commit daa8cd10d9624f41882136e6c747af8d0d179de3
author Karthik Bhat <kv.bhat@samsung.com> Thu Mar 06 05:32:52 2014 +0000
committer Karthik Bhat <kv.bhat@samsung.com> Thu Mar 06 05:32:52 2014 +0000
tree d34e1a1102c28b74be8f0eba323b8a2f880e17ba
parent da1ebedeea4314d92e6688da36f0e6ea66eb3dd6

Allow constant folding of copysign

llvm-svn: 203076

llvm/lib/Analysis/ConstantFolding.cpp

diff --git a/llvm/lib/Analysis/ConstantFolding.cpp b/llvm/lib/Analysis/ConstantFolding.cpp
index 08b6067..ff1124a 100644
--- a/llvm/lib/Analysis/ConstantFolding.cpp
+++ b/llvm/lib/Analysis/ConstantFolding.cpp
@@ -1195,6 +1195,7 @@
   case Intrinsic::cttz:
   case Intrinsic::fma:
   case Intrinsic::fmuladd:
+  case Intrinsic::copysign:
   case Intrinsic::sadd_with_overflow:
   case Intrinsic::uadd_with_overflow:
   case Intrinsic::ssub_with_overflow:
@@ -1532,6 +1533,12 @@
         if (IntrinsicID == Intrinsic::pow) {
           return ConstantFoldBinaryFP(pow, Op1V, Op2V, Ty);
         }
+        if (IntrinsicID == Intrinsic::copysign) {
+          APFloat V1 = Op1->getValueAPF();
+          APFloat V2 = Op2->getValueAPF();
+          V1.copySign(V2);
+          return ConstantFP::get(Ty->getContext(), V1);
+        }
         if (!TLI)
           return 0;
         if (Name == "pow" && TLI->has(LibFunc::pow))