Check TypeIdx

Author: HolyMolyCowMan

llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp

@@ -3066,13 +3066,11 @@ LegalizerHelper::widenScalar(MachineInstr &MI, unsigned TypeIdx, LLT WideTy) {
     return Legalized;
 
   case TargetOpcode::G_FPEXT:
-    Observer.changingInstr(MI);
-
-    if (TypeIdx == 0)
-      widenScalarDst(MI, WideTy, 0, TargetOpcode::G_FPTRUNC);
-    else
-      widenScalarSrc(MI, WideTy, 1, TargetOpcode::G_FPEXT);
+    if (TypeIdx != 1)
+      return UnableToLegalize;
 
+    Observer.changingInstr(MI);
+    widenScalarSrc(MI, WideTy, 1, TargetOpcode::G_FPEXT);
     Observer.changedInstr(MI);
     return Legalized;
   case TargetOpcode::G_FPTOSI: