[InstSimplify] add tests for fcmp with known-never-nan operands; NFC

Opposite predicate for rL362742 / rL362879 / D62979

llvm-svn: 362902

1 files changed, 48 insertions, 2 deletions

diff --git a/llvm/test/Transforms/InstSimplify/floating-point-compare.ll b/llvm/test/Transforms/InstSimplify/floating-point-compare.ll
index cefcff1dac7..b02248d3afc 100644
--- a/llvm/test/Transforms/InstSimplify/floating-point-compare.ll
+++ b/llvm/test/Transforms/InstSimplify/floating-point-compare.ll
@@ -309,6 +309,30 @@ define <2 x i1> @UIToFP_is_not_negative_vec(<2 x i32> %x) {
   ret <2 x i1> %r
 }
 
+; No FMF are required for this transform.
+
+define i1 @UIToFP_is_not_negative_or_nan(i32 %x) {
+; CHECK-LABEL: @UIToFP_is_not_negative_or_nan(
+; CHECK-NEXT:    [[A:%.*]] = uitofp i32 [[X:%.*]] to float
+; CHECK-NEXT:    [[R:%.*]] = fcmp ult float [[A]], 0.000000e+00
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %a = uitofp i32 %x to float
+  %r = fcmp ult float %a, 0.000000e+00
+  ret i1 %r
+}
+
+define <2 x i1> @UIToFP_is_not_negative_or_nan_vec(<2 x i32> %x) {
+; CHECK-LABEL: @UIToFP_is_not_negative_or_nan_vec(
+; CHECK-NEXT:    [[A:%.*]] = uitofp <2 x i32> [[X:%.*]] to <2 x float>
+; CHECK-NEXT:    [[R:%.*]] = fcmp ult <2 x float> [[A]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[R]]
+;
+  %a = uitofp <2 x i32> %x to <2 x float>
+  %r = fcmp ult <2 x float> %a, zeroinitializer
+  ret <2 x i1> %r
+}
+
 define i1 @UIToFP_nnan_is_not_negative(i32 %x) {
 ; CHECK-LABEL: @UIToFP_nnan_is_not_negative(
 ; CHECK-NEXT:    ret i1 false
@@ -401,6 +425,28 @@ define <2 x i1> @fabs_is_not_negative_vec(<2 x double> %x) {
 
 define i1 @fabs_nnan_is_not_negative(double %x) {
 ; CHECK-LABEL: @fabs_nnan_is_not_negative(
+; CHECK-NEXT:    [[FABS:%.*]] = tail call nnan double @llvm.fabs.f64(double [[X:%.*]])
+; CHECK-NEXT:    [[CMP:%.*]] = fcmp ult double [[FABS]], 0.000000e+00
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %fabs = tail call nnan double @llvm.fabs.f64(double %x)
+  %cmp = fcmp ult double %fabs, 0.0
+  ret i1 %cmp
+}
+
+define <2 x i1> @fabs_nnan_is_not_negative_vec(<2 x double> %x) {
+; CHECK-LABEL: @fabs_nnan_is_not_negative_vec(
+; CHECK-NEXT:    [[FABS:%.*]] = tail call nnan <2 x double> @llvm.fabs.v2f64(<2 x double> [[X:%.*]])
+; CHECK-NEXT:    [[CMP:%.*]] = fcmp ult <2 x double> [[FABS]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[CMP]]
+;
+  %fabs = tail call nnan <2 x double> @llvm.fabs.v2f64(<2 x double> %x)
+  %cmp = fcmp ult <2 x double> %fabs, zeroinitializer
+  ret <2 x i1> %cmp
+}
+
+define i1 @fabs_fcmp-nnan_is_not_negative(double %x) {
+; CHECK-LABEL: @fabs_fcmp-nnan_is_not_negative(
 ; CHECK-NEXT:    ret i1 false
 ;
   %fabs = tail call double @llvm.fabs.f64(double %x)
@@ -408,8 +454,8 @@ define i1 @fabs_nnan_is_not_negative(double %x) {
   ret i1 %cmp
 }
 
-define <2 x i1> @fabs_nnan_is_not_negative_vec(<2 x double> %x) {
-; CHECK-LABEL: @fabs_nnan_is_not_negative_vec(
+define <2 x i1> @fabs_fcmp-nnan_is_not_negative_vec(<2 x double> %x) {
+; CHECK-LABEL: @fabs_fcmp-nnan_is_not_negative_vec(
 ; CHECK-NEXT:    ret <2 x i1> zeroinitializer
 ;
   %fabs = tail call <2 x double> @llvm.fabs.v2f64(<2 x double> %x)