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Hack to let the move lowering handle dynamic-no-pic absolute moves of 

TLVP:

movl _a@TLVP, %eax

Daniel: Please review if you get a chance.
llvm-svn: 106194
This commit is contained in:
Eric Christopher 2010-06-17 00:51:48 +00:00
parent 849bccafe0
commit 29b58afdf1
1 changed files with 15 additions and 4 deletions
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19
llvm/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
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@ -277,10 +277,21 @@ static void SimplifyShortMoveForm(MCInst &Inst, unsigned Opcode) {
return;
// Check whether this is an absolute address.
if (Inst.getOperand(AddrBase + 0).getReg() != 0 ||
Inst.getOperand(AddrBase + 2).getReg() != 0 ||
Inst.getOperand(AddrBase + 4).getReg() != 0 ||
Inst.getOperand(AddrBase + 1).getImm() != 1)
// FIXME: We know TLVP symbol refs aren't, but there should be a better way
// to do this here.
bool Absolute = true;
if (Inst.getOperand(AddrOp).isExpr()) {
const MCExpr *MCE = Inst.getOperand(AddrOp).getExpr();
if (const MCSymbolRefExpr *SRE = dyn_cast<MCSymbolRefExpr>(MCE))
if (SRE->getKind() == MCSymbolRefExpr::VK_TLVP)
Absolute = false;
}
if (Absolute &&
(Inst.getOperand(AddrBase + 0).getReg() != 0 ||
Inst.getOperand(AddrBase + 2).getReg() != 0 ||
Inst.getOperand(AddrBase + 4).getReg() != 0 ||
Inst.getOperand(AddrBase + 1).getImm() != 1))
return;
// If so, rewrite the instruction.