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freedreno/ir3: don't remove unused input components 

Fixes: 0d240c2214 freedreno/ir3: don't fetch unused tex components
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark 2018-12-13 13:50:50 -05:00
parent c19c4bf488
commit cca1e9606c
1 changed files with 7 additions and 1 deletions
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8
src/freedreno/ir3/ir3_depth.c
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@ -176,7 +176,13 @@ remove_unused_by_block(struct ir3_block *block)
if (instr->flags & IR3_INSTR_UNUSED) {
if (instr->opc == OPC_META_FO) {
struct ir3_instruction *src = ssa(instr->regs[1]);
if (src->regs[0]->wrmask > 1) {
/* leave inputs alone.. we can't optimize out components of
* an input, since the hw is still going to be writing all
* of the components, and we could end up in a situation
* where multiple inputs overlap.
*/
if ((src->opc != OPC_META_INPUT) &&
(src->regs[0]->wrmask > 1)) {
src->regs[0]->wrmask &= ~(1 << instr->fo.off);
/* prune no-longer needed right-neighbors. We could