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gl_shader_decompiler: Refactor and address feedback.

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This commit is contained in:
Fernando Sahmkow 2019-09-22 12:33:13 -04:00 committed by FernandoS27
parent b3c46d6948
commit 189a50bc2a
1 changed files with 18 additions and 17 deletions
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35
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -355,7 +355,7 @@ public:
if (!ir.IsFlowStackDisabled()) {
for (const auto stack : std::array{MetaStackClass::Ssy, MetaStackClass::Pbk}) {
code.AddLine("uint {}[{}];", FlowStackName(stack), FLOW_STACK_SIZE);
code.AddLine("uint {} = 0u;", FlowStackTopName(stack));
code.AddLine("uint {} = 0U;", FlowStackTopName(stack));
}
}
@ -1837,10 +1837,9 @@ private:
return {};
}
Expression WriteExit() {
void PreExit() {
if (stage != ProgramType::Fragment) {
code.AddLine("return;");
return {};
return;
}
const auto& used_registers = ir.GetRegisters();
const auto SafeGetRegister = [&](u32 reg) -> Expression {
@ -1872,13 +1871,12 @@ private:
// already contains one past the last color register.
code.AddLine("gl_FragDepth = {};", SafeGetRegister(current_reg + 1).AsFloat());
}
code.AddLine("return;");
return {};
}
Expression Exit(Operation operation) {
return WriteExit();
PreExit();
code.AddLine("return;");
return {};
}
Expression Discard(Operation operation) {
@ -2277,7 +2275,7 @@ const std::string flow_var = "flow_var_";
class ExprDecompiler {
public:
ExprDecompiler(GLSLDecompiler& decomp) : decomp{decomp} {}
explicit ExprDecompiler(GLSLDecompiler& decomp) : decomp{decomp} {}
void operator()(VideoCommon::Shader::ExprAnd& expr) {
inner += "( ";
@ -2301,12 +2299,12 @@ public:
}
void operator()(VideoCommon::Shader::ExprPredicate& expr) {
auto pred = static_cast<Tegra::Shader::Pred>(expr.predicate);
const auto pred = static_cast<Tegra::Shader::Pred>(expr.predicate);
inner += decomp.GetPredicate(pred);
}
void operator()(VideoCommon::Shader::ExprCondCode& expr) {
Node cc = decomp.ir.GetConditionCode(expr.cc);
const Node cc = decomp.ir.GetConditionCode(expr.cc);
std::string target;
if (const auto pred = std::get_if<PredicateNode>(&*cc)) {
@ -2321,6 +2319,8 @@ public:
}
} else if (const auto flag = std::get_if<InternalFlagNode>(&*cc)) {
target = decomp.GetInternalFlag(flag->GetFlag());
} else {
UNREACHABLE();
}
inner += target;
}
@ -2338,13 +2338,13 @@ public:
}
private:
std::string inner{};
std::string inner;
GLSLDecompiler& decomp;
};
class ASTDecompiler {
public:
ASTDecompiler(GLSLDecompiler& decomp) : decomp{decomp} {}
explicit ASTDecompiler(GLSLDecompiler& decomp) : decomp{decomp} {}
void operator()(VideoCommon::Shader::ASTProgram& ast) {
ASTNode current = ast.nodes.GetFirst();
@ -2417,7 +2417,7 @@ public:
}
void operator()(VideoCommon::Shader::ASTReturn& ast) {
bool is_true = VideoCommon::Shader::ExprIsTrue(ast.condition);
const bool is_true = VideoCommon::Shader::ExprIsTrue(ast.condition);
if (!is_true) {
ExprDecompiler expr_parser{decomp};
std::visit(expr_parser, *ast.condition);
@ -2427,7 +2427,8 @@ public:
if (ast.kills) {
decomp.code.AddLine("discard;");
} else {
decomp.WriteExit();
decomp.PreExit();
decomp.code.AddLine("return;");
}
if (!is_true) {
decomp.code.scope--;
@ -2436,7 +2437,7 @@ public:
}
void operator()(VideoCommon::Shader::ASTBreak& ast) {
bool is_true = VideoCommon::Shader::ExprIsTrue(ast.condition);
const bool is_true = VideoCommon::Shader::ExprIsTrue(ast.condition);
if (!is_true) {
ExprDecompiler expr_parser{decomp};
std::visit(expr_parser, *ast.condition);
@ -2459,7 +2460,7 @@ private:
};
void GLSLDecompiler::DecompileAST() {
u32 num_flow_variables = ir.GetASTNumVariables();
const u32 num_flow_variables = ir.GetASTNumVariables();
for (u32 i = 0; i < num_flow_variables; i++) {
code.AddLine("bool {}{} = false;", flow_var, i);
}