[PATCH] D21614: [codeview] Add DISubprogram::ThisAdjustment

[Reid Kleckner via llvm-commits]

rnk created this revision.
rnk added reviewers: aprantl, dexonsmith.
rnk added subscribers: llvm-commits, amccarth, aaboud.

This represents the adjustment applied to the implicit 'this' parameter
in the prologue of a virtual method in the MS C++ ABI. The adjustment is
always zero unless multiple inheritance is involved.

This increases the size of DISubprogram by 8 bytes, unfortunately. The
adjustment really is a signed 32-bit integer. If this size increase is
too much, we could probably win it back by splitting out a subclass with
info specific to virtual methods (virtuality, vindex, thisadjustment,
containingType).

http://reviews.llvm.org/D21614

Files:
  include/llvm/IR/DIBuilder.h
  include/llvm/IR/DebugInfoMetadata.h
  lib/AsmParser/LLParser.cpp
  lib/Bitcode/Reader/BitcodeReader.cpp
  lib/Bitcode/Writer/BitcodeWriter.cpp
  lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
  lib/IR/AsmWriter.cpp
  lib/IR/DIBuilder.cpp
  lib/IR/DebugInfoMetadata.cpp
  lib/IR/LLVMContextImpl.h
  test/DebugInfo/COFF/virtual-methods.ll
  unittests/IR/MetadataTest.cpp

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