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

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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
This commit is contained in:
Richard Smith
2011-11-21 19:36:32 +00:00
parent aa2a00db35
commit 9a56882e53
9 changed files with 40 additions and 12 deletions
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8
clang/lib/Frontend/CompilerInvocation.cpp
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@@ -789,6 +789,10 @@ static void LangOptsToArgs(const LangOptions &Opts,
Res.push_back("-ftemplate-depth");
Res.push_back(llvm::utostr(Opts.InstantiationDepth));
}
if (Opts.ConstexprCallDepth != DefaultLangOpts.ConstexprCallDepth) {
Res.push_back("-fconstexpr-depth");
Res.push_back(llvm::utostr(Opts.ConstexprCallDepth));
}
if (!Opts.ObjCConstantStringClass.empty()) {
Res.push_back("-fconstant-string-class");
Res.push_back(Opts.ObjCConstantStringClass);
@@ -1777,7 +1781,9 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
Diags);
Diags);
Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
Diags);
Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy,
0, Diags);