Introduce a limit on the depth of the template instantiation backtrace
we will print with each error that occurs during template
instantiation. When the backtrace is longer than that, we will print
N/2 of the innermost backtrace entries and N/2 of the outermost
backtrace entries, then skip the middle entries with a note such as:
note: suppressed 2 template instantiation contexts; use
-ftemplate-backtrace-limit=N to change the number of template
instantiation entries shown
This should eliminate some excessively long backtraces that aren't
providing any value.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101882 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index d9df471..4653551 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1079,6 +1079,12 @@
CmdArgs.push_back(A->getValue(Args));
else
CmdArgs.push_back("19");
+
+ CmdArgs.push_back("-ftemplate-backtrace-limit");
+ if (Arg *A = Args.getLastArg(options::OPT_ftemplate_backtrace_limit_EQ))
+ CmdArgs.push_back(A->getValue(Args));
+ else
+ CmdArgs.push_back("10");
// Pass -fmessage-length=.
CmdArgs.push_back("-fmessage-length");