[PATCH] D37035: Implement __builtin_LINE() et. al. to support source location capture.

[Eric Fiselier via Phabricator via cfe-commits]

EricWF created this revision.

This patch implements the source location builtins `__builtin_LINE(), `__builtin_FUNCTION()`, `__builtin_FILE()` and `__builtin_COLUMN()`. These builtins are needed to implement [`std::experimental::source_location`](https://rawgit.com/cplusplus/fundamentals-ts/v2/main.html#reflection.src_loc.creation).

With the exception of `__builtin_COLUMN`, GCC also implements these builtins, and Clangs behavior is intended to match as closely as possible.


https://reviews.llvm.org/D37035

Files:
  docs/LanguageExtensions.rst
  include/clang/AST/Expr.h
  include/clang/AST/RecursiveASTVisitor.h
  include/clang/AST/Stmt.h
  include/clang/Basic/StmtNodes.td
  include/clang/Basic/TokenKinds.def
  include/clang/Sema/Sema.h
  include/clang/Serialization/ASTBitCodes.h
  lib/AST/Expr.cpp
  lib/AST/ExprClassification.cpp
  lib/AST/ExprConstant.cpp
  lib/AST/ItaniumMangle.cpp
  lib/AST/StmtPrinter.cpp
  lib/AST/StmtProfile.cpp
  lib/CodeGen/CGExprAgg.cpp
  lib/CodeGen/CGExprConstant.cpp
  lib/CodeGen/CGExprScalar.cpp
  lib/Parse/ParseExpr.cpp
  lib/Sema/Sema.cpp
  lib/Sema/SemaDeclCXX.cpp
  lib/Sema/SemaExceptionSpec.cpp
  lib/Sema/SemaExpr.cpp
  lib/Sema/SemaInit.cpp
  lib/Sema/TreeTransform.h
  lib/Serialization/ASTReaderStmt.cpp
  lib/Serialization/ASTWriterStmt.cpp
  lib/StaticAnalyzer/Core/ExprEngine.cpp
  test/CodeGenCXX/builtin_FUNCTION.cpp
  test/CodeGenCXX/builtin_LINE.cpp
  test/CodeGenCXX/debug-info-line.cpp
  test/Parser/builtin_source_location.c
  test/Sema/source_location.c
  test/SemaCXX/Inputs/source-location-file.h
  test/SemaCXX/source_location.cpp

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