https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90944
--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
The following fixes the issue. Does anyone have a better suggestion?
Index: combine.c
===================================================================
--- combine.c (revision 272620)
+++ combine.c (working copy)
@@ -15051,10 +15051,14 @@ make_more_copies (void)
}
}
+int pass_combine_count;
+
/* Try combining insns through substitution. */
static unsigned int
rest_of_handle_combine (void)
{
+ pass_combine_count++;
+
make_more_copies ();
df_set_flags (DF_LR_RUN_DCE + DF_DEFER_INSN_RESCAN);
Index: passes.c
===================================================================
--- passes.c (revision 272620)
+++ passes.c (working copy)
@@ -342,6 +342,8 @@ rest_of_type_compilation (tree type, int
+extern int pass_combine_count;
+
void
pass_manager::
finish_optimization_passes (void)
@@ -359,7 +361,7 @@ finish_optimization_passes (void)
dumps->dump_finish (pass_profile_1->static_pass_number);
}
- if (optimize > 0)
+ if (optimize > 0 && pass_combine_count > 0)
{
dumps->dump_start (pass_combine_1->static_pass_number, NULL);
print_combine_total_stats ();
