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[GlobalISel][CallLowering] Tighten constantexpr check for callee.

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I'm not sure there's a test case for this, but it's better to be safe.
This commit is contained in:
Amara Emerson 2020-02-09 10:09:51 -08:00
parent bf5760c5ab
commit b69eda2e73
1 changed files with 2 additions and 1 deletions
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3
lib/CodeGen/GlobalISel/CallLowering.cpp
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@ -56,7 +56,8 @@ bool CallLowering::lowerCall(MachineIRBuilder &MIRBuilder, ImmutableCallSite CS,
// Try looking through a bitcast from one function type to another.
// Commonly happens with calls to objc_msgSend().
const Value *CalleeV = CS.getCalledValue();
if (auto *BC = dyn_cast<ConstantExpr>(CalleeV)) {
auto *BC = dyn_cast<ConstantExpr>(CalleeV);
if (BC && BC->getOpcode() == Instruction::BitCast) {
if (const auto *F = dyn_cast<Function>(BC->getOperand(0))) {
Info.Callee = MachineOperand::CreateGA(F, 0);
}