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i965/vec4: skip registers already marked as no_spill

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Do not evaluate spill costs for registers that were already marked as
no_spill.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Juan A. Suarez Romero 2016-11-08 11:59:44 +01:00
parent 151aecabe4
commit 7b9a9a0c5d
1 changed files with 2 additions and 2 deletions
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4
src/mesa/drivers/dri/i965/brw_vec4_reg_allocate.cpp
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@ -385,7 +385,7 @@ vec4_visitor::evaluate_spill_costs(float *spill_costs, bool *no_spill)
*/
foreach_block_and_inst(block, vec4_instruction, inst, cfg) {
for (unsigned int i = 0; i < 3; i++) {
if (inst->src[i].file == VGRF) {
if (inst->src[i].file == VGRF && !no_spill[inst->src[i].nr]) {
/* We will only unspill src[i] it it wasn't unspilled for the
* previous instruction, in which case we'll just reuse the scratch
* reg for this instruction.
@ -399,7 +399,7 @@ vec4_visitor::evaluate_spill_costs(float *spill_costs, bool *no_spill)
}
}
if (inst->dst.file == VGRF) {
if (inst->dst.file == VGRF && !no_spill[inst->dst.nr]) {
spill_costs[inst->dst.nr] += loop_scale;
if (inst->dst.reladdr || inst->dst.offset % REG_SIZE != 0)
no_spill[inst->dst.nr] = true;