[NFC] SILGen: Inverted control flow.

Used the main body of the function for the "normal" path.

Author: nate-chandler

lib/SILGen/SILGenDecl.cpp

@@ -805,22 +805,22 @@ class LetValueInitialization : public Initialization {
           MarkMustCheckInst::CheckKind::ConsumableAndAssignable);
     }
 
-    // Otherwise, if we do not have a no implicit copy variable, just follow
-    // the "normal path": perform a lexical borrow if the lifetime is lexical.
-    if (!vd->isNoImplicitCopy()) {
-      if (SGF.F.getLifetime(vd, value->getType()).isLexical())
-        return SGF.B.createBeginBorrow(PrologueLoc, value, /*isLexical*/ true);
-      else
-        return value;
-    }
-
     // If we have a no implicit copy lexical, emit the instruction stream so
     // that the move checker knows to check this variable.
-    value = SGF.B.createMoveValue(PrologueLoc, value, /*IisLexical*/ true);
-    value = SGF.B.createOwnedCopyableToMoveOnlyWrapperValue(PrologueLoc, value);
-    return SGF.B.createMarkMustCheckInst(
-        PrologueLoc, value,
-        MarkMustCheckInst::CheckKind::ConsumableAndAssignable);
+    if (vd->isNoImplicitCopy()) {
+      value = SGF.B.createMoveValue(PrologueLoc, value, /*IisLexical*/ true);
+      value = SGF.B.createOwnedCopyableToMoveOnlyWrapperValue(PrologueLoc, value);
+      return SGF.B.createMarkMustCheckInst(
+          PrologueLoc, value,
+          MarkMustCheckInst::CheckKind::ConsumableAndAssignable);
+    }
+
+    // Otherwise, if we do not have a no implicit copy variable, just follow
+    // the "normal path": perform a lexical borrow if the lifetime is lexical.
+    if (SGF.F.getLifetime(vd, value->getType()).isLexical())
+      return SGF.B.createBeginBorrow(PrologueLoc, value, /*isLexical*/ true);
+    else
+      return value;
   }
 
   void bindValue(SILValue value, SILGenFunction &SGF, bool wasPlusOne,