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[Mips] Fix clang crashes when assembling invalid MIPS beql instructions with --arch=mips #156413

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[Mips] Fix clang crashes when assembling invalid MIPS beql instructions with --arch=mips #156413

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16 changes: 13 additions & 3 deletions llvm/lib/Target/Mips/MipsInstrInfo.td
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Original file line number Diff line number Diff line change
Expand Up @@ -857,6 +857,16 @@ def calltarget : Operand<iPTR> {

def imm64: Operand<i64>;

def ConstantImmAsmOperandClass : AsmOperandClass {
let Name = "ConstantImm";
let PredicateMethod = "isConstantImm";
let RenderMethod = "addImmOperands";
}

def ConstantImm64: Operand<i64> {
let ParserMatchClass = ConstantImmAsmOperandClass;
}

def simm19_lsl2 : Operand<i32> {
let EncoderMethod = "getSimm19Lsl2Encoding";
let DecoderMethod = "DecodeSimm19Lsl2";
Expand Down Expand Up @@ -2949,10 +2959,10 @@ def : MipsInstAlias<"nor\t$rs, $imm", (NORImm GPR32Opnd:$rs, GPR32Opnd:$rs,

let hasDelaySlot = 1, isCTI = 1 in {
def BneImm : MipsAsmPseudoInst<(outs GPR32Opnd:$rt),
(ins imm64:$imm64, brtarget:$offset),
(ins ConstantImm64:$imm64, brtarget:$offset),
"bne\t$rt, $imm64, $offset">;
def BeqImm : MipsAsmPseudoInst<(outs GPR32Opnd:$rt),
(ins imm64:$imm64, brtarget:$offset),
(ins ConstantImm64:$imm64, brtarget:$offset),
"beq\t$rt, $imm64, $offset">;

class CondBranchPseudo<string instr_asm> :
Expand Down Expand Up @@ -2980,7 +2990,7 @@ def BGTUL: CondBranchPseudo<"bgtul">, ISA_MIPS2_NOT_32R6_64R6;

let isCTI = 1 in
class CondBranchImmPseudo<string instr_asm> :
MipsAsmPseudoInst<(outs), (ins GPR32Opnd:$rs, imm64:$imm, brtarget:$offset),
MipsAsmPseudoInst<(outs), (ins GPR32Opnd:$rs, ConstantImm64:$imm, brtarget:$offset),
!strconcat(instr_asm, "\t$rs, $imm, $offset")>;

def BEQLImmMacro : CondBranchImmPseudo<"beql">, ISA_MIPS2_NOT_32R6_64R6;
Expand Down
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