procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

re PR rtl-optimization/55604 (ICE while dumping in remove_some_program_points_and_update_live_ranges)

Browse source 
PR rtl-optimization/55604
	* lra-lives.c (lra_create_live_ranges): If there are no referenced
	pseudos left, do not compute live ranges.

From-SVN: r194230
This commit is contained in:
Steven Bosscher 2012-12-05 23:55:28 +00:00
parent aeb9f7cf3c
commit 85f9ce675d
2 changed files with 24 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
gcc/ChangeLog
View file

@ -1,3 +1,9 @@
2012-12-05 Steven Bosscher <steven@gcc.gnu.org>
PR rtl-optimization/55604
* lra-lives.c (lra_create_live_ranges): If there are no referenced
pseudos left, do not compute live ranges.
2012-12-05 Steven Bosscher <steven@gcc.gnu.org>
* doc/tm.texi.in (TARGET_CLASS_LIKELY_SPILLED_P): Update documentation.

20
gcc/lra-lives.c
View file

@ -915,6 +915,7 @@ lra_create_live_ranges (bool all_p)
basic_block bb;
int i, hard_regno, max_regno = max_reg_num ();
int curr_point;
bool have_referenced_pseudos = false;
timevar_push (TV_LRA_CREATE_LIVE_RANGES);
@ -947,10 +948,24 @@ lra_create_live_ranges (bool all_p)
lra_reg_info[i].call_p = false;
#endif
if (i >= FIRST_PSEUDO_REGISTER
&& lra_reg_info[i].nrefs != 0 && (hard_regno = reg_renumber[i]) >= 0)
lra_hard_reg_usage[hard_regno] += lra_reg_info[i].freq;
&& lra_reg_info[i].nrefs != 0)
{
if ((hard_regno = reg_renumber[i]) >= 0)
lra_hard_reg_usage[hard_regno] += lra_reg_info[i].freq;
have_referenced_pseudos = true;
}
}
lra_free_copies ();
/* Under some circumstances, we can have functions without pseudo
registers. For such functions, lra_live_max_point will be 0,
see e.g. PR55604, and there's nothing more to do for us here. */
if (! have_referenced_pseudos)
{
timevar_pop (TV_LRA_CREATE_LIVE_RANGES);
return;
}
pseudos_live = sparseset_alloc (max_regno);
pseudos_live_through_calls = sparseset_alloc (max_regno);
pseudos_live_through_setjumps = sparseset_alloc (max_regno);
@ -973,6 +988,7 @@ lra_create_live_ranges (bool all_p)
}
free (post_order_rev_cfg);
lra_live_max_point = curr_point;
gcc_checking_assert (lra_live_max_point > 0);
if (lra_dump_file != NULL)
print_live_ranges (lra_dump_file);
/* Clean up. */