[x86] add tests for vector fdiv with splat divisor; NFC

llvm-svn: 359006

Author: rotateright

llvm/test/CodeGen/X86/fdiv-combine-vec.ll

@@ -0,0 +1,101 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-- -mattr=sse2 | FileCheck %s --check-prefix=SSE
+; RUN: llc < %s -mtriple=x86_64-- -mattr=avx  | FileCheck %s --check-prefix=AVX
+
+define <2 x double> @splat_fdiv_v2f64(<2 x double> %x, double %y) {
+; SSE-LABEL: splat_fdiv_v2f64:
+; SSE:       # %bb.0:
+; SSE-NEXT:    unpcklpd {{.*#+}} xmm1 = xmm1[0,0]
+; SSE-NEXT:    divpd %xmm1, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: splat_fdiv_v2f64:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vmovddup {{.*#+}} xmm1 = xmm1[0,0]
+; AVX-NEXT:    vdivpd %xmm1, %xmm0, %xmm0
+; AVX-NEXT:    retq
+  %vy = insertelement <2 x double> undef, double %y, i32 0
+  %splaty = shufflevector <2 x double> %vy, <2 x double> undef, <2 x i32> zeroinitializer
+  %r = fdiv fast <2 x double> %x, %splaty
+  ret <2 x double> %r
+}
+
+define <4 x double> @splat_fdiv_v4f64(<4 x double> %x, double %y) {
+; SSE-LABEL: splat_fdiv_v4f64:
+; SSE:       # %bb.0:
+; SSE-NEXT:    movsd {{.*#+}} xmm3 = mem[0],zero
+; SSE-NEXT:    divsd %xmm2, %xmm3
+; SSE-NEXT:    unpcklpd {{.*#+}} xmm3 = xmm3[0,0]
+; SSE-NEXT:    mulpd %xmm3, %xmm0
+; SSE-NEXT:    mulpd %xmm3, %xmm1
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: splat_fdiv_v4f64:
+; AVX:       # %bb.0:
+; AVX-NEXT:    vmovddup {{.*#+}} xmm1 = xmm1[0,0]
+; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm1, %ymm1
+; AVX-NEXT:    vdivpd %ymm1, %ymm0, %ymm0
+; AVX-NEXT:    retq
+  %vy = insertelement <4 x double> undef, double %y, i32 0
+  %splaty = shufflevector <4 x double> %vy, <4 x double> undef, <4 x i32> zeroinitializer
+  %r = fdiv arcp <4 x double> %x, %splaty
+  ret <4 x double> %r
+}
+
+define <4 x float> @splat_fdiv_v4f32(<4 x float> %x, float %y) {
+; SSE-LABEL: splat_fdiv_v4f32:
+; 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:
+; 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(<8 x float> %x, float %y) {
+; SSE-LABEL: splat_fdiv_v8f32:
+; SSE:       # %bb.0:
+; SSE-NEXT:    movss {{.*#+}} xmm3 = mem[0],zero,zero,zero
+; SSE-NEXT:    divss %xmm2, %xmm3
+; SSE-NEXT:    shufps {{.*#+}} xmm3 = xmm3[0,0,0,0]
+; SSE-NEXT:    mulps %xmm3, %xmm0
+; SSE-NEXT:    mulps %xmm3, %xmm1
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: splat_fdiv_v8f32:
+; 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
+}