[PATCH] Add explicit Win64 and System V calling conventions to the x86_64 backend

[Anton Korobeynikov]

================
Comment at: lib/Target/X86/X86FastISel.cpp:724
@@ -722,3 +723,3 @@
 
-  if (Subtarget->isTargetWin64())
+  if (Subtarget->isTargetWin64() && CC != CallingConv::X86_64_C)
     return false;
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Maybe we can introduce the notion of "native" CC given a subtarget and make use of checks here?


http://llvm-reviews.chandlerc.com/D729