freedreno/ir3: fix use_count refcnt'ing issue

Was hitting an assert with vs-varying-array-mat4-index-col-row-wr.shader_test

When eliminating a copy, we were dropping the use_count of the mov that
is skipped, but not increasing the use_count of it's src instruction.

Fixes: 76440fcca91 freedreno/ir3: clean up dangling false-dep's
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/src/gallium/drivers/freedreno/ir3/ir3_cp.c b/src/gallium/drivers/freedreno/ir3/ir3_cp.c
index 7713c645e08b1499a01fecb82de6cf3e9c355e16..391e94ca44f707c8ec5fd52b50fef41fb2119b84 100644 (file)
--- a/src/gallium/drivers/freedreno/ir3/ir3_cp.c
+++ b/src/gallium/drivers/freedreno/ir3/ir3_cp.c
@@ -361,6 +361,7 @@ reg_cp(struct ir3_cp_ctx *ctx, struct ir3_instruction *instr,
                        instr->barrier_conflict |= src->barrier_conflict;
 
                        unuse(src);
+                       reg->instr->use_count++;
                }
 
        } else if (is_same_type_mov(src) &&