[PATCH] D20434: [MCExpr] avoid UB via negation of INT_MIN

[David Majnemer via llvm-commits]

majnemer added a subscriber: majnemer.

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Comment at: lib/MC/MCExpr.cpp:669-673
@@ -668,1 +668,7 @@
+      // minimum constant.
+      int64_t ValConst = Value.getConstant();
+      if (ValConst != INT64_MIN)
+        ValConst = -ValConst;
+      
+      Res = MCValue::get(Value.getSymB(), Value.getSymA(), ValConst);
       break;
----------------
I'd just go with:
      Res = MCValue::get(Value.getSymB(), Value.getSymA(),
                         -(uint64_t)Value.getConstant());


http://reviews.llvm.org/D20434