Fix speling in comments. NFC.

include/llvm/ADT/DenseMap.h

@@ -954,7 +954,7 @@ public:
           std::swap(*LHSB, *RHSB);
           continue;
         }
-        // Swap separately and handle any assymetry.
+        // Swap separately and handle any asymmetry.
         std::swap(LHSB->getFirst(), RHSB->getFirst());
         if (hasLHSValue) {
           ::new (&RHSB->getSecond()) ValueT(std::move(LHSB->getSecond()));

lib/Analysis/GlobalsModRef.cpp

@@ -44,7 +44,7 @@ STATISTIC(NumIndirectGlobalVars, "Number of indirect global objects");
 // An option to enable unsafe alias results from the GlobalsModRef analysis.
 // When enabled, GlobalsModRef will provide no-alias results which in extremely
 // rare cases may not be conservatively correct. In particular, in the face of
-// transforms which cause assymetry between how effective getUnderlyingObject
+// transforms which cause asymmetry between how effective getUnderlyingObject
 // is for two pointers, it may produce incorrect results.
 //
 // These unsafe results have been returned by GMR for many years without

lib/Target/AArch64/AArch64FrameLowering.cpp

@@ -1649,7 +1649,7 @@ void AArch64FrameLowering::emitEpilogue(MachineFunction &MF,
     // If the prologue didn't contain any SEH opcodes and didn't set the
     // MF.hasWinCFI() flag, assume the epilogue won't either, and skip the
     // EpilogStart - to avoid generating CFI for functions that don't need it.
-    // (And as we didn't generate any prologue at all, it would be assymetrical
+    // (And as we didn't generate any prologue at all, it would be asymmetrical
     // to the epilogue.) By the end of the function, we assert that
     // HasWinCFI is equal to MF.hasWinCFI(), to verify this assumption.
     HasWinCFI = true;