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* Follow the PowerPC convention of leaving 24 bytes for linking on the stack.

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* Also leave space for spilling integer registers (this should be calculated)

llvm-svn: 14554
This commit is contained in:
Misha Brukman 2004-07-01 21:35:00 +00:00
parent f5deab6100
commit c9ecaeb69d
1 changed files with 5 additions and 2 deletions
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7
lib/Target/PowerPC/PowerPCRegisterInfo.cpp
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@ -195,7 +195,10 @@ void PowerPCRegisterInfo::emitPrologue(MachineFunction &MF) const {
// in the function immediately on entry to the current function. This
// eliminates the need for add/sub brackets around call sites.
//
NumBytes += MFI->getMaxCallFrameSize();
NumBytes += MFI->getMaxCallFrameSize() +
24 /* Predefined PowerPC link area */ +
12*4 /* Spilled int regs */ +
0*8 /* Spilled fp regs */;
// Round the size to a multiple of the alignment (don't forget the 4 byte
// offset though).
@ -217,7 +220,7 @@ void PowerPCRegisterInfo::emitPrologue(MachineFunction &MF) const {
// adjust stack pointer: r1 -= numbytes
if (NumBytes) {
MI = BuildMI(PPC32::STWU, 2, PPC32::R1).addImm(-80).addReg(PPC32::R1);
MI = BuildMI(PPC32::STWU, 2, PPC32::R1).addImm(-NumBytes).addReg(PPC32::R1);
MBB.insert(MBBI, MI);
}
}