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shader: Add shader loop safety check settings

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Also add a setting for enable Nsight Aftermath.
This commit is contained in:
lat9nq 2021-07-08 17:22:31 -04:00 • committed by ameerj
parent 487057b8d2
commit 373f75d944
16 changed files with 183 additions and 35 deletions
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42
src/shader_recompiler/frontend/maxwell/structured_control_flow.cpp
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@ -9,11 +9,13 @@
#include <unordered_map>
#include <utility>
#include <vector>
#include <version>
#include <fmt/format.h>
#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"
@ -739,8 +741,25 @@ private:
}
case StatementType::Loop: {
IR::Block* const loop_header_block{block_pool.Create(inst_pool)};
if (current_block) {
current_block->AddBranch(loop_header_block);
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};
ir.SetLoopSafetyVariable(this_loop_id, ir.Imm32(0x2000));
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;
}
auto& header_node{syntax_list.emplace_back()};
header_node.type = IR::AbstractSyntaxNode::Type::Block;
@ -758,7 +777,16 @@ private:
// The continue block is located at the end of the loop
IR::IREmitter ir{*continue_block};
const IR::U1 cond{ir.ConditionRef(VisitExpr(ir, *stmt.cond))};
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);
IR::Block* const body_block{syntax_list.at(body_block_index).data.block};
loop_header_block->AddBranch(body_block);
@ -863,8 +891,14 @@ private:
ObjectPool<IR::Block>& block_pool;
Environment& env;
IR::AbstractSyntaxList& syntax_list;
// TODO: Make this constexpr when std::vector is constexpr
u32 loop_id{};
// TODO: C++20 Remove this when all compilers support constexpr std::vector
#if __cpp_lib_constexpr_vector >= 201907
static constexpr Flow::Block dummy_flow_block;
#else
const Flow::Block dummy_flow_block;
#endif
};
} // Anonymous namespace