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[x86] Disambiguate RET[QL] and fix aliases for 16-bit mode

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I couldn't see how to do this sanely without splitting RETQ from RETL.

Eric says: "sad about the inability to roundtrip them now, but...".
I have no idea what that means, but perhaps it wants preserving in the
commit comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198756 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Woodhouse
2014-01-08 12:58:07 +00:00
parent 1c75f15a60
commit d7ae82f8f5
13 changed files with 109 additions and 41 deletions
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lib/Target/X86/X86FrameLowering.cpp
+6 -4
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@@ -107,7 +107,8 @@ static unsigned findDeadCallerSavedReg(MachineBasicBlock &MBB,
unsigned Opc = MBBI->getOpcode();
switch (Opc) {
default: return 0;
case X86::RET:
case X86::RETL:
case X86::RETQ:
case X86::RETI:
case X86::TCRETURNdi:
case X86::TCRETURNri:
@@ -728,7 +729,8 @@ void X86FrameLowering::emitEpilogue(MachineFunction &MF,
switch (RetOpcode) {
default:
llvm_unreachable("Can only insert epilog into returning blocks");
case X86::RET:
case X86::RETQ:
case X86::RETL:
case X86::RETI:
case X86::TCRETURNdi:
case X86::TCRETURNri:
@@ -886,8 +888,8 @@ void X86FrameLowering::emitEpilogue(MachineFunction &MF,
// Delete the pseudo instruction TCRETURN.
MBB.erase(MBBI);
} else if ((RetOpcode == X86::RET || RetOpcode == X86::RETI) &&
(X86FI->getTCReturnAddrDelta() < 0)) {
} else if ((RetOpcode == X86::RETQ || RetOpcode == X86::RETI ||
RetOpcode == X86::RETL) && (X86FI->getTCReturnAddrDelta() < 0)) {
// Add the return addr area delta back since we are not tail calling.
int delta = -1*X86FI->getTCReturnAddrDelta();
MBBI = MBB.getLastNonDebugInstr();