[CommandLine] Provide parser<unsigned long> instantiation to allow cl::opt<uint64_t> on LP64 platforms

Summary:
And migrate opt<unsigned long long> to opt<uint64_t>

Fixes PR19665

Differential Revision: https://reviews.llvm.org/D60933

llvm-svn: 359068
diff --git a/llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
index 71eaf46..254e9ec 100644
--- a/llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp
@@ -124,10 +124,10 @@
 // is accessed. The shadow mapping looks like:
 //    Shadow = (Mem >> scale) + offset
 
-static cl::opt<unsigned long long> ClMappingOffset(
-    "hwasan-mapping-offset",
-    cl::desc("HWASan shadow mapping offset [EXPERIMENTAL]"), cl::Hidden,
-    cl::init(0));
+static cl::opt<uint64_t>
+    ClMappingOffset("hwasan-mapping-offset",
+                    cl::desc("HWASan shadow mapping offset [EXPERIMENTAL]"),
+                    cl::Hidden, cl::init(0));
 
 static cl::opt<bool>
     ClWithIfunc("hwasan-with-ifunc",