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[InstCombine] Fix PR43617 

Check for `nullptr` before inspecting composite function.

llvm-svn: 374243
This commit is contained in:
Evandro Menezes 2019-10-09 22:03:23 +00:00
parent 0156be59b4
commit d2f4c452d9
1 changed files with 5 additions and 4 deletions
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9
llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
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@ -1916,10 +1916,10 @@ Value *LibCallSimplifier::optimizeLog(CallInst *Log, IRBuilder<> &B) {
B.setFastMathFlags(FastMathFlags::getFast());
Function *ArgFn = Arg->getCalledFunction();
StringRef ArgNm = ArgFn->getName();
Intrinsic::ID ArgID = ArgFn->getIntrinsicID();
Intrinsic::ID ArgID =
ArgFn ? ArgFn->getIntrinsicID() : Intrinsic::not_intrinsic;
LibFunc ArgLb = NotLibFunc;
TLI->getLibFunc(ArgNm, ArgLb);
TLI->getLibFunc(Arg, ArgLb);
// log(pow(x,y)) -> y*log(x)
if (ArgLb == PowLb || ArgID == Intrinsic::pow) {
@ -1934,9 +1934,10 @@ Value *LibCallSimplifier::optimizeLog(CallInst *Log, IRBuilder<> &B) {
substituteInParent(Arg, MulY);
return MulY;
}
// log(exp{,2,10}(y)) -> y*log({e,2,10})
// TODO: There is no exp10() intrinsic yet.
else if (ArgLb == ExpLb || ArgLb == Exp2Lb || ArgLb == Exp10Lb ||
if (ArgLb == ExpLb || ArgLb == Exp2Lb || ArgLb == Exp10Lb ||
ArgID == Intrinsic::exp || ArgID == Intrinsic::exp2) {
Constant *Eul;
if (ArgLb == ExpLb || ArgID == Intrinsic::exp)