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aco: create pseudo dummy instruction in RA to be used for live-range splits

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Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4573>
This commit is contained in:
Daniel Schürmann
2020-04-13 13:11:30 +01:00
committed by Marge Bot
parent d9f7d1d5cb
commit 5b2f628da3
1 changed files with 6 additions and 2 deletions
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src/amd/compiler/aco_register_allocation.cpp
+6 -2
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@@ -64,6 +64,7 @@ struct ra_ctx {
std::unordered_map<unsigned, phi_info> phi_map;
std::unordered_map<unsigned, unsigned> affinities;
std::unordered_map<unsigned, Instruction*> vectors;
aco_ptr<Instruction> pseudo_dummy;
unsigned max_used_sgpr = 0;
unsigned max_used_vgpr = 0;
std::bitset<64> defs_done; /* see MAX_ARGS in aco_instruction_selection_setup.cpp */
@@ -73,7 +74,10 @@ struct ra_ctx {
renames(program->blocks.size()),
incomplete_phis(program->blocks.size()),
filled(program->blocks.size()),
sealed(program->blocks.size()) {}
sealed(program->blocks.size())
{
pseudo_dummy.reset(create_instruction<Instruction>(aco_opcode::p_parallelcopy, Format::PSEUDO, 0, 0));
}
};
class RegisterFile {
@@ -1198,7 +1202,7 @@ void get_reg_for_operand(ra_ctx& ctx, RegisterFile& register_file,
pc_op.setFixed(operand.physReg());
/* find free reg */
PhysReg reg = get_reg(ctx, register_file, pc_op.getTemp(), parallelcopy, instr);
PhysReg reg = get_reg(ctx, register_file, pc_op.getTemp(), parallelcopy, ctx.pseudo_dummy);
Definition pc_def = Definition(PhysReg{reg}, pc_op.regClass());
register_file.clear(pc_op);
parallelcopy.emplace_back(pc_op, pc_def);