[PATCH] X86: Implement the vectorcall calling convention

[David Majnemer]

================
Comment at: lib/IR/Mangler.cpp:121
@@ +120,3 @@
+  const Function *MSFunc = dyn_cast<Function>(GV);
+  if (!Name.empty() && Name[0] == '\01')
+    MSFunc = nullptr; // Don't mangle when \01 is present.
----------------
`Name.startsWith("\01")`

http://reviews.llvm.org/D5943