fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-02-04 10:40:36 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 3

aco/ra: Move register preservation logic in last block to p_return

Browse source 
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29580>
This commit is contained in:
Natalie Vock 2025-11-26 14:04:39 +01:00 • committed by Marge Bot
parent 9d2c3c3db2
commit 8525993d02
1 changed files with 7 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
src/amd/compiler/aco_register_allocation.cpp
View file

@ -3682,10 +3682,9 @@ recreate_blocking_vectors(ra_ctx& ctx, const std::vector<Instruction*>& splits,
}
}
void
handle_last_reload_preserved(ra_ctx& ctx, aco_ptr<Instruction>& instr,
std::vector<parallelcopy>& parallelcopy, RegisterFile& register_file)
handle_return(ra_ctx& ctx, aco_ptr<Instruction>& instr, std::vector<parallelcopy>& parallelcopy,
RegisterFile& register_file)
{
BITSET_DECLARE(preserved_regs, 512);
ctx.program->callee_abi.preservedRegisters(preserved_regs);
@ -3839,13 +3838,12 @@ register_allocation(Program* program, ra_test_policy policy)
register_file.clear(op);
}
/* If this is the last p_reload_preserved, we have no more opportunities to restore
* overwritten ABI-preserved registers. Make sure all remaining temporaries are outside
* preserved registers, then block the preserved registers to mark them unusable.
/* After p_return, we have no more opportunities to restore overwritten ABI-preserved
* registers. Make sure all remaining temporaries are outside preserved registers, then
* block the preserved registers to mark them unusable.
*/
if (instr->opcode == aco_opcode::p_reload_preserved && block.linear_succs.empty()) {
handle_last_reload_preserved(ctx, instr, parallelcopy, register_file);
}
if (instr->opcode == aco_opcode::p_return)
handle_return(ctx, instr, parallelcopy, register_file);
BITSET_DECLARE(call_clobbered_regs, 512);
if (instr->isCall()) {