Differential D60427 Diff 198366 llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp

Changeset View

Standalone View

llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp

This file is larger than 256 KB, so syntax highlighting is disabled by default.

Show First 20 Lines • Show All 1,982 Lines • ▼ Show 20 Lines	ARMTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
}		}

if (!MemOpChains.empty())		if (!MemOpChains.empty())
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);		Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);

// Build a sequence of copy-to-reg nodes chained together with token chain		// Build a sequence of copy-to-reg nodes chained together with token chain
// and flag operands which copy the outgoing args into the appropriate regs.		// and flag operands which copy the outgoing args into the appropriate regs.
SDValue InFlag;		SDValue InFlag;
// Tail call byval lowering might overwrite argument registers so in case of
// tail call optimization the copies to registers are lowered later.
if (!isTailCall)
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {		for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,		Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
RegsToPass[i].second, InFlag);		RegsToPass[i].second, InFlag);
InFlag = Chain.getValue(1);		InFlag = Chain.getValue(1);
}		}

// For tail calls lower the arguments to the 'real' stack slot.
if (isTailCall) {
// Force all the incoming stack arguments to be loaded from the stack
// before any new outgoing arguments are stored to the stack, because the
// outgoing stack slots may alias the incoming argument stack slots, and
// the alias isn't otherwise explicit. This is slightly more conservative
// than necessary, because it means that each store effectively depends
// on every argument instead of just those arguments it would clobber.

// Do not flag preceding copytoreg stuff together with the following stuff.
InFlag = SDValue();
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
RegsToPass[i].second, InFlag);
InFlag = Chain.getValue(1);
}
InFlag = SDValue();
}

// If the callee is a GlobalAddress/ExternalSymbol node (quite common, every		// If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
// direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol		// direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
// node so that legalize doesn't hack it.		// node so that legalize doesn't hack it.
bool isDirect = false;		bool isDirect = false;

const TargetMachine &TM = getTargetMachine();		const TargetMachine &TM = getTargetMachine();
const Module *Mod = MF.getFunction().getParent();		const Module *Mod = MF.getFunction().getParent();
const GlobalValue *GV = nullptr;		const GlobalValue *GV = nullptr;
▲ Show 20 Lines • Show All 13,324 Lines • Show Last 20 Lines