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-rw-r--r--src/gallium/drivers/vc4/vc4_opt_dead_code.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/src/gallium/drivers/vc4/vc4_opt_dead_code.c b/src/gallium/drivers/vc4/vc4_opt_dead_code.c
index 0c273fff8f5..f08818adc95 100644
--- a/src/gallium/drivers/vc4/vc4_opt_dead_code.c
+++ b/src/gallium/drivers/vc4/vc4_opt_dead_code.c
@@ -52,6 +52,8 @@ qir_opt_dead_code(struct vc4_compile *c)
bool progress = false;
bool *used = calloc(c->num_temps, sizeof(bool));
bool sf_used = false;
+ /* Whether we're eliminating texture setup currently. */
+ bool dce_tex = false;
struct simple_node *node, *t;
for (node = c->instructions.prev, t = node->prev;
@@ -61,7 +63,13 @@ qir_opt_dead_code(struct vc4_compile *c)
if (inst->dst.file == QFILE_TEMP &&
!used[inst->dst.index] &&
- !qir_has_side_effects(inst)) {
+ (!qir_has_side_effects(inst) ||
+ inst->op == QOP_TEX_RESULT)) {
+ if (inst->op == QOP_TEX_RESULT) {
+ dce_tex = true;
+ c->num_texture_samples--;
+ }
+
dce(c, inst);
progress = true;
continue;
@@ -78,6 +86,18 @@ qir_opt_dead_code(struct vc4_compile *c)
sf_used = false;
}
+ if (inst->op == QOP_TEX_RESULT)
+ dce_tex = false;
+
+ if (dce_tex && (inst->op == QOP_TEX_S ||
+ inst->op == QOP_TEX_T ||
+ inst->op == QOP_TEX_R ||
+ inst->op == QOP_TEX_B)) {
+ dce(c, inst);
+ progress = true;
+ continue;
+ }
+
for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) {
if (inst->src[i].file == QFILE_TEMP)
used[inst->src[i].index] = true;