Module: Mesa
Branch: master
Commit: aa76ba6f2fb0d6438b2b652d9fa466b6cf77fa31
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=aa76ba6f2fb0d6438b2b652d9fa466b6cf77fa31
Author: Eric Anholt <e...@anholt.net>
Date: Fri Jun 3 15:06:52 2016 -0700
vc4: DCE instructions with a NULL destination.
I'm going to add an optimization for redundant SF update removal, which
will just remove the SF and leave us (in many cases) with an instruction
with a NULL destination and no side effects. Rather than teaching that
pass whether the whole instruction can be removed, leave that
responsibility to this pass.
---
src/gallium/drivers/vc4/vc4_opt_dead_code.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/src/gallium/drivers/vc4/vc4_opt_dead_code.c
b/src/gallium/drivers/vc4/vc4_opt_dead_code.c
index d3562ee..ad51ed7 100644
--- a/src/gallium/drivers/vc4/vc4_opt_dead_code.c
+++ b/src/gallium/drivers/vc4/vc4_opt_dead_code.c
@@ -86,8 +86,9 @@ qir_opt_dead_code(struct vc4_compile *c)
list_for_each_entry_safe_rev(struct qinst, inst, &c->instructions,
link) {
- if (inst->dst.file == QFILE_TEMP &&
- !used[inst->dst.index] &&
+ if ((inst->dst.file == QFILE_NULL ||
+ (inst->dst.file == QFILE_TEMP &&
+ !used[inst->dst.index])) &&
!inst->sf &&
!qir_has_side_effects(c, inst) &&
!has_nonremovable_reads(c, inst)) {
_______________________________________________
mesa-commit mailing list
mesa-commit@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-commit
