[InstCombine] Add preliminary tests for nested min/max combines. NFC
Summary: As requested in D53774.
Reviewers: spatel
Reviewed By: spatel
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D53875
llvm-svn: 345616
diff --git a/llvm/test/Transforms/InstCombine/maximum.ll b/llvm/test/Transforms/InstCombine/maximum.ll
index 302b21c..1b31147 100644
--- a/llvm/test/Transforms/InstCombine/maximum.ll
+++ b/llvm/test/Transforms/InstCombine/maximum.ll
@@ -145,6 +145,66 @@
ret float %y
}
+define float @maximum_f32_1_maximum_val_p0(float %x) {
+; CHECK-LABEL: @maximum_f32_1_maximum_val_p0(
+; CHECK-NEXT: [[Y:%.*]] = call float @llvm.maximum.f32(float %x, float 0.000000e+00)
+; CHECK-NEXT: [[RES:%.*]] = call float @llvm.maximum.f32(float [[Y]], float 1.000000e+00)
+; CHECK-NEXT: ret float [[RES]]
+ %y = call float @llvm.maximum.f32(float %x, float 0.0)
+ %z = call float @llvm.maximum.f32(float %y, float 1.0)
+ ret float %z
+}
+
+define float @maximum_f32_1_maximum_p0_val_fast(float %x) {
+; CHECK-LABEL: @maximum_f32_1_maximum_p0_val_fast(
+; CHECK-NEXT: [[Y:%.*]] = call float @llvm.maximum.f32(float %x, float 0.000000e+00)
+; CHECK-NEXT: [[RES:%.*]] = call fast float @llvm.maximum.f32(float [[Y]], float 1.000000e+00)
+; CHECK-NEXT: ret float [[RES]]
+ %y = call float @llvm.maximum.f32(float 0.0, float %x)
+ %z = call fast float @llvm.maximum.f32(float %y, float 1.0)
+ ret float %z
+}
+
+define float @maximum_f32_1_maximum_p0_val_nnan_ninf(float %x) {
+; CHECK-LABEL: @maximum_f32_1_maximum_p0_val_nnan_ninf(
+; CHECK-NEXT: [[Y:%.*]] = call float @llvm.maximum.f32(float %x, float 0.000000e+00)
+; CHECK-NEXT: [[RES:%.*]] = call nnan ninf float @llvm.maximum.f32(float [[Y]], float 1.000000e+00)
+; CHECK-NEXT: ret float [[RES]]
+ %y = call float @llvm.maximum.f32(float 0.0, float %x)
+ %z = call nnan ninf float @llvm.maximum.f32(float %y, float 1.0)
+ ret float %z
+}
+
+define float @maximum_f32_p0_maximum_val_n0(float %x) {
+; CHECK-LABEL: @maximum_f32_p0_maximum_val_n0(
+; CHECK-NEXT: [[Y:%.*]] = call float @llvm.maximum.f32(float %x, float -0.000000e+00)
+; CHECK-NEXT: [[RES:%.*]] = call float @llvm.maximum.f32(float [[Y]], float 0.000000e+00)
+; CHECK-NEXT: ret float [[RES]]
+ %y = call float @llvm.maximum.f32(float %x, float -0.0)
+ %z = call float @llvm.maximum.f32(float %y, float 0.0)
+ ret float %z
+}
+
+define float @maximum_f32_1_maximum_p0_val(float %x) {
+; CHECK-LABEL: @maximum_f32_1_maximum_p0_val(
+; CHECK-NEXT: [[Y:%.*]] = call float @llvm.maximum.f32(float %x, float 0.000000e+00)
+; CHECK-NEXT: [[RES:%.*]] = call float @llvm.maximum.f32(float [[Y]], float 1.000000e+00)
+; CHECK-NEXT: ret float [[RES]]
+ %y = call float @llvm.maximum.f32(float 0.0, float %x)
+ %z = call float @llvm.maximum.f32(float %y, float 1.0)
+ ret float %z
+}
+
+define <2 x float> @maximum_f32_1_maximum_val_p0_val_v2f32(<2 x float> %x) {
+; CHECK-LABEL: @maximum_f32_1_maximum_val_p0_val_v2f32(
+; CHECK-NEXT: [[Y:%.*]] = call <2 x float> @llvm.maximum.v2f32(<2 x float> %x, <2 x float> zeroinitializer)
+; CHECK-NEXT: [[RES:%.*]] = call <2 x float> @llvm.maximum.v2f32(<2 x float> [[Y]], <2 x float> <float 1.000000e+00, float 1.000000e+00>)
+; CHECK-NEXT: ret <2 x float> [[RES]]
+ %y = call <2 x float> @llvm.maximum.v2f32(<2 x float> %x, <2 x float> zeroinitializer)
+ %z = call <2 x float> @llvm.maximum.v2f32(<2 x float> %y, <2 x float><float 1.0, float 1.0>)
+ ret <2 x float> %z
+}
+
define float @maximum4(float %x, float %y, float %z, float %w) {
; CHECK-LABEL: @maximum4(
; CHECK-NEXT: [[A:%.*]] = call float @llvm.maximum.f32(float [[X:%.*]], float [[Y:%.*]])