Combine (fcmp cc0 x, y) | (fcmp cc1 x, y) into a single fcmp when possible.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57515 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 34 insertions, 0 deletions

diff --git a/test/Transforms/InstCombine/or-fcmp.ll b/test/Transforms/InstCombine/or-fcmp.ll
new file mode 100644
index 0000000..3833c6f
--- /dev/null
+++ b/test/Transforms/InstCombine/or-fcmp.ll
@@ -0,0 +1,34 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep fcmp | count 3
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep ret | grep 1
+
+define zeroext i8 @t1(float %x, float %y) nounwind {
+       %a = fcmp ueq float %x, %y             ; <i1> [#uses=1]
+       %b = fcmp uno float %x, %y               ; <i1> [#uses=1]
+       %c = or i1 %a, %b
+       %retval = zext i1 %c to i8
+       ret i8 %retval
+}
+
+define zeroext i8 @t2(float %x, float %y) nounwind {
+       %a = fcmp olt float %x, %y             ; <i1> [#uses=1]
+       %b = fcmp oeq float %x, %y               ; <i1> [#uses=1]
+       %c = or i1 %a, %b
+       %retval = zext i1 %c to i8
+       ret i8 %retval
+}
+
+define zeroext i8 @t3(float %x, float %y) nounwind {
+       %a = fcmp ult float %x, %y             ; <i1> [#uses=1]
+       %b = fcmp uge float %x, %y               ; <i1> [#uses=1]
+       %c = or i1 %a, %b
+       %retval = zext i1 %c to i8
+       ret i8 %retval
+}
+
+define zeroext i8 @t4(float %x, float %y) nounwind {
+       %a = fcmp ult float %x, %y             ; <i1> [#uses=1]
+       %b = fcmp ugt float %x, %y               ; <i1> [#uses=1]
+       %c = or i1 %a, %b
+       %retval = zext i1 %c to i8
+       ret i8 %retval
+}