Encapsulate FPOptions and use it consistently

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.

Differential Revision: https://reviews.llvm.org/D31166

llvm-svn: 298877

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index e4474a84179..d2907bebbaa 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -4015,7 +4015,7 @@ void ASTWriter::WriteDeclContextVisibleUpdate(const DeclContext *DC) {
 
 /// \brief Write an FP_PRAGMA_OPTIONS block for the given FPOptions.
 void ASTWriter::WriteFPPragmaOptions(const FPOptions &Opts) {
-  RecordData::value_type Record[] = {Opts.fp_contract};
+  RecordData::value_type Record[] = {Opts.getInt()};
   Stream.EmitRecord(FP_PRAGMA_OPTIONS, Record);
 }