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ARM: respect tied 64-bit inlineasm operands when printing

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The code for 'Q' and 'R' operand modifiers needs to look through tied
operands to discover the register class.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188990 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tim Northover
2013-08-22 06:51:04 +00:00
parent 021f3280fe
commit bccc6f89b7
2 changed files with 27 additions and 0 deletions
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17
lib/Target/ARM/ARMAsmPrinter.cpp
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@@ -496,6 +496,23 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
if (!FlagsOP.isImm())
return true;
unsigned Flags = FlagsOP.getImm();
// This operand may not be the one that actually provides the register. If
// it's tied to a previous one then we should refer instead to that one
// for registers and their classes.
unsigned TiedIdx;
if (InlineAsm::isUseOperandTiedToDef(Flags, TiedIdx)) {
for (OpNum = InlineAsm::MIOp_FirstOperand; TiedIdx; --TiedIdx) {
unsigned OpFlags = MI->getOperand(OpNum).getImm();
OpNum += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
}
Flags = MI->getOperand(OpNum).getImm();
// Later code expects OpNum to be pointing at the register rather than
// the flags.
OpNum += 1;
}
unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
unsigned RC;
InlineAsm::hasRegClassConstraint(Flags, RC);