I am testing the following patch to avoid forcing DIEs for a type context
for method clones late via limbo processing. Instead hang them off
comp_unit_die if there is no early DIE for the function.
One question is whether the comment "If we're a nested function"
matches up with the decl_function_context (decl) check or whether
we really wanted to check DECL_CONTEXT (decl) == FUNCTION_DECL
which would have made this particular case not match (DECL_CONTEXT
is a RECORD_TYPE which context is a FUNCTION_DECL).
Another option is of course to make clones not inherit
DECL_CONTEXT from the cloned function (for an artificial
instance the "context" is somewhat arbitrary since it isn't
going to be found by lookup). In fact I long wanted to
represent clones as artificial containers for an
inline instance of the cloned function...
LTO bootstrap and regtest running on x86_64-unknown-linux-gnu.
If that succeeds I'm going to apply it as a stop-gap measure to
make Firefox build again with LTO but I'm open to revising it.
Richard.
2018-07-24 Richard Biener <rguent...@suse.de>
PR debug/86654
* dwarf2out.c (dwarf2out_decl): Do not handle nested functions
special wrt context_die late.
Index: gcc/dwarf2out.c
===================================================================
--- gcc/dwarf2out.c (revision 262948)
+++ gcc/dwarf2out.c (working copy)
@@ -26702,8 +26702,11 @@ dwarf2out_decl (tree decl)
case FUNCTION_DECL:
/* If we're a nested function, initially use a parent of NULL; if we're
a plain function, this will be fixed up in decls_for_scope. If
- we're a method, it will be ignored, since we already have a DIE. */
- if (decl_function_context (decl)
+ we're a method, it will be ignored, since we already have a DIE.
+ Avoid doing this late though since clones of class methods may
+ otherwise end up creating type DIEs late. */
+ if (early_dwarf
+ && decl_function_context (decl)
/* But if we're in terse mode, we don't care about scope. */
&& debug_info_level > DINFO_LEVEL_TERSE)
context_die = NULL;
