[PATCH] D21141: [DebugInfo] Add calling conventions to DISubroutineType

[Reid Kleckner via cfe-commits]

rnk created this revision.
rnk added reviewers: aprantl, dblaikie.
rnk added a subscriber: cfe-commits.
rnk added a dependency: D21114: [DebugInfo] Add calling convention support for DWARF and CodeView.

This should have been a very simple change, but it was greatly
complicated by the construction of new Decls during IR generation.

In particular, we reconstruct the AST function type in order to get the
implicit 'this' parameter into C++ method types.

We also have to worry about FunctionDecls whose types are not
FunctionTypes because CGBlocks.cpp constructs some dummy FunctionDecls
with 'void' type.

Depends on D21114

http://reviews.llvm.org/D21141

Files:
  lib/CodeGen/CGDebugInfo.cpp
  lib/CodeGen/CodeGenFunction.cpp
  test/CodeGenCXX/debug-info-calling-conventions.cpp

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