[flang] Add -f[no-]honor-infinities and -menable-no-infs

Only add the option processing and store the result. No attributes are
added to FIR yet.

This patch follows Clang in forwarding -fno-honor-infinities as
-menable-no-infs.

Reviewed By: kiranchandramohan awarzynski vzakhari

Differential Revision: https://reviews.llvm.org/D137072

1 files changed, 6 insertions, 0 deletions

diff --git a/flang/lib/Frontend/CompilerInvocation.cpp b/flang/lib/Frontend/CompilerInvocation.cpp
index 3a64086..10c7316 100644
--- a/flang/lib/Frontend/CompilerInvocation.cpp
+++ b/flang/lib/Frontend/CompilerInvocation.cpp
@@ -691,6 +691,12 @@ static bool parseFloatingPointArgs(CompilerInvocation &invoc,
     opts.setFPContractMode(fpContractMode);
   }
 
+  if (const llvm::opt::Arg *a =
+          args.getLastArg(clang::driver::options::OPT_menable_no_infinities)) {
+    diags.Report(diagUnimplemented) << a->getOption().getName();
+    opts.NoHonorInfs = true;
+  }
+
   return true;
 }