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gl_arb_decompiler: Avoid several string copies 

Variables that are marked as const cannot have the move constructor
invoked when returning from a function (the move constructor requires a
non-const variable so it can "steal" the resources from it.
This commit is contained in:
Lioncash 2020-06-19 21:23:14 -04:00
parent 0f7822acb1
commit 5865a10885
1 changed files with 31 additions and 32 deletions
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63
src/video_core/renderer_opengl/gl_arb_decompiler.cpp
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@ -281,14 +281,14 @@ private:
template <const std::string_view& op>
std::string Unary(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("{}{} {}, {};", op, Modifiers(operation), temporary, Visit(operation[0]));
return temporary;
}
template <const std::string_view& op>
std::string Binary(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("{}{} {}, {}, {};", op, Modifiers(operation), temporary, Visit(operation[0]),
Visit(operation[1]));
return temporary;
@ -296,7 +296,7 @@ private:
template <const std::string_view& op>
std::string Trinary(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("{}{} {}, {}, {}, {};", op, Modifiers(operation), temporary, Visit(operation[0]),
Visit(operation[1]), Visit(operation[2]));
return temporary;
@ -304,7 +304,7 @@ private:
template <const std::string_view& op, bool unordered>
std::string FloatComparison(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("TRUNC.U.CC RC.x, {};", Binary<op>(operation));
AddLine("MOV.S {}, 0;", temporary);
AddLine("MOV.S {} (NE.x), -1;", temporary);
@ -331,7 +331,7 @@ private:
template <const std::string_view& op, bool is_nan>
std::string HalfComparison(Operation operation) {
const std::string tmp1 = AllocVectorTemporary();
std::string tmp1 = AllocVectorTemporary();
const std::string tmp2 = AllocVectorTemporary();
const std::string op_a = Visit(operation[0]);
const std::string op_b = Visit(operation[1]);
@ -367,15 +367,14 @@ private:
AddLine("MOV.F {}.{}, {};", value, Swizzle(i), Visit(meta.values[i]));
}
const std::string result = coord;
AddLine("ATOMIM.{}.{} {}.x, {}, {}, image[{}], {};", op, type, result, value, coord,
AddLine("ATOMIM.{}.{} {}.x, {}, {}, image[{}], {};", op, type, coord, value, coord,
image_id, ImageType(meta.image.type));
return fmt::format("{}.x", result);
return fmt::format("{}.x", coord);
}
template <const std::string_view& op, const std::string_view& type>
std::string Atomic(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
std::string address;
std::string_view opname;
if (const auto gmem = std::get_if<GmemNode>(&*operation[0])) {
@ -396,7 +395,7 @@ private:
template <char type>
std::string Negate(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
if constexpr (type == 'F') {
AddLine("MOV.F32 {}, -{};", temporary, Visit(operation[0]));
} else {
@ -407,7 +406,7 @@ private:
template <char type>
std::string Absolute(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("MOV.{} {}, |{}|;", type, temporary, Visit(operation[0]));
return temporary;
}
@ -1156,20 +1155,20 @@ void ARBDecompiler::VisitAST(const ASTNode& node) {
}
std::string ARBDecompiler::VisitExpression(const Expr& node) {
const std::string result = AllocTemporary();
if (const auto expr = std::get_if<ExprAnd>(&*node)) {
std::string result = AllocTemporary();
AddLine("AND.U {}, {}, {};", result, VisitExpression(expr->operand1),
VisitExpression(expr->operand2));
return result;
}
if (const auto expr = std::get_if<ExprOr>(&*node)) {
const std::string result = AllocTemporary();
std::string result = AllocTemporary();
AddLine("OR.U {}, {}, {};", result, VisitExpression(expr->operand1),
VisitExpression(expr->operand2));
return result;
}
if (const auto expr = std::get_if<ExprNot>(&*node)) {
const std::string result = AllocTemporary();
std::string result = AllocTemporary();
AddLine("CMP.S {}, {}, 0, -1;", result, VisitExpression(expr->operand1));
return result;
}
@ -1186,7 +1185,7 @@ std::string ARBDecompiler::VisitExpression(const Expr& node) {
return expr->value ? "0xffffffff" : "0";
}
if (const auto expr = std::get_if<ExprGprEqual>(&*node)) {
const std::string result = AllocTemporary();
std::string result = AllocTemporary();
AddLine("SEQ.U {}, R{}.x, {};", result, expr->gpr, expr->value);
return result;
}
@ -1231,13 +1230,13 @@ std::string ARBDecompiler::Visit(const Node& node) {
}
if (const auto immediate = std::get_if<ImmediateNode>(&*node)) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("MOV.U {}, {};", temporary, immediate->GetValue());
return temporary;
}
if (const auto predicate = std::get_if<PredicateNode>(&*node)) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
switch (const auto index = predicate->GetIndex(); index) {
case Tegra::Shader::Pred::UnusedIndex:
AddLine("MOV.S {}, -1;", temporary);
@ -1333,13 +1332,13 @@ std::string ARBDecompiler::Visit(const Node& node) {
} else {
offset_string = Visit(offset);
}
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("LDC.F32 {}, cbuf{}[{}];", temporary, cbuf->GetIndex(), offset_string);
return temporary;
}
if (const auto gmem = std::get_if<GmemNode>(&*node)) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("SUB.U {}, {}, {};", temporary, Visit(gmem->GetRealAddress()),
Visit(gmem->GetBaseAddress()));
AddLine("LDB.U32 {}, {}[{}];", temporary, GlobalMemoryName(gmem->GetDescriptor()),
@ -1348,14 +1347,14 @@ std::string ARBDecompiler::Visit(const Node& node) {
}
if (const auto lmem = std::get_if<LmemNode>(&*node)) {
const std::string temporary = Visit(lmem->GetAddress());
std::string temporary = Visit(lmem->GetAddress());
AddLine("SHR.U {}, {}, 2;", temporary, temporary);
AddLine("MOV.U {}, lmem[{}].x;", temporary, temporary);
return temporary;
}
if (const auto smem = std::get_if<SmemNode>(&*node)) {
const std::string temporary = Visit(smem->GetAddress());
std::string temporary = Visit(smem->GetAddress());
AddLine("LDS.U32 {}, shared_mem[{}];", temporary, temporary);
return temporary;
}
@ -1535,7 +1534,7 @@ std::string ARBDecompiler::Assign(Operation operation) {
}
std::string ARBDecompiler::Select(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("CMP.S {}, {}, {}, {};", temporary, Visit(operation[0]), Visit(operation[1]),
Visit(operation[2]));
return temporary;
@ -1545,12 +1544,12 @@ std::string ARBDecompiler::FClamp(Operation operation) {
// 1.0f in hex, replace with std::bit_cast on C++20
static constexpr u32 POSITIVE_ONE = 0x3f800000;
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
const Node& value = operation[0];
const Node& low = operation[1];
const Node& high = operation[2];
const auto imm_low = std::get_if<ImmediateNode>(&*low);
const auto imm_high = std::get_if<ImmediateNode>(&*high);
const auto* const imm_low = std::get_if<ImmediateNode>(&*low);
const auto* const imm_high = std::get_if<ImmediateNode>(&*high);
if (imm_low && imm_high && imm_low->GetValue() == 0 && imm_high->GetValue() == POSITIVE_ONE) {
AddLine("MOV.F32.SAT {}, {};", temporary, Visit(value));
} else {
@ -1574,7 +1573,7 @@ std::string ARBDecompiler::FCastHalf1(Operation operation) {
}
std::string ARBDecompiler::FSqrt(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("RSQ.F32 {}, {};", temporary, Visit(operation[0]));
AddLine("RCP.F32 {}, {};", temporary, temporary);
return temporary;
@ -1588,7 +1587,7 @@ std::string ARBDecompiler::FSwizzleAdd(Operation operation) {
AddLine("ADD.F {}.x, {}, {};", temporary, Visit(operation[0]), Visit(operation[1]));
return fmt::format("{}.x", temporary);
}
const std::string lut = AllocVectorTemporary();
AddLine("AND.U {}.z, {}.threadid, 3;", temporary, StageInputName(stage));
AddLine("SHL.U {}.z, {}.z, 1;", temporary, temporary);
AddLine("SHR.U {}.z, {}, {}.z;", temporary, Visit(operation[2]), temporary);
@ -1766,21 +1765,21 @@ std::string ARBDecompiler::LogicalAssign(Operation operation) {
}
std::string ARBDecompiler::LogicalPick2(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
const u32 index = std::get<ImmediateNode>(*operation[1]).GetValue();
AddLine("MOV.U {}, {}.{};", temporary, Visit(operation[0]), Swizzle(index));
return temporary;
}
std::string ARBDecompiler::LogicalAnd2(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
const std::string op = Visit(operation[0]);
AddLine("AND.U {}, {}.x, {}.y;", temporary, op, op);
return temporary;
}
std::string ARBDecompiler::FloatOrdered(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("MOVC.F32 RC.x, {};", Visit(operation[0]));
AddLine("MOVC.F32 RC.y, {};", Visit(operation[1]));
AddLine("MOV.S {}, -1;", temporary);
@ -1790,7 +1789,7 @@ std::string ARBDecompiler::FloatOrdered(Operation operation) {
}
std::string ARBDecompiler::FloatUnordered(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("MOVC.F32 RC.x, {};", Visit(operation[0]));
AddLine("MOVC.F32 RC.y, {};", Visit(operation[1]));
AddLine("MOV.S {}, 0;", temporary);
@ -1800,7 +1799,7 @@ std::string ARBDecompiler::FloatUnordered(Operation operation) {
}
std::string ARBDecompiler::LogicalAddCarry(Operation operation) {
const std::string temporary = AllocTemporary();
std::string temporary = AllocTemporary();
AddLine("ADDC.U RC, {}, {};", Visit(operation[0]), Visit(operation[1]));
AddLine("MOV.S {}, 0;", temporary);
AddLine("IF CF.x;");