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aarch64: PR target/99820: Guard on available SVE issue info before using

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This fixes a simple segfault ICE when using the use_new_vector_costs tunable with a CPU tuning that it wasn't intended for.
I'm not adding a testcase here as we intend to remove the tunable for GCC 12 anyway (the new costing logic will remain and will benefit
from this extra check, but the -moverride option will no longer exist).

gcc/ChangeLog:

	PR target/99820
	* config/aarch64/aarch64.c (aarch64_analyze_loop_vinfo): Check for
	available issue_info before using it.
This commit is contained in:
Kyrylo Tkachov 2021-03-30 16:42:17 +01:00
parent 19199a6f2b
commit c277abd9cd
1 changed files with 3 additions and 1 deletions
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4
gcc/config/aarch64/aarch64.c
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@ -14460,7 +14460,9 @@ aarch64_analyze_loop_vinfo (loop_vec_info loop_vinfo,
/* Record the issue information for any SVE WHILE instructions that the
loop needs. */
auto *issue_info = aarch64_tune_params.vec_costs->issue_info;
if (issue_info->sve && !LOOP_VINFO_MASKS (loop_vinfo).is_empty ())
if (issue_info
&& issue_info->sve
&& !LOOP_VINFO_MASKS (loop_vinfo).is_empty ())
{
unsigned int num_masks = 0;
rgroup_controls *rgm;