AMDGPU: Fix not adding exec to defs of cmpx instruction pseudos

[arsenm]

Summary

This was only set on the final _si/_vi version, but not on the pseudos most of codegen sees.

No test since these instructions aren't used yet.

[• tstellarAMD]

LGTM.

[arsenm]

r248583

lib/Target/AMDGPU/SIInstrInfo.td

 
 multiclass VOP3_C_m <vop op, dag outs, dag ins, string asm,
                      list<dag> pattern, string opName,
                      bit HasMods, bit defExec,
                      string revOp, list<SchedReadWrite> sched> {
 
   def "" : VOP3_Pseudo <outs, ins, pattern, opName>,
            VOP2_REV<revOp#"_e64", !eq(revOp, opName)> {
+    let Defs = !if(defExec, [EXEC], []);
     let SchedRW = sched;
   }
 
   def _si : VOP3_Real_si <op.SI3, outs, ins, asm, opName>,
             VOP3DisableFields<1, 0, HasMods> {
     let Defs = !if(defExec, [EXEC], []);
     let SchedRW = sched;
   }

 }
 
 multiclass VOPC_m <vopc op, dag ins, string op_asm, list<dag> pattern,
                    string opName, bit DefExec, VOPProfile p,
                    list<SchedReadWrite> sched,
                    string revOpName = "", string asm = opName#"_e32 "#op_asm,
                    string alias_asm = opName#" "#op_asm> {
   def "" : VOPC_Pseudo <ins, pattern, opName> {
+    let Defs = !if(DefExec, [VCC, EXEC], [VCC]);
     let SchedRW = sched;
   }
 
   let AssemblerPredicates = [isSICI] in {
     def _si : VOPC<op.SI, ins, asm, []>,
               SIMCInstr <opName#"_e32", SISubtarget.SI> {
       let Defs = !if(DefExec, [VCC, EXEC], [VCC]);
       let hasSideEffects = DefExec;