Enabling GVN uncovered a bug where we would crash if the pass
thinking about pushing something into a loop.
Fixes:
6538b3e56614 ("nir: add heuristic for instructions in loops with GCM")
Acked-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12242>
set_block_for_loop_instr(struct gcm_state *state, nir_instr *instr,
nir_block *block)
{
+ /* If the instruction wasn't in a loop to begin with we don't want to push
+ * it down into one.
+ */
+ nir_loop *loop = state->blocks[instr->block->index].loop;
+ if (loop == NULL)
+ return true;
+
if (nir_block_dominates(instr->block, block))
return true;
* do{ ... break; } while(true)
* Don't move the instruction as it will not help anything.
*/
- nir_loop *loop = state->blocks[instr->block->index].loop;
if (loop->info->limiting_terminator == NULL && !loop->info->complex_loop &&
nir_block_ends_in_break(nir_loop_last_block(loop)))
return false;