/// Information on scavenged registers (held in a spill slot).
struct ScavengedInfo {
- ScavengedInfo(int FI) : FrameIndex(FI), Reg(0), Restore(NULL) {}
+ ScavengedInfo(int FI = -1) : FrameIndex(FI), Reg(0), Restore(NULL) {}
/// A spill slot used for scavenging a register post register allocation.
int FrameIndex;
void getScavengingFrameIndices(SmallVectorImpl<int> &A) const {
for (SmallVector<ScavengedInfo, 2>::const_iterator I = Scavenged.begin(),
IE = Scavenged.end(); I != IE; ++I)
- A.push_back(I->FrameIndex);
+ if (I->FrameIndex >= 0)
+ A.push_back(I->FrameIndex);
}
/// scavengeRegister - Make a register of the specific register class
if (Scavenged[SI].Reg == 0)
break;
- assert(SI < Scavenged.size() &&
- "Scavenger slots are live, unable to scavenge another register!");
+ if (SI < Scavenged.size()) {
+ // We need to scavenge a register but have no spill slot, the target
+ // must know how to do it (if not, we'll assert below).
+ Scavenged.push_back(ScavengedInfo());
+ }
// Avoid infinite regress
Scavenged[SI].Reg = SReg;