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[XCore] The RRegs register class is a superset of GRRegs.

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At the time when the XCore backend was added there were some issues with
with overlapping register classes but these all seem to be fixed now.
Describing the register classes correctly allow us to get rid of a
codegen only instruction (LDAWSP_lru6_RRegs) and it means we can
disassemble ru6 instructions that use registers above r11.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178782 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Osborne
2013-04-04 19:57:46 +00:00
parent 8256a98847
commit c6ff29713d
5 changed files with 94 additions and 34 deletions
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17
lib/Target/XCore/Disassembler/XCoreDisassembler.cpp
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@ -89,6 +89,11 @@ static DecodeStatus DecodeGRRegsRegisterClass(MCInst &Inst,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeRRegsRegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeBitpOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
@ -214,6 +219,18 @@ static DecodeStatus DecodeGRRegsRegisterClass(MCInst &Inst,
return MCDisassembler::Success;
}
static DecodeStatus DecodeRRegsRegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 15)
return MCDisassembler::Fail;
unsigned Reg = getReg(Decoder, XCore::RRegsRegClassID, RegNo);
Inst.addOperand(MCOperand::CreateReg(Reg));
return MCDisassembler::Success;
}
static DecodeStatus DecodeBitpOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
if (Val > 11)