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aco/spill: compute live-in variables from live-out

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27799>
This commit is contained in:
Daniel Schürmann 2024-02-15 16:01:47 +01:00 • committed by Marge Bot
parent bfb62fa70d
commit fab8757831
1 changed files with 25 additions and 0 deletions
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25
src/amd/compiler/aco_spill.cpp
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@ -171,6 +171,30 @@ struct spill_ctx {
uint32_t next_spill_id = 0;
};
void
compute_live_in(spill_ctx& ctx)
{
for (Block& block : ctx.program->blocks) {
IDSet& live_set = ctx.live_vars.live_out[block.index];
for (int i = block.instructions.size() - 1; i >= 0; i--) {
aco_ptr<Instruction>& instr = block.instructions[i];
const bool phi = is_phi(instr);
for (const Definition& def : instr->definitions) {
if (!phi && def.isTemp() && !def.isKill())
live_set.erase(def.tempId());
}
for (const Operand& op : instr->operands) {
if (op.isTemp()) {
if (!phi && op.isFirstKill())
live_set.insert(op.tempId());
}
}
}
}
}
int32_t
get_dominator(int idx_a, int idx_b, Program* program, bool is_linear)
{
@ -1866,6 +1890,7 @@ spill(Program* program, live& live_vars)
/* initialize ctx */
spill_ctx ctx(target, program, live_vars);
compute_live_in(ctx);
compute_global_next_uses(ctx);
get_rematerialize_info(ctx);