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Adjust processFunctionBeforeCalleeSavedScan() to correctly reserve a stack

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slot for the register scavenger when compiling Thumb1 functions.

llvm-svn: 83023
This commit is contained in:
Jim Grosbach 2009-09-28 22:08:06 +00:00
parent 74e63461d2
commit 9cb82ce219
1 changed files with 4 additions and 2 deletions
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6
lib/Target/ARM/ARMBaseRegisterInfo.cpp
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@ -536,7 +536,8 @@ ARMBaseRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
} }
} }
if (CSRegClasses[i] == ARM::GPRRegisterClass) { if (CSRegClasses[i] == ARM::GPRRegisterClass ||
CSRegClasses[i] == ARM::tGPRRegisterClass) {
if (Spilled) { if (Spilled) {
NumGPRSpills++; NumGPRSpills++;
@ -667,7 +668,8 @@ ARMBaseRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
NumExtras--; NumExtras--;
} }
} }
while (NumExtras && !UnspilledCS2GPRs.empty()) { while (NumExtras && !UnspilledCS2GPRs.empty() &&
!AFI->isThumb1OnlyFunction()) {
unsigned Reg = UnspilledCS2GPRs.back(); unsigned Reg = UnspilledCS2GPRs.back();
UnspilledCS2GPRs.pop_back(); UnspilledCS2GPRs.pop_back();
if (!isReservedReg(MF, Reg)) { if (!isReservedReg(MF, Reg)) {