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, 3 insertions, 3 deletions

diff --git a/clang/lib/Sema/SemaAttr.cpp b/clang/lib/Sema/SemaAttr.cpp
index bad9e702426..992eac9019f 100644
--- a/clang/lib/Sema/SemaAttr.cpp
+++ b/clang/lib/Sema/SemaAttr.cpp
@@ -450,13 +450,13 @@ void Sema::ActOnPragmaVisibility(const IdentifierInfo* VisType,
 void Sema::ActOnPragmaFPContract(tok::OnOffSwitch OOS) {
   switch (OOS) {
   case tok::OOS_ON:
-    FPFeatures.fp_contract = 1;
+    FPFeatures.setFPContractable(true);
     break;
   case tok::OOS_OFF:
-    FPFeatures.fp_contract = 0; 
+    FPFeatures.setFPContractable(false);
     break;
   case tok::OOS_DEFAULT:
-    FPFeatures.fp_contract = getLangOpts().DefaultFPContract;
+    FPFeatures.setFPContractable(getLangOpts().DefaultFPContract);
     break;
   }
 }