diff options
| -rw-r--r-- | src/gallium/drivers/freedreno/ir3/ir3_cp.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/gallium/drivers/freedreno/ir3/ir3_cp.c b/src/gallium/drivers/freedreno/ir3/ir3_cp.c index 73c2a27c6eb..83bcb7a742b 100644 --- a/src/gallium/drivers/freedreno/ir3/ir3_cp.c +++ b/src/gallium/drivers/freedreno/ir3/ir3_cp.c @@ -70,7 +70,7 @@ static void walk_children(struct ir3_instruction *instr, bool keep) static struct ir3_instruction * instr_cp_fanin(struct ir3_instruction *instr) { - unsigned i; + unsigned i, j; /* we need to handle fanin specially, to detect cases * when we need to keep a mov @@ -92,7 +92,15 @@ instr_cp_fanin(struct ir3_instruction *instr) if (is_meta(cand) && (cand->opc == OPC_META_FO)) cand = instr_cp(src->instr, true); - src->instr = cand; + /* we can't have 2 registers referring to the same instruction, so + * go through and check if any already refer to the candidate + * instruction. if so, don't do the propagation. + */ + for (j = 1; j < instr->regs_count; j++) + if (instr->regs[j]->instr == cand) + break; + if (j == instr->regs_count) + src->instr = cand; } } |