re PR debug/88878 (.debug_pubnames/types empty with -flto)

2019-02-27  Richard Biener  <rguenther@suse.de>

	PR debug/88878
	* dwarf2out.c (use_debug_types): Disable when in_lto_p.

From-SVN: r269253

gcc/ChangeLog

 2019-02-27  Richard Biener  <rguenther@suse.de>
 
+	PR debug/88878
+	* dwarf2out.c (use_debug_types): Disable when in_lto_p.
+
+2019-02-27  Richard Biener  <rguenther@suse.de>
+
 	* passes.c (should_skip_pass_p): Do not skip cgraph-edge
 	building.
 

gcc/dwarf2out.c

@@ -2914,9 +2914,13 @@ const struct gcc_debug_hooks dwarf2_lineno_debug_hooks =
    separate comdat sections since the linker will then be able to
    remove duplicates.  But not all tools support .debug_types sections
    yet.  For Dwarf V5 or higher .debug_types doesn't exist any more,
-   it is DW_UT_type unit type in .debug_info section.  */
+   it is DW_UT_type unit type in .debug_info section.  For late LTO
+   debug there should be almost no types emitted so avoid enabling
+   -fdebug-types-section there.  */
 
-#define use_debug_types (dwarf_version >= 4 && flag_debug_types_section)
+#define use_debug_types (dwarf_version >= 4 \
+			 && flag_debug_types_section \
+			 && !in_lto_p)
 
 /* Various DIE's use offsets relative to the beginning of the
    .debug_info section to refer to each other.  */