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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <map>
#include <set>
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/value.h"
#include "shader_recompiler/ir_opt/passes.h"
namespace Shader::Optimization {
static void ValidateTypes(const IR::Program& program) {
for (const auto& block : program.blocks) {
for (const IR::Inst& inst : *block) {
if (inst.GetOpcode() == IR::Opcode::Phi) {
// Skip validation on phi nodes
continue;
}
const size_t num_args{inst.NumArgs()};
for (size_t i = 0; i < num_args; ++i) {
const IR::Type t1{inst.Arg(i).Type()};
const IR::Type t2{IR::ArgTypeOf(inst.GetOpcode(), i)};
if (!IR::AreTypesCompatible(t1, t2)) {
throw LogicError("Invalid types in block:\n{}", IR::DumpBlock(*block));
}
}
}
}
}
static void ValidateUses(const IR::Program& program) {
std::map<IR::Inst*, int> actual_uses;
for (const auto& block : program.blocks) {
for (const IR::Inst& inst : *block) {
const size_t num_args{inst.NumArgs()};
for (size_t i = 0; i < num_args; ++i) {
const IR::Value arg{inst.Arg(i)};
if (!arg.IsImmediate()) {
++actual_uses[arg.Inst()];
}
}
}
}
for (const auto [inst, uses] : actual_uses) {
if (inst->UseCount() != uses) {
throw LogicError("Invalid uses in block: {}", IR::DumpProgram(program));
}
}
}
static void ValidateForwardDeclarations(const IR::Program& program) {
std::set<const IR::Inst*> definitions;
for (const IR::Block* const block : program.blocks) {
for (const IR::Inst& inst : *block) {
definitions.emplace(&inst);
if (inst.GetOpcode() == IR::Opcode::Phi) {
// Phi nodes can have forward declarations
continue;
}
const size_t num_args{inst.NumArgs()};
for (size_t arg = 0; arg < num_args; ++arg) {
if (inst.Arg(arg).IsImmediate()) {
continue;
}
if (!definitions.contains(inst.Arg(arg).Inst())) {
throw LogicError("Forward declaration in block: {}", IR::DumpBlock(*block));
}
}
}
}
}
static void ValidatePhiNodes(const IR::Program& program) {
for (const IR::Block* const block : program.blocks) {
bool no_more_phis{false};
for (const IR::Inst& inst : *block) {
if (inst.GetOpcode() == IR::Opcode::Phi) {
if (no_more_phis) {
throw LogicError("Interleaved phi nodes: {}", IR::DumpBlock(*block));
}
} else {
no_more_phis = true;
}
}
}
}
void VerificationPass(const IR::Program& program) {
ValidateTypes(program);
ValidateUses(program);
ValidateForwardDeclarations(program);
ValidatePhiNodes(program);
}
} // namespace Shader::Optimization
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