vc4: Don't try to CSE non-SSA instructions.

This can happen when we're doing destination packing -- we don't know what's in the rest of the register. Signed-off-by: Eric Anholt <eric@anholt.net>
2015-10-23 16:34:01 +01:00
parent 5b2fb138bc
commit 817a7eb588
1 changed files with 1 additions and 0 deletions
@@ -65,6 +65,7 @@ vc4_find_cse(struct vc4_compile *c, struct hash_table *ht,
             struct qinst *inst, uint32_t sf_count)
 {
        if (inst->dst.file != QFILE_TEMP ||
+            !c->defs[inst->dst.index] ||
            inst->op == QOP_MOV ||
            qir_get_op_nsrc(inst->op) > 4) {
                return NULL;