commit cd0274ca189040a2fd883b00a678184afc2cda3a
author Benjamin Kramer <benny.kra@googlemail.com> Thu Mar 31 10:11:58 2011 +0000
committer Benjamin Kramer <benny.kra@googlemail.com> Thu Mar 31 10:11:58 2011 +0000
tree 891e6633d316d3d59d67988a0b022554538c8072
parent 021cf96ffc954250f500c9721ff4aad409a47434

InstCombine: fold fcmp (fpext x), (fpext y) -> fcmp x, y.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128624 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/InstCombine/InstCombineCompares.cpp

diff --git a/lib/Transforms/InstCombine/InstCombineCompares.cpp b/lib/Transforms/InstCombine/InstCombineCompares.cpp
index 8787e2a..698b715 100644
--- a/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -2813,5 +2813,12 @@
       }
   }
 
+  // fcmp (fpext x), (fpext y) -> fcmp x, y
+  if (FPExtInst *LHSExt = dyn_cast<FPExtInst>(Op0))
+    if (FPExtInst *RHSExt = dyn_cast<FPExtInst>(Op1))
+      if (LHSExt->getSrcTy() == RHSExt->getSrcTy())
+        return new FCmpInst(I.getPredicate(), LHSExt->getOperand(0),
+                            RHSExt->getOperand(0));
+
   return Changed ? &I : 0;
 }