[PATCH] D19376: [MC] Create unique .pdata sections for every .text section

[Reid Kleckner via llvm-commits]

rnk created this revision.
rnk added reviewers: majnemer, rafael.
rnk added a subscriber: llvm-commits.

This adds a unique ID to the COFF section uniquing map, similar to the
one we have for ELF.  The unique id is not currently exposed via the
assembler because we don't have a use case for it yet. Users generally
create .pdata with the .seh_* family of directives, and the assembler
internally needs to produce .pdata and .xdata sections corresponding to
the code section.

The map to remember which .pdata section to use for a given .text
section is maintained in the MCContext, since this is something the
assembler needs to maintain to implement .seh_* directives. I'm open to
suggestisons for a better home.

http://reviews.llvm.org/D19376

Files:
  include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
  include/llvm/MC/MCContext.h
  include/llvm/MC/MCWinEH.h
  lib/CodeGen/AsmPrinter/WinException.cpp
  lib/CodeGen/TargetLoweringObjectFileImpl.cpp
  lib/MC/MCAsmStreamer.cpp
  lib/MC/MCContext.cpp
  lib/MC/MCParser/COFFAsmParser.cpp
  lib/MC/MCStreamer.cpp
  lib/MC/MCWin64EH.cpp
  lib/MC/MCWinEH.cpp
  lib/Target/X86/X86TargetObjectFile.cpp
  test/MC/COFF/seh-section-2.s
  test/MC/COFF/seh-section.s

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