[X86][NFC]Remove dead code in IfConversion.cpp

[XinWang10]

Summary

In line 544, if we go in to isFalse, then the Kind could be ICTriangleFalse and isRev must be False, so we never go into the true branch in line 545, better to remove it.

[skan]

LGTM

[pengfei]

llvm/lib/CodeGen/IfConversion.cpp

544–549

How about:

[XinWang10]

• resolve comment

llvm/lib/CodeGen/IfConversion.cpp

while (!Tokens.empty()) {
         if (isRev)
           LLVM_DEBUG(dbgs() << " rev");
         LLVM_DEBUG(dbgs() << "): " << printMBBReference(*BBI.BB)
                           << " (T:" << BBI.TrueBB->getNumber()
                           << ",F:" << BBI.FalseBB->getNumber() << ") ");
         RetVal = IfConvertTriangle(BBI, Kind);
         LLVM_DEBUG(dbgs() << (RetVal ? "succeeded!" : "failed!") << "\n");
         if (RetVal) {
           if (isFalse) {
-            if (isRev) ++NumTriangleFRev;
-            else       ++NumTriangleFalse;
+            ++NumTriangleFalse;
           } else {
             if (isRev) ++NumTriangleRev;
             else       ++NumTriangle;
           }
         }
         break;
       }
       case ICDiamond:
         if (DisableDiamond) break;
         LLVM_DEBUG(dbgs() << "Ifcvt (Diamond): " << printMBBReference(*BBI.BB)
                           << " (T:" << BBI.TrueBB->getNumber()
                           << ",F:" << BBI.FalseBB->getNumber() << ") ");