[llvm] r254265 - [SimplifyLibCalls] Don't crash if the function doesn't have a name.

[Davide Italiano via llvm-commits]

Author: davide
Date: Sun Nov 29 15:58:56 2015
New Revision: 254265

URL: http://llvm.org/viewvc/llvm-project?rev=254265&view=rev
Log:
[SimplifyLibCalls] Don't crash if the function doesn't have a name.

Modified:
    llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp
    llvm/trunk/test/Transforms/InstCombine/log-pow.ll

Modified: llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp?rev=254265&r1=254264&r2=254265&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/SimplifyLibCalls.cpp Sun Nov 29 15:58:56 2015
@@ -1317,9 +1317,8 @@ Value *LibCallSimplifier::optimizeLog(Ca
 
   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");

Modified: llvm/trunk/test/Transforms/InstCombine/log-pow.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/log-pow.ll?rev=254265&r1=254264&r2=254265&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/log-pow.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/log-pow.ll Sun Nov 29 15:58:56 2015
@@ -13,6 +13,15 @@ entry:
 ; CHECK:   ret double %mul
 ; CHECK: }
 
+define double @test2(double ()* %fptr, double %p1) #0 {
+  %call1 = call double %fptr()
+  %pow = call double @log(double %call1)
+  ret double %pow
+}
+
+; CHECK-LABEL: @test2
+; CHECK: log
+
 declare double @log(double) #0
 declare double @llvm.pow.f64(double, double)