[PATCH] [ms] Implement codegen for __leave.

[Reid Kleckner]

lgtm

Thanks!


================
Comment at: lib/CodeGen/CGException.cpp:1717-1721
@@ +1716,7 @@
+
+    if (!TryExit.getBlock()->use_empty()) {
+      EmitBlock(TryExit.getBlock(), /*IsFinished=*/true);
+    } else {
+      delete TryExit.getBlock();
+    }
+    SEHTryEpilogueStack.pop_back();
----------------
LLVM tends to elide these braces. *shrug*

http://reviews.llvm.org/D7575

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