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Fix bugs handling ESP in alloca references

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7591 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-08-05 04:13:58 +00:00
parent ffaee37556
commit 8c8194500d
1 changed files with 6 additions and 3 deletions
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9
lib/CodeGen/RegAllocLocal.cpp
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@ -232,7 +232,8 @@ void RA::removePhysReg(unsigned PhysReg) {
///
void RA::spillVirtReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator &I,
unsigned VirtReg, unsigned PhysReg) {
assert((VirtReg || DisableKill) && "Spilling a physical register is illegal!"
if (!VirtReg && DisableKill) return;
assert(VirtReg && "Spilling a physical register is illegal!"
" Must not have appropriate kill for the register or use exists beyond"
" the intended one.");
DEBUG(std::cerr << " Spilling register " << RegInfo->getName(PhysReg);
@ -606,8 +607,10 @@ void RA::AllocateBasicBlock(MachineBasicBlock &MBB) {
// Spill all physical registers holding virtual registers now.
while (!PhysRegsUsed.empty())
spillVirtReg(MBB, I, PhysRegsUsed.begin()->second,
PhysRegsUsed.begin()->first);
if (unsigned VirtReg = PhysRegsUsed.begin()->second)
spillVirtReg(MBB, I, VirtReg, PhysRegsUsed.begin()->first);
else
removePhysReg(PhysRegsUsed.begin()->first);
for (std::map<unsigned, unsigned>::iterator I = Virt2PhysRegMap.begin(),
E = Virt2PhysRegMap.end(); I != E; ++I)