Add driver arguments -ftemplate-depth=N and -fconstexpr-depth=N, with the same

semantics and defaults as the corresponding g++ arguments. The historical g++
argument -ftemplate-depth-N is kept for compatibility, but modern g++ versions
no longer document that option.

Add -cc1 argument -fconstexpr-depth N to implement the corresponding
functionality.

The -ftemplate-depth=N part of this fixes PR9890.

llvm-svn: 145045

1 files changed, 7 insertions, 1 deletions

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 4229987f523..918b4551c57 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -1619,11 +1619,17 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     }
   }
 
-  if (Arg *A = Args.getLastArg(options::OPT_ftemplate_depth_)) {
+  if (Arg *A = Args.getLastArg(options::OPT_ftemplate_depth_,
+                               options::OPT_ftemplate_depth_EQ)) {
     CmdArgs.push_back("-ftemplate-depth");
     CmdArgs.push_back(A->getValue(Args));
   }
 
+  if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_depth_EQ)) {
+    CmdArgs.push_back("-fconstexpr-depth");
+    CmdArgs.push_back(A->getValue(Args));
+  }
+
   if (Arg *A = Args.getLastArg(options::OPT_Wlarge_by_value_copy_EQ,
                                options::OPT_Wlarge_by_value_copy_def)) {
     CmdArgs.push_back("-Wlarge-by-value-copy");