75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2014 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include "xenia/cpu/compiler/passes/finalization_pass.h"
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#include "xenia/base/profiling.h"
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#include "xenia/cpu/backend/backend.h"
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#include "xenia/cpu/compiler/compiler.h"
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#include "xenia/cpu/processor.h"
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namespace xe {
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namespace cpu {
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namespace compiler {
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namespace passes {
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// TODO(benvanik): remove when enums redefined.
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using namespace xe::cpu::hir;
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using xe::cpu::hir::HIRBuilder;
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FinalizationPass::FinalizationPass() : CompilerPass() {}
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FinalizationPass::~FinalizationPass() {}
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bool FinalizationPass::Run(HIRBuilder* builder) {
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// Process the HIR and prepare it for lowering.
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// After this is done the HIR should be ready for emitting.
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auto arena = builder->arena();
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uint16_t block_ordinal = 0;
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auto block = builder->first_block();
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while (block) {
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block->ordinal = block_ordinal++;
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// Ensure all labels have names.
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auto label = block->label_head;
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while (label) {
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if (!label->name) {
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const size_t label_len = 6 + 4 + 1;
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char* name = reinterpret_cast<char*>(arena->Alloc(label_len));
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snprintf(name, label_len, "_label%d", label->id);
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label->name = name;
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}
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label = label->next;
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}
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// Remove unneeded jumps.
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auto tail = block->instr_tail;
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if (tail && tail->opcode == &OPCODE_BRANCH_info) {
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// Jump. Check target.
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auto target = tail->src1.label;
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if (target->block == block->next) {
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// Jumping to subsequent block. Remove.
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tail->Remove();
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}
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}
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block = block->next;
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}
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return true;
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}
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} // namespace passes
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} // namespace compiler
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} // namespace cpu
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} // namespace xe
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