Fix more instances of dropped fast math flags when optimizing FADD instructions. All found by inspection (aka grep).

llvm-svn: 199528

1 files changed, 16 insertions, 0 deletions

diff --git a/llvm/test/Transforms/InstCombine/fast-math.ll b/llvm/test/Transforms/InstCombine/fast-math.ll
index 0371488dfd8..de51c494685 100644
--- a/llvm/test/Transforms/InstCombine/fast-math.ll
+++ b/llvm/test/Transforms/InstCombine/fast-math.ll
@@ -160,6 +160,22 @@ define float @fold15(float %x, float %y) {
 ; CHECK: ret
 }
 
+; (select X+Y, X-Y) => X + (select Y, -Y)
+define float @fold16(float %x, float %y) {
+  %cmp = fcmp ogt float %x, %y
+  %plus = fadd fast float %x, %y
+  %minus = fsub fast float %x, %y
+  %r = select i1 %cmp, float %plus, float %minus
+  ret float %r
+; CHECK: fold16
+; CHECK: fsub fast float
+; CHECK: select
+; CHECK: fadd fast float
+; CHECK: ret
+}
+
+
+
 ; =========================================================================
 ;
 ;   Testing-cases about fmul begin