block literal irgen: several improvements on naming block
literal helper functions. All helper functions (global
and locals) use block_invoke as their prefix. Local literal
helper names are prefixed by their enclosing mangled function
names. Blocks in non-local initializers (e.g. a global variable 
or a C++11 field) are prefixed by their mangled variable name. 
The descriminator number added to end of the name starts off 
with blank (for first block) and _<N> (for the N+2-th block).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159206 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index ceffbd4..6859394 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -28,7 +28,7 @@
 using namespace clang;
 using namespace CodeGen;
 
-CodeGenFunction::CodeGenFunction(CodeGenModule &cgm)
+CodeGenFunction::CodeGenFunction(CodeGenModule &cgm, bool suppressNewContext)
   : CodeGenTypeCache(cgm), CGM(cgm),
     Target(CGM.getContext().getTargetInfo()),
     Builder(cgm.getModule().getContext()),
@@ -42,7 +42,8 @@
     TerminateHandler(0), TrapBB(0) {
 
   CatchUndefined = getContext().getLangOpts().CatchUndefined;
-  CGM.getCXXABI().getMangleContext().startNewFunction();
+  if (!suppressNewContext)
+    CGM.getCXXABI().getMangleContext().startNewFunction();
 }
 
 CodeGenFunction::~CodeGenFunction() {