On Thu, Mar 14, 2019 at 05:14:49PM -0300, Alexandre Oliva wrote: > P0732R2 / C++ 2a introduce class literals as template parameters. The > front-end uses VAR_DECLs constructed from such literals to bind the > template PARM_DECLs, but dwarf2out.c used to reject such VAR_DECLs. > > Taking DECL_INITIAL from such VAR_DECLs enables the generation of > DW_AT_const_value for them, at least when the class literal can > actually be represented as such. > > Regstrapped on x86_64- and i686-linux-gnu. Ok to install? > > > for gcc/ChangeLog > > PR c++/88534 > PR c++/88537 > * dwarf2out.c (generic_parameter_die): Follow DECL_INITIAL of > VAR_DECL args. > > for gcc/ChangeLog > > PR c++/88534 > PR c++/88537 > * g++.dg/cpp2a/pr88534.C: New. > * g++.dg/cpp2a/pr88537.C: New. > --- > gcc/dwarf2out.c | 7 ++++ > gcc/testsuite/g++.dg/cpp2a/pr88534.C | 65 > ++++++++++++++++++++++++++++++++++ > gcc/testsuite/g++.dg/cpp2a/pr88537.C | 16 ++++++++ > 3 files changed, 88 insertions(+) > create mode 100644 gcc/testsuite/g++.dg/cpp2a/pr88534.C > create mode 100644 gcc/testsuite/g++.dg/cpp2a/pr88537.C > > diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c > index 8305555681447..478d9b9b289b1 100644 > --- a/gcc/dwarf2out.c > +++ b/gcc/dwarf2out.c > @@ -13601,6 +13601,13 @@ generic_parameter_die (tree parm, tree arg, > dw_die_ref tmpl_die = NULL; > const char *name = NULL; > > + /* C++2a accepts class literals as template parameters, and var > + decls with initializers represent them. The VAR_DECLs would be > + rejected, but we can take the DECL_INITIAL constructor and > + attempt to expand it. */ > + if (TREE_CODE (arg) == VAR_DECL)
You can use VAR_P for this. Marek
