ir3: Stop inserting nops during scheduling
Not necessary since nothing uses it anymore. This might have a slight effect on spilling with multiple blocks, but no shader-db difference because nothing spills. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13722>
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@ -1637,7 +1637,6 @@ unsigned ir3_delayslots_with_repeat(struct ir3_instruction *assigner,
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unsigned assigner_n, unsigned consumer_n);
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unsigned ir3_delay_calc(struct ir3_block *block,
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struct ir3_instruction *instr, bool mergedregs);
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void ir3_remove_nops(struct ir3 *ir);
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/* unreachable block elimination: */
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bool ir3_remove_unreachable(struct ir3 *ir);
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@ -348,23 +348,3 @@ ir3_delay_calc(struct ir3_block *block, struct ir3_instruction *instr,
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return delay_calc(block, NULL, instr, 0, &mask, mergedregs);
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}
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/**
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* Remove nop instructions. The scheduler can insert placeholder nop's
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* so that ir3_delay_calc() can account for nop's that won't be needed
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* due to nop's triggered by a previous instruction. However, before
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* legalize, we want to remove these. The legalize pass can insert
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* some nop's if needed to hold (for example) sync flags. This final
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* remaining nops are inserted by legalize after this.
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*/
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void
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ir3_remove_nops(struct ir3 *ir)
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{
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foreach_block (block, &ir->block_list) {
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foreach_instr_safe (instr, &block->instr_list) {
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if (instr->opc == OPC_NOP) {
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list_del(&instr->node);
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}
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}
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}
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}
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@ -862,8 +862,6 @@ ir3_legalize(struct ir3 *ir, struct ir3_shader_variant *so, int *max_bary)
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block->data = bd;
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}
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ir3_remove_nops(ir);
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/* We may have failed to pull all input loads into the first block.
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* In such case at the moment we aren't able to find a better place
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* to for (ei) than the end of the program.
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@ -687,14 +687,7 @@ sched_block(struct ir3_postsched_ctx *ctx, struct ir3_block *block)
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unsigned delay = node_delay(ctx, instr->data);
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d("delay=%u", delay);
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/* and if we run out of instructions that can be scheduled,
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* then it is time for nop's:
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*/
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debug_assert(delay <= 6);
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while (delay > 0) {
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ir3_NOP(block);
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delay--;
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}
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schedule(ctx, instr);
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}
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@ -756,7 +749,6 @@ ir3_postsched(struct ir3 *ir, struct ir3_shader_variant *v)
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.v = v,
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};
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ir3_remove_nops(ir);
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cleanup_self_movs(ir);
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foreach_block (block, &ir->block_list) {
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@ -1211,14 +1211,7 @@ sched_block(struct ir3_sched_ctx *ctx, struct ir3_block *block)
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unsigned delay = node_delay(ctx, instr->data);
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d("delay=%u", delay);
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/* and if we run out of instructions that can be scheduled,
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* then it is time for nop's:
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*/
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debug_assert(delay <= 6);
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while (delay > 0) {
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ir3_NOP(block);
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delay--;
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}
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schedule(ctx, instr);
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