diff options
| author | Eric Anholt <[email protected]> | 2018-12-11 14:07:52 -0800 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2018-12-14 17:48:01 -0800 |
| commit | a7e15a50866cf6bff1114d6e34ee8beab23ee7bb (patch) | |
| tree | 9c2cded5063d54d80b468eab5205715de0ed915e /src | |
| parent | 5b2cc038522de2bd4b522d6376aef34c65af02d5 (diff) | |
v3d: Avoid assertion failures when removing end-of-shader instructions.
After generating VIR, we leave c->cursor pointing at the end of the
shader. If the shader had dead code at the end (for example from preamble
instructions in a shader with no side effects), we would assertion fail
that we were leaving the cursor pointing at freed memory. Since anything
following DCE should be setting up a new cursor anyway, just clear the
cursor at the start.
Diffstat (limited to 'src')
| -rw-r--r-- | src/broadcom/compiler/vir_opt_dead_code.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/broadcom/compiler/vir_opt_dead_code.c b/src/broadcom/compiler/vir_opt_dead_code.c index 362fc9e52a3..4aedbb6540f 100644 --- a/src/broadcom/compiler/vir_opt_dead_code.c +++ b/src/broadcom/compiler/vir_opt_dead_code.c @@ -101,6 +101,12 @@ vir_opt_dead_code(struct v3d_compile *c) bool progress = false; bool *used = calloc(c->num_temps, sizeof(bool)); + /* Defuse the "are you removing the cursor?" assertion in the core. + * You'll need to set up a new cursor for any new instructions after + * doing DCE (which we would expect, anyway). + */ + c->cursor.link = NULL; + vir_for_each_inst_inorder(inst, c) { for (int i = 0; i < vir_get_nsrc(inst); i++) { if (inst->src[i].file == QFILE_TEMP) |