[PATCH] [Stackmap]Add AnyReg calling convention support for patchpoint intrinsic.

[Andrew Trick]

================
Comment at: lib/Target/X86/X86CallingConv.h:25-26
@@ +24,4 @@
+                                ISD::ArgFlagsTy, CCState &) {
+  assert(false && "The AnyReg calling convention is only supported by the " \
+                  "stackmap and patchpoint intrinsics.");
+  // gracefully fallback to X86 C calling convention on Release builds.
----------------
assert(false is not an accepted idiom. We use llvm_unreachable in this case.


http://llvm-reviews.chandlerc.com/D2009