[PATCH] Fix an issue with certain constants as live values in patchpoints.

[Juergen Ributzka]

LGTM

================
Comment at: lib/CodeGen/StackMaps.cpp:225
@@ -224,1 +224,3 @@
       I->LocType = Location::ConstantIndex;
+      // ConstPool is intentionally a MapVector of uint64_ts (as
+      // opposed to int64_ts).  We should never be in a situation
----------------
uint64_ts -> 'uint64_t's

================
Comment at: lib/CodeGen/StackMaps.cpp:230
@@ -225,1 +229,3 @@
+      // (uint64_t)0 and (uint64_t)-1.  They can be and are
+      // represented using 32 bit integers.
       auto Result = ConstPool.insert(std::make_pair(I->Offset, I->Offset));
----------------
Maybe we should add an assert here to make sure this won't happen in the future.

http://reviews.llvm.org/D6101