[PATCH] D31166: Encapsulate FPOptions and use it consistently

[Adam Nemet via Phabricator via cfe-commits]

anemet created this revision.

Sema holds the current FPOptions which is adjusted by 'pragma STDC
FP_CONTRACT'.  This then gets propagated into expression nodes as they are
built.

This encapsulates FPOptions so that this propagation happens opaquely rather
than directly with the fp_contractable on/off bit.  This allows controlled
transitioning of fp_contractable to a ternary value (off, on, fast).  It will
also allow adding more fast-math flags later.

This is toward moving fp-contraction=fast from an LLVM TargetOption to a
FastMathFlag in order to fix PR25721.


https://reviews.llvm.org/D31166

Files:
  include/clang/AST/Expr.h
  include/clang/AST/ExprCXX.h
  include/clang/Basic/LangOptions.h
  include/clang/Sema/Sema.h
  lib/AST/ASTImporter.cpp
  lib/Analysis/BodyFarm.cpp
  lib/CodeGen/CGExprScalar.cpp
  lib/CodeGen/CGObjC.cpp
  lib/CodeGen/CGStmtOpenMP.cpp
  lib/Frontend/Rewrite/RewriteModernObjC.cpp
  lib/Frontend/Rewrite/RewriteObjC.cpp
  lib/Sema/SemaAttr.cpp
  lib/Sema/SemaDeclCXX.cpp
  lib/Sema/SemaExpr.cpp
  lib/Sema/SemaExprCXX.cpp
  lib/Sema/SemaOverload.cpp
  lib/Sema/SemaPseudoObject.cpp
  lib/Sema/TreeTransform.h
  lib/Serialization/ASTReader.cpp
  lib/Serialization/ASTReaderStmt.cpp
  lib/Serialization/ASTWriter.cpp
  lib/Serialization/ASTWriterStmt.cpp

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