commit 76c9e0986c42bd789f8734106a86c144f2b5e14c
author Sanjay Patel <spatel@rotateright.com> Fri Jan 23 16:40:50 2015 +0000
committer Sanjay Patel <spatel@rotateright.com> Fri Jan 23 16:40:50 2015 +0000
tree ef6d6a0882acfa200c46b841329c519524945579
parent 6ee521c7eb8b58b5b1faf471bf03da434440bcf0

Process the -fno-signed-zeros optimization flag (PR20870)

The driver currently accepts but ignores the -fno-signed-zeros flag. 
This patch passes the flag through and enables 'nsz' fast-math-flag 
generation in IR.

The existing OpenCL flag for the same functionality is made into an
alias here. It may be removed in a subsequent patch.

This should resolve bug 20870 ( http://llvm.org/bugs/show_bug.cgi?id=20870 );
patches for the optimizer were checked in at:
http://llvm.org/viewvc/llvm-project?view=revision&revision=225050
http://llvm.org/viewvc/llvm-project?view=revision&revision=224583

Differential Revision: http://reviews.llvm.org/D6873

llvm-svn: 226915

clang/lib/Frontend/CompilerInvocation.cpp

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index dd1a606..ab5c8f8 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -441,7 +441,7 @@
                        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.NoSignedZeros = Args.hasArg(OPT_fno_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);