[SimplifyLibCalls] Don't crash if the function doesn't have a name.

[oota-llvm.git] / lib / Transforms / Utils / SimplifyLibCalls.cpp

diff --git a/lib/Transforms/Utils/SimplifyLibCalls.cpp b/lib/Transforms/Utils/SimplifyLibCalls.cpp
index c811e19f8b27d2c7539ac7993718e7824ebb98bd..47e587fab7b6a94f585a36a26d47b909fde4a72d 100644 (file)
--- a/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -1317,9 +1317,8 @@ Value *LibCallSimplifier::optimizeLog(CallInst *CI, IRBuilder<> &B) {
 
   LibFunc::Func Func;
   Function *F = OpC->getCalledFunction();
-  StringRef FuncName = F->getName();
-  if ((TLI->getLibFunc(FuncName, Func) && TLI->has(Func) &&
-      Func == LibFunc::pow) || F->getIntrinsicID() == Intrinsic::pow)
+  if (F && ((TLI->getLibFunc(F->getName(), Func) && TLI->has(Func) &&
+      Func == LibFunc::pow) || F->getIntrinsicID() == Intrinsic::pow))
     return B.CreateFMul(OpC->getArgOperand(1),
       EmitUnaryFloatFnCall(OpC->getOperand(0), Callee->getName(), B,
                            Callee->getAttributes()), "mul");
@@ -2301,12 +2300,10 @@ void LibCallSimplifier::replaceAllUsesWith(Instruction *I, Value *With) {
 //
 // log, logf, logl:
 //   * log(exp(x))   -> x
-//   * log(x**y)     -> y*log(x)
 //   * log(exp(y))   -> y*log(e)
 //   * log(exp2(y))  -> y*log(2)
 //   * log(exp10(y)) -> y*log(10)
 //   * log(sqrt(x))  -> 0.5*log(x)
-//   * log(pow(x,y)) -> y*log(x)
 //
 // lround, lroundf, lroundl:
 //   * lround(cnst) -> cnst'