Revert "[CLANG][PATCH][FPEnv] Add support for option -ffp-eval-method and extend #pragma float_control similarly"

The intent of this patch is to add support of -fp-model=[source|double|extended] to allow
the compiler to use a wider type for intermediate floating point calculations. As a side
effect to that, the value of FLT_EVAL_METHOD is changed according to the pragma
float_control.
Unfortunately some issue was uncovered with this change in preprocessing. See details in
https://reviews.llvm.org/D93769 . We are therefore reverting this patch until we find a way
to reconcile the value of FLT_EVAL_METHOD, the pragma and the -E flow.

This reverts commit 66ddac22e2a7f268e91c26d694112970dfa607ae.

1 files changed, 1 insertions, 6 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 9f891f2..64800b1 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -4245,13 +4245,8 @@ static bool ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
   // Always avoid lexing editor placeholders when we're just running the
   // preprocessor as we never want to emit the
   // "editor placeholder in source file" error in PP only mode.
-  // Certain predefined macros which depend upon semantic processing,
-  // for example __FLT_EVAL_METHOD__, are not expanded in PP mode, they
-  // appear in the preprocessed output as an unexpanded macro name.
-  if (isStrictlyPreprocessorAction(Action)) {
+  if (isStrictlyPreprocessorAction(Action))
     Opts.LexEditorPlaceholders = false;
-    Opts.LexExpandSpecialBuiltins = false;
-  }
 
   return Diags.getNumErrors() == NumErrorsBefore;
 }