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ARM load/store label parsing.

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Allow labels for load/store instructions when parsing. There's encoding
issues, still, so this doesn't work all the way through, yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137064 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2011-08-08 20:59:31 +00:00
parent 2df3f58a0b
commit 09176e10db
1 changed files with 14 additions and 0 deletions
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14
lib/Target/ARM/AsmParser/ARMAsmParser.cpp
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@ -566,6 +566,12 @@ public:
return Val > -256 && Val < 256; return Val > -256 && Val < 256;
} }
bool isMemImm12Offset() const { bool isMemImm12Offset() const {
// If we have an immediate that's not a constant, treat it as a label
// reference needing a fixup. If it is a constant, it's something else
// and we reject it.
if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
return true;
if (Kind != Memory || Mem.OffsetRegNum != 0) if (Kind != Memory || Mem.OffsetRegNum != 0)
return false; return false;
// Immediate offset in range [-4095, 4095]. // Immediate offset in range [-4095, 4095].
@ -830,6 +836,14 @@ public:
void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const { void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
assert(N == 2 && "Invalid number of operands!"); assert(N == 2 && "Invalid number of operands!");
// If this is an immediate, it's a label reference.
if (Kind == Immediate) {
addExpr(Inst, getImm());
Inst.addOperand(MCOperand::CreateImm(0));
return;
}
// Otherwise, it's a normal memory reg+offset.
int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0; int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum)); Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
Inst.addOperand(MCOperand::CreateImm(Val)); Inst.addOperand(MCOperand::CreateImm(Val));