Fix concerns

Author: AZero13

llvm/lib/Target/ARM/Utils/ARMBaseInfo.h

@@ -47,7 +47,9 @@ enum CondCodes { // Meaning (integer)          Meaning (floating-point)
 
 inline static CondCodes getOppositeCondition(CondCodes CC) {
   // To reverse a condition it's necessary to only invert the low bit:
-
+  // Note that unlike in AArch64, flipping the bottom bit for AL is not a valid
+  // predicate.
+  assert(CC != AL && "AL has no opposite condition");
   return static_cast<CondCodes>(static_cast<unsigned>(CC) ^ 0x1);
 }
 

llvm/lib/Target/X86/X86InstrInfo.h

@@ -87,7 +87,6 @@ unsigned getNonNDVariant(unsigned Opc);
 /// e.g. turning COND_E to COND_NE.
 CondCode GetOppositeBranchCondition(CondCode CC) {
   // To reverse a condition it's necessary to only invert the low bit:
-
   return static_cast<CondCode>(static_cast<unsigned>(CC) ^ 0x1);
 }