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shader: Initial implementation of an AST

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This commit is contained in:
ReinUsesLisp
2021-02-11 16:39:06 -03:00
committed by ameerj
parent 2930dccecc
commit 9170200a11
33 changed files with 1347 additions and 591 deletions
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40
src/shader_recompiler/frontend/ir/basic_block.h
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@ -11,7 +11,9 @@
#include <boost/intrusive/list.hpp>
#include "shader_recompiler/frontend/ir/condition.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/ir/value.h"
#include "shader_recompiler/object_pool.h"
namespace Shader::IR {
@ -26,6 +28,7 @@ public:
using const_reverse_iterator = InstructionList::const_reverse_iterator;
explicit Block(ObjectPool<Inst>& inst_pool_, u32 begin, u32 end);
explicit Block(ObjectPool<Inst>& inst_pool_);
~Block();
Block(const Block&) = delete;
@ -41,9 +44,15 @@ public:
iterator PrependNewInst(iterator insertion_point, Opcode op,
std::initializer_list<Value> args = {}, u64 flags = 0);
/// Adds a new immediate predecessor to the basic block.
void AddImmediatePredecessor(IR::Block* immediate_predecessor);
/// Set the branches to jump to when all instructions have executed.
void SetBranches(Condition cond, Block* branch_true, Block* branch_false);
/// Set the branch to unconditionally jump to when all instructions have executed.
void SetBranch(Block* branch);
/// Mark the block as a return block.
void SetReturn();
/// Returns true when the block does not implement any guest instructions directly.
[[nodiscard]] bool IsVirtual() const noexcept;
/// Gets the starting location of this basic block.
[[nodiscard]] u32 LocationBegin() const noexcept;
/// Gets the end location for this basic block.
@ -54,8 +63,23 @@ public:
/// Gets an immutable reference to the instruction list for this basic block.
[[nodiscard]] const InstructionList& Instructions() const noexcept;
/// Adds a new immediate predecessor to this basic block.
void AddImmediatePredecessor(Block* block);
/// Gets an immutable span to the immediate predecessors.
[[nodiscard]] std::span<IR::Block* const> ImmediatePredecessors() const noexcept;
[[nodiscard]] std::span<Block* const> ImmediatePredecessors() const noexcept;
[[nodiscard]] Condition BranchCondition() const noexcept {
return branch_cond;
}
[[nodiscard]] bool IsTerminationBlock() const noexcept {
return !branch_true && !branch_false;
}
[[nodiscard]] Block* TrueBranch() const noexcept {
return branch_true;
}
[[nodiscard]] Block* FalseBranch() const noexcept {
return branch_false;
}
[[nodiscard]] bool empty() const {
return instructions.empty();
@ -129,10 +153,18 @@ private:
/// List of instructions in this block
InstructionList instructions;
/// Condition to choose the branch to take
Condition branch_cond{true};
/// Block to jump into when the branch condition evaluates as true
Block* branch_true{nullptr};
/// Block to jump into when the branch condition evaluates as false
Block* branch_false{nullptr};
/// Block immediate predecessors
std::vector<IR::Block*> imm_predecessors;
std::vector<Block*> imm_predecessors;
};
using BlockList = std::vector<Block*>;
[[nodiscard]] std::string DumpBlock(const Block& block);
[[nodiscard]] std::string DumpBlock(const Block& block,