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pan/midgard: Use standard list traversal to find initial tag

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Fixes a hang (and abort) on empty shaders, which you shouldn't have
anyway but better safe than sorry. DCE going on the fritz is no reason
to freeze the system.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-07-31 15:49:30 -07:00
parent 4647999327
commit 73c40d6bbb
1 changed files with 4 additions and 7 deletions
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11
src/panfrost/midgard/midgard_compile.c
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@ -2229,19 +2229,16 @@ midgard_get_first_tag_from_block(compiler_context *ctx, unsigned block_idx)
unsigned first_tag = 0;
do {
midgard_bundle *initial_bundle = util_dynarray_element(&initial_block->bundles, midgard_bundle, 0);
mir_foreach_block_from(ctx, initial_block, v) {
midgard_bundle *initial_bundle =
util_dynarray_element(&v->bundles, midgard_bundle, 0);
if (initial_bundle) {
first_tag = initial_bundle->tag;
break;
}
}
/* Initial block is empty, try the next block */
initial_block = list_first_entry(&(initial_block->link), midgard_block, link);
} while(initial_block != NULL);
assert(first_tag);
return first_tag;
}