commit f92a574246b391e905847e74b5e0283589c8741f
author Yi Jiang <yjiang@apple.com> Thu Dec 12 01:55:04 2013 +0000
committer Yi Jiang <yjiang@apple.com> Thu Dec 12 01:55:04 2013 +0000
tree f1617a8e57fa85330f1d62026e2183a7c6a87c2b
parent 4705f8d842662050a88e9c0ac91ff337a5922fb6

Resubmit r196544: Apply transformation on OS X 10.9+ and iOS 7.0+: pow(10, x) ―> __exp10(x)

llvm-svn: 197109

llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp

diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 15b3e66..b555cf8 100644
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -1162,6 +1162,12 @@
           hasUnaryFloatFn(TLI, Op1->getType(), LibFunc::exp2, LibFunc::exp2f,
                           LibFunc::exp2l))
         return EmitUnaryFloatFnCall(Op2, "exp2", B, Callee->getAttributes());
+      // pow(10.0, x) -> exp10(x)
+      if (Op1C->isExactlyValue(10.0) &&
+          hasUnaryFloatFn(TLI, Op1->getType(), LibFunc::exp10, LibFunc::exp10f,
+                          LibFunc::exp10l))
+        return EmitUnaryFloatFnCall(Op2, TLI->getName(LibFunc::exp10), B,
+                                    Callee->getAttributes());
     }
 
     ConstantFP *Op2C = dyn_cast<ConstantFP>(Op2);