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Fix UnitTests/2005-05-12-Int64ToFP.c with llc-beta. In particular, do not

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allow it to go into an infinite loop, filling up the disk!

llvm-svn: 30494
This commit is contained in:
Chris Lattner 2006-09-19 18:02:01 +00:00
parent cd52f85028
commit 66029d909b
1 changed files with 10 additions and 7 deletions
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17
lib/CodeGen/RegAllocLocal.cpp
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@ -621,18 +621,21 @@ void RA::AllocateBasicBlock(MachineBasicBlock &MBB) {
for (const unsigned *ImplicitDefs = TID.ImplicitDefs;
*ImplicitDefs; ++ImplicitDefs) {
unsigned Reg = *ImplicitDefs;
if (PhysRegsUsed[Reg] == -2) continue;
spillPhysReg(MBB, MI, Reg, true);
PhysRegsUseOrder.push_back(Reg);
PhysRegsUsed[Reg] = 0; // It is free and reserved now
bool IsNonAllocatable = PhysRegsUsed[Reg] == -2;
if (!IsNonAllocatable) {
spillPhysReg(MBB, MI, Reg, true);
PhysRegsUseOrder.push_back(Reg);
PhysRegsUsed[Reg] = 0; // It is free and reserved now
}
PhysRegsEverUsed[Reg] = true;
for (const unsigned *AliasSet = RegInfo->getAliasSet(Reg);
*AliasSet; ++AliasSet) {
if (PhysRegsUsed[*AliasSet] != -2) {
PhysRegsUseOrder.push_back(*AliasSet);
PhysRegsUsed[*AliasSet] = 0; // It is free and reserved now
if (!IsNonAllocatable) {
PhysRegsUseOrder.push_back(*AliasSet);
PhysRegsUsed[*AliasSet] = 0; // It is free and reserved now
}
PhysRegsEverUsed[*AliasSet] = true;
}
}