OpenCL C: Add support for a set of floating point

arithmetic relaxation flags:

-cl-no-signed-zeros
-cl-unsafe-math-optimizations
-cl-finite-math-only
-cl-fast-relaxed-math

Propagate the info to FP instruction flags as well
as function attributes where they are available.

llvm-svn: 223928

1 files changed, 9 insertions, 4 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 5909594..610bfff 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -417,11 +417,13 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
   Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
-                       Args.hasArg(OPT_cl_finite_math_only)||
+                       Args.hasArg(OPT_cl_finite_math_only) ||
                        Args.hasArg(OPT_cl_fast_relaxed_math));
   Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
-                       Args.hasArg(OPT_cl_finite_math_only)||
+                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
+                       Args.hasArg(OPT_cl_finite_math_only) ||
                        Args.hasArg(OPT_cl_fast_relaxed_math));
+  Opts.NoSignedZeros = Args.hasArg(OPT_cl_no_signed_zeros);
   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
   Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
@@ -1598,8 +1600,11 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   // inlining enabled.
   Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
 
-  Opts.FastMath = Args.hasArg(OPT_ffast_math);
-  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
+  Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
+      Args.hasArg(OPT_cl_fast_relaxed_math);
+  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
+      Args.hasArg(OPT_cl_finite_math_only) ||
+      Args.hasArg(OPT_cl_fast_relaxed_math);
 
   Opts.RetainCommentsFromSystemHeaders =
       Args.hasArg(OPT_fretain_comments_from_system_headers);