#+}} xmm1 = xmm1[0,0,0,0]
+; AVX-NEXT:    vrcpps %xmm1, %xmm2
+; AVX-NEXT:    vmulps %xmm2, %xmm1, %xmm1
+; AVX-NEXT:    vmovaps {{.*#+}} xmm3 = [1.0E+0,1.0E+0,1.0E+0,1.0E+0]
+; AVX-NEXT:    vsubps %xmm1, %xmm3, %xmm1
+; AVX-NEXT:    vmulps %xmm1, %xmm2, %xmm1
+; AVX-NEXT:    vaddps %xmm1, %xmm2, %xmm1
+; AVX-NEXT:    vmulps %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    retq
+  %vy = insertelement <4 x float> undef, float %y, i32 0
+  %splaty = shufflevector <4 x float> %vy, <4 x float> undef, <4 x i32> zeroinitializer
+  %r = fdiv arcp reassoc <4 x float> %x, %splaty
+  ret <4 x float> %r
+}
+
+define <8 x float> @splat_fdiv_v8f32_estimate(<8 x float> %x, float %y) #0 {
+; SSE-LABEL: splat_fdiv_v8f32_estimate:
+; SSE:       # %bb.0:
+; SSE-NEXT:    rcpss %xmm2, %xmm3
+; SSE-NEXT:    mulss %xmm3, %xmm2
+; SSE-NEXT:    movss {{.*#+}} xmm4 = mem[0],zero,zero,zero
+; SSE-NEXT:    subss %xmm2, %xmm4
+; SSE-NEXT:    mulss %xmm3, %xmm4
+; SSE-NEXT:    addss %xmm3, %xmm4
+; SSE-NEXT:    shufps {{.*#+}} xmm4 = xmm4[0,0,0,0]
+; SSE-NEXT:    mulps %xmm4, %xmm0
+; SSE-NEXT:    mulps %xmm4, %xmm1
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: splat_fdiv_v8f32_estimate:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vpermilps {{.*#+}} xmm1 = xmm1[0,0,0,0]
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm1, %ymm1
+; AVX-NEXT:    vrcpps %ymm1, %ymm2
+; AVX-NEXT:    vmulps %ymm2, %ymm1, %ymm1
+; AVX-NEXT:    vmovaps {{.*#+}} ymm3 = [1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0]
+; AVX-NEXT:    vsubps %ymm1, %ymm3, %ymm1
+; AVX-NEXT:    vmulps %ymm1, %ymm2, %ymm1
+; AVX-NEXT:    vaddps %ymm1, %ymm2, %ymm1
+; AVX-NEXT:    vmulps %ymm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+  %vy = insertelement <8 x float> undef, float %y, i32 0
+  %splaty = shufflevector <8 x float> %vy, <8 x float> undef, <8 x i32> zeroinitializer
+  %r = fdiv fast <8 x float> %x, %splaty
+  ret <8 x float> %r
+}
+
+attributes #0 = { "reciprocal-estimates"="divf,vec-divf" }