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Teach reginfo how to deal with ADJSTACKPTRri, allowing us to generate:

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add %ESP, 20
        jmp %EDX  # TAIL CALL

instead of:
        add %ESP, -8
        add %ESP, 28
        jmp %EDX  # TAIL CALL


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22047 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-05-15 05:49:58 +00:00
parent 381e88799e
commit 5fae9ccd39
1 changed files with 3 additions and 0 deletions
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3
lib/Target/X86/X86RegisterInfo.cpp
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@ -544,6 +544,9 @@ void X86RegisterInfo::emitEpilogue(MachineFunction &MF,
PI->getOperand(0).getReg() == X86::ESP) {
NumBytes -= PI->getOperand(1).getImmedValue();
MBB.erase(PI);
} else if (PI->getOpcode() == X86::ADJSTACKPTRri) {
NumBytes += PI->getOperand(1).getImmedValue();
MBB.erase(PI);
}
}