[RISCV] Don't print a tab after mnemonics that don't have operands.

[wangpc]

LGTM

[jrtc27]

llvm/lib/Target/RISCV/RISCVInstrFormats.td

165

Surely that's backwards? Anyway, if this works it's shorter and feels more natural to me.

[jrtc27]

llvm/lib/Target/RISCV/RISCVInstrFormats.td

165

Oh, right, !empty is the function, not a negated empty... not confusing at all. Then flip it for:

let AsmString = opcodestr # !if(!empty(argstr), "", "\t" # argstr);

?

[asb]

LGTM.

llvm/lib/Target/RISCV/RISCVInstrFormats.td

 def OPC_CUSTOM_3  : RISCVOpcode<"CUSTOM_3",  0b1111011>;
 
 class RVInstCommon<dag outs, dag ins, string opcodestr, string argstr,
                    list<dag> pattern, InstFormat format> : Instruction {
   let Namespace = "RISCV";
 
   dag OutOperandList = outs;
   dag InOperandList = ins;
-  let AsmString = opcodestr # "\t" # argstr;
+  let AsmString = opcodestr # !if(!empty(argstr), "", "\t" # argstr);
   let Pattern = pattern;
 
   let TSFlags{4-0} = format.Value;
 
   // Defaults
   RISCVVConstraint RVVConstraint = NoConstraint;
   let TSFlags{7-5} = RVVConstraint.Value;