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Unify CALLSEQ_{START,END}. They take 4 parameters: the chain, two stack

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adjustment fields, and an optional flag. If there is a "dynamic_stackalloc" in
the code, make sure that it's bracketed by CALLSEQ_START and CALLSEQ_END. If
not, then there is the potential for the stack to be changed while the stack's
being used by another instruction (like a call).

This can only result in tears...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44037 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2007-11-13 00:44:25 +00:00
parent 3ba3a9b586
commit 0f8d9c04d9
17 changed files with 129 additions and 70 deletions
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5
lib/Target/ARM/ARMRegisterInfo.cpp
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@@ -769,10 +769,13 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
bool isThumb = AFI->isThumbFunction();
ARMCC::CondCodes Pred = isThumb
? ARMCC::AL : (ARMCC::CondCodes)Old->getOperand(1).getImmedValue();
unsigned PredReg = isThumb ? 0 : Old->getOperand(2).getReg();
if (Opc == ARM::ADJCALLSTACKDOWN || Opc == ARM::tADJCALLSTACKDOWN) {
// Note: PredReg is operand 2 for ADJCALLSTACKDOWN.
unsigned PredReg = isThumb ? 0 : Old->getOperand(2).getReg();
emitSPUpdate(MBB, I, -Amount, Pred, PredReg, isThumb, TII);
} else {
// Note: PredReg is operand 3 for ADJCALLSTACKUP.
unsigned PredReg = isThumb ? 0 : Old->getOperand(3).getReg();
assert(Opc == ARM::ADJCALLSTACKUP || Opc == ARM::tADJCALLSTACKUP);
emitSPUpdate(MBB, I, Amount, Pred, PredReg, isThumb, TII);
}