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shader: Move loop safety tests to code emission

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This commit is contained in:
ReinUsesLisp 2021-06-21 01:07:10 -03:00 • committed by ameerj
parent 3877918e96
commit 808ef97a08
16 changed files with 54 additions and 108 deletions
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37
src/shader_recompiler/frontend/maxwell/structured_control_flow.cpp
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@ -15,7 +15,6 @@
#include <boost/intrusive/list.hpp>
#include "common/settings.h"
#include "shader_recompiler/environment.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/ir_emitter.h"
@ -663,7 +662,7 @@ public:
Visit(root_stmt, nullptr, nullptr);
IR::Block& first_block{*syntax_list.front().data.block};
IR::IREmitter ir = IR::IREmitter(first_block, first_block.begin());
IR::IREmitter ir(first_block, first_block.begin());
ir.Prologue();
}
@ -741,27 +740,8 @@ private:
}
case StatementType::Loop: {
IR::Block* const loop_header_block{block_pool.Create(inst_pool)};
const u32 this_loop_id{loop_id++};
if (Settings::values.disable_shader_loop_safety_checks) {
if (current_block) {
current_block->AddBranch(loop_header_block);
}
} else {
IR::Block* const init_block{block_pool.Create(inst_pool)};
IR::IREmitter ir{*init_block};
static constexpr u32 SAFETY_THRESHOLD = 0x1000;
ir.SetLoopSafetyVariable(this_loop_id, ir.Imm32(SAFETY_THRESHOLD));
if (current_block) {
current_block->AddBranch(init_block);
}
init_block->AddBranch(loop_header_block);
auto& init_node{syntax_list.emplace_back()};
init_node.type = IR::AbstractSyntaxNode::Type::Block;
init_node.data.block = init_block;
if (current_block) {
current_block->AddBranch(loop_header_block);
}
auto& header_node{syntax_list.emplace_back()};
header_node.type = IR::AbstractSyntaxNode::Type::Block;
@ -779,16 +759,7 @@ private:
// The continue block is located at the end of the loop
IR::IREmitter ir{*continue_block};
IR::U1 cond{VisitExpr(ir, *stmt.cond)};
if (!Settings::values.disable_shader_loop_safety_checks) {
const IR::U32 old_counter{ir.GetLoopSafetyVariable(this_loop_id)};
const IR::U32 new_counter{ir.ISub(old_counter, ir.Imm32(1))};
ir.SetLoopSafetyVariable(this_loop_id, new_counter);
const IR::U1 safety_cond{ir.INotEqual(new_counter, ir.Imm32(0))};
cond = ir.LogicalAnd(cond, safety_cond);
}
cond = ir.ConditionRef(cond);
const IR::U1 cond{ir.ConditionRef(VisitExpr(ir, *stmt.cond))};
IR::Block* const body_block{syntax_list.at(body_block_index).data.block};
loop_header_block->AddBranch(body_block);