[X86][SSE] Add FADD combine tests.

llvm-svn: 249240

1 files changed, 196 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/fadd-combines.ll b/llvm/test/CodeGen/X86/fadd-combines.ll
new file mode 100644
index 00000000000..5eb455d14c1
--- /dev/null
+++ b/llvm/test/CodeGen/X86/fadd-combines.ll
@@ -0,0 +1,196 @@
+; RUN: llc -mtriple=x86_64-unknown-unknown < %s | FileCheck %s
+
+define float @fadd_zero_f32(float %x) #0 {
+; CHECK-LABEL: fadd_zero_f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    retq
+  %y = fadd float %x, 0.0
+  ret float %y
+}
+
+define <4 x float> @fadd_zero_4f32(<4 x float> %x) #0 {
+; CHECK-LABEL: fadd_zero_4f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    xorps %xmm1, %xmm1
+; CHECK-NEXT:    addps %xmm1, %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd <4 x float> %x, zeroinitializer
+  ret <4 x float> %y
+}
+
+define float @fadd_2const_f32(float %x) #0 {
+; CHECK-LABEL: fadd_2const_f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    addss {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd float %x, 1.0
+  %z = fadd float %y, 2.0
+  ret float %z
+}
+
+define <4 x float> @fadd_2const_4f32(<4 x float> %x) #0 {
+; CHECK-LABEL: fadd_2const_4f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    addps {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    addps {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0>
+  %z = fadd <4 x float> %y, <float 4.0, float 3.0, float 2.0, float 1.0>
+  ret <4 x float> %z
+}
+
+define float @fadd_x_fmul_x_c_f32(float %x) #0 {
+; CHECK-LABEL: fadd_x_fmul_x_c_f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulss {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fmul float %x, 2.0
+  %z = fadd float %x, %y
+  ret float %z
+}
+
+define <4 x float> @fadd_x_fmul_x_c_4f32(<4 x float> %x) #0 {
+; CHECK-LABEL: fadd_x_fmul_x_c_4f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    movaps {{.*#+}} xmm1 = [1.000000e+00,2.000000e+00,3.000000e+00,4.000000e+00]
+; CHECK-NEXT:    mulps %xmm0, %xmm1
+; CHECK-NEXT:    addps %xmm1, %xmm0
+; CHECK-NEXT:    retq
+  %y = fmul <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0>
+  %z = fadd <4 x float> %x, %y
+  ret <4 x float> %z
+}
+
+define float @fadd_fmul_x_c_x_f32(float %x) #0 {
+; CHECK-LABEL: fadd_fmul_x_c_x_f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulss {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fmul float %x, 2.0
+  %z = fadd float %y, %x
+  ret float %z
+}
+
+define <4 x float> @fadd_fmul_x_c_x_4f32(<4 x float> %x) #0 {
+; CHECK-LABEL: fadd_fmul_x_c_x_4f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    movaps {{.*#+}} xmm1 = [1.000000e+00,2.000000e+00,3.000000e+00,4.000000e+00]
+; CHECK-NEXT:    mulps %xmm0, %xmm1
+; CHECK-NEXT:    addps %xmm1, %xmm0
+; CHECK-NEXT:    retq
+  %y = fmul <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0>
+  %z = fadd <4 x float> %y, %x
+  ret <4 x float> %z
+}
+
+define float @fadd_fadd_x_x_fmul_x_c_f32(float %x) #0 {
+; CHECK-LABEL: fadd_fadd_x_x_fmul_x_c_f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulss {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd float %x, %x
+  %z = fmul float %x, 2.0
+  %w = fadd float %y, %z
+  ret float %w
+}
+
+define <4 x float> @fadd_fadd_x_x_fmul_x_c_4f32(<4 x float> %x) #0 {
+; CHECK-LABEL: fadd_fadd_x_x_fmul_x_c_4f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    movaps {{.*#+}} xmm1 = [1.000000e+00,2.000000e+00,3.000000e+00,4.000000e+00]
+; CHECK-NEXT:    mulps %xmm0, %xmm1
+; CHECK-NEXT:    addps %xmm0, %xmm1
+; CHECK-NEXT:    addps %xmm1, %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd <4 x float> %x, %x
+  %z = fmul <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0>
+  %w = fadd <4 x float> %y, %z
+  ret <4 x float> %w
+}
+
+define float @fadd_fmul_x_c_fadd_x_x_f32(float %x) #0 {
+; CHECK-LABEL: fadd_fmul_x_c_fadd_x_x_f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulss {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd float %x, %x
+  %z = fmul float %x, 2.0
+  %w = fadd float %z, %y
+  ret float %w
+}
+
+define <4 x float> @fadd_fmul_x_c_fadd_x_x_4f32(<4 x float> %x) #0 {
+; CHECK-LABEL: fadd_fmul_x_c_fadd_x_x_4f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    movaps {{.*#+}} xmm1 = [1.000000e+00,2.000000e+00,3.000000e+00,4.000000e+00]
+; CHECK-NEXT:    mulps %xmm0, %xmm1
+; CHECK-NEXT:    addps %xmm0, %xmm1
+; CHECK-NEXT:    addps %xmm1, %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd <4 x float> %x, %x
+  %z = fmul <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0>
+  %w = fadd <4 x float> %z, %y
+  ret <4 x float> %w
+}
+
+define float @fadd_x_fadd_x_x_f32(float %x) #0 {
+; CHECK-LABEL: fadd_x_fadd_x_x_f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulss {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd float %x, %x
+  %z = fadd float %x, %y
+  ret float %z
+}
+
+define <4 x float> @fadd_x_fadd_x_x_4f32(<4 x float> %x) #0 {
+; CHECK-LABEL: fadd_x_fadd_x_x_4f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulps {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd <4 x float> %x, %x
+  %z = fadd <4 x float> %x, %y
+  ret <4 x float> %z
+}
+
+define float @fadd_fadd_x_x_x_f32(float %x) #0 {
+; CHECK-LABEL: fadd_fadd_x_x_x_f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulss {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd float %x, %x
+  %z = fadd float %y, %x
+  ret float %z
+}
+
+define <4 x float> @fadd_fadd_x_x_x_4f32(<4 x float> %x) #0 {
+; CHECK-LABEL: fadd_fadd_x_x_x_4f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulps {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd <4 x float> %x, %x
+  %z = fadd <4 x float> %y, %x
+  ret <4 x float> %z
+}
+
+define float @fadd_fadd_x_x_fadd_x_x_f32(float %x) #0 {
+; CHECK-LABEL: fadd_fadd_x_x_fadd_x_x_f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulss {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd float %x, %x
+  %z = fadd float %y, %y
+  ret float %z
+}
+
+define <4 x float> @fadd_fadd_x_x_fadd_x_x_4f32(<4 x float> %x) #0 {
+; CHECK-LABEL: fadd_fadd_x_x_fadd_x_x_4f32:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    mulps {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %y = fadd <4 x float> %x, %x
+  %z = fadd <4 x float> %y, %y
+  ret <4 x float> %z
+}
+
+attributes #0 = { "less-precise-fpmad"="true" "no-infs-fp-math"="true" "no-nans-fp-math"="true" "unsafe-fp-math"="true" }