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ir_to_mesa: Don't dereference a NULL pointer during copy propagation

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The ACP may already be NULL, so don't try to make it NULL again.

This should fix bugzilla #34119.
This commit is contained in:
Ian Romanick 2011-02-11 15:19:05 -08:00
parent a0120e6e0f
commit 3803295fc2
1 changed files with 3 additions and 0 deletions
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3
src/mesa/program/ir_to_mesa.cpp
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@ -2754,6 +2754,9 @@ ir_to_mesa_visitor::copy_propagate(void)
*/
for (int r = 0; r < this->next_temp; r++) {
for (int c = 0; c < 4; c++) {
if (!acp[4 * r + c])
continue;
if (acp[4 * r + c]->src_reg[0].file == PROGRAM_OUTPUT)
acp[4 * r + c] = NULL;
}