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Adding better register tracking through locals and fixing branches.

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LLVM does an amazing job of optimizing this. There are many opportunities
to make it better, too, by preventing spilling where not required or only
spilling/filling things when needed.
This commit is contained in:
Ben Vanik
2013-01-25 00:32:42 -08:00
parent 47481fecf7
commit dcb958de54
9 changed files with 440 additions and 219 deletions
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25
include/xenia/cpu/codegen/function_generator.h
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@@ -44,16 +44,23 @@ public:
void GenerateBasicBlocks();
llvm::BasicBlock* GetBasicBlock(uint32_t address);
llvm::BasicBlock* GetNextBasicBlock();
llvm::BasicBlock* GetReturnBasicBlock();
llvm::Function* GetFunction(sdb::FunctionSymbol* fn);
int GenerateIndirectionBranch(uint32_t cia, llvm::Value* target,
bool lk, bool likely_local);
llvm::Value* LoadStateValue(uint32_t offset, llvm::Type* type,
const char* name = "");
void StoreStateValue(uint32_t offset, llvm::Type* type, llvm::Value* value);
llvm::Value* cia_value();
void FlushRegisters();
llvm::Value* SetupRegisterLocal(uint32_t offset, llvm::Type* type,
const char* name);
void FillRegisters();
void SpillRegisters();
llvm::Value* xer_value();
void update_xer_value(llvm::Value* value);
@@ -74,6 +81,7 @@ public:
void WriteMemory(llvm::Value* addr, uint32_t size, llvm::Value* value);
private:
void GenerateSharedBlocks();
void GenerateBasicBlock(sdb::FunctionBlock* block, llvm::BasicBlock* bb);
xe_memory_ref memory_;
@@ -83,6 +91,9 @@ private:
llvm::Module* gen_module_;
llvm::Function* gen_fn_;
sdb::FunctionBlock* fn_block_;
llvm::BasicBlock* return_block_;
llvm::BasicBlock* internal_indirection_block_;
llvm::BasicBlock* external_indirection_block_;
llvm::BasicBlock* bb_;
llvm::IRBuilder<>* builder_;
@@ -92,19 +103,15 @@ private:
uint32_t cia_;
struct {
llvm::Value* indirection_target;
llvm::Value* indirection_cia;
llvm::Value* xer;
bool xer_dirty;
llvm::Value* lr;
bool lr_dirty;
llvm::Value* ctr;
bool ctr_dirty;
llvm::Value* cr;
bool cr_dirty;
llvm::Value* gpr[32];
uint32_t gpr_dirty_bits;
} values_;
} locals_;
};