// Copyright 2022 The Dawn & Tint Authors
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#include "src/tint/lang/core/ir/instruction.h"

#include "src/tint/lang/core/ir/block.h"
#include "src/tint/utils/ice/ice.h"

TINT_INSTANTIATE_TYPEINFO(tint::core::ir::Instruction);

namespace tint::core::ir {

Instruction::Instruction() = default;

Instruction::~Instruction() = default;

void Instruction::Destroy() {
    TINT_ASSERT(Alive());
    if (Block()) {
        Remove();
    }
    for (auto* result : Results()) {
        result->SetInstruction(nullptr);
        result->Destroy();
    }
    flags_.Add(Flag::kDead);
}

void Instruction::InsertBefore(Instruction* before) {
    TINT_ASSERT(before);
    TINT_ASSERT(before->Block() != nullptr);
    before->Block()->InsertBefore(before, this);
}

void Instruction::InsertAfter(Instruction* after) {
    TINT_ASSERT(after);
    TINT_ASSERT(after->Block() != nullptr);
    after->Block()->InsertAfter(after, this);
}

void Instruction::ReplaceWith(Instruction* replacement) {
    TINT_ASSERT(replacement);
    TINT_ASSERT(Block() != nullptr);
    Block()->Replace(this, replacement);
}

void Instruction::Remove() {
    TINT_ASSERT(Block() != nullptr);
    Block()->Remove(this);
}

InstructionResult* Instruction::DetachResult() {
    TINT_ASSERT(Results().Length() == 1u);
    auto* result = Results()[0];
    SetResults({});
    return result;
}

}  // namespace tint::core::ir