diff options
Diffstat (limited to 'gcc/lra-assigns.c')
| -rw-r--r-- | gcc/lra-assigns.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/gcc/lra-assigns.c b/gcc/lra-assigns.c index f7bb86b..34b4a11 100644 --- a/gcc/lra-assigns.c +++ b/gcc/lra-assigns.c @@ -1447,6 +1447,7 @@ lra_assign (void) bitmap_head insns_to_process; bool no_spills_p; int max_regno = max_reg_num (); + unsigned int call_used_reg_crosses_call = 0; timevar_push (TV_LRA_ASSIGN); init_lives (); @@ -1459,14 +1460,22 @@ lra_assign (void) bitmap_initialize (&all_spilled_pseudos, ®_obstack); create_live_range_start_chains (); setup_live_pseudos_and_spill_after_risky_transforms (&all_spilled_pseudos); -#ifdef ENABLE_CHECKING for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++) if (lra_reg_info[i].nrefs != 0 && reg_renumber[i] >= 0 && lra_reg_info[i].call_p && overlaps_hard_reg_set_p (call_used_reg_set, PSEUDO_REGNO_MODE (i), reg_renumber[i])) - gcc_unreachable (); -#endif + { + if (!flag_use_caller_save) + gcc_unreachable (); + call_used_reg_crosses_call++; + } + if (lra_dump_file + && call_used_reg_crosses_call > 0) + fprintf (lra_dump_file, + "Found %u pseudo(s) with a call used reg crossing a call.\n" + "Allowing due to -fuse-caller-save\n", + call_used_reg_crosses_call); /* Setup insns to process on the next constraint pass. */ bitmap_initialize (&changed_pseudo_bitmap, ®_obstack); init_live_reload_and_inheritance_pseudos (); |