src/tint/lang/core/ir/if.cc

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#include "src/tint/lang/core/ir/if.h"

#include "src/tint/lang/core/ir/clone_context.h"
#include "src/tint/lang/core/ir/module.h"
#include "src/tint/lang/core/ir/multi_in_block.h"
#include "src/tint/utils/ice/ice.h"

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

namespace tint::core::ir {

If::If() = default;

If::If(Value* cond, ir::Block* t, ir::Block* f) : true_(t), false_(f) {
    TINT_ASSERT(true_);
    TINT_ASSERT(false_);

    AddOperand(If::kConditionOperandOffset, cond);

    if (true_) {
        true_->SetParent(this);
    }
    if (false_) {
        false_->SetParent(this);
    }
}

If::~If() = default;

void If::ForeachBlock(const std::function<void(ir::Block*)>& cb) {
    if (true_) {
        cb(true_);
    }
    if (false_) {
        cb(false_);
    }
}

If* If::Clone(CloneContext& ctx) {
    auto* cond = ctx.Remap(Condition());
    auto* new_true = ctx.ir.blocks.Create<ir::Block>();
    auto* new_false = ctx.ir.blocks.Create<ir::Block>();

    auto* new_if = ctx.ir.instructions.Create<If>(cond, new_true, new_false);
    ctx.Replace(this, new_if);

    true_->CloneInto(ctx, new_true);
    false_->CloneInto(ctx, new_false);

    new_if->SetResults(ctx.Clone(results_));

    return new_if;
}

void If::SetTrue(ir::Block* block) {
    if (true_ && true_->Parent() == this) {
        true_->SetParent(nullptr);
    }
    true_ = block;
    if (block) {
        block->SetParent(this);
    }
}

void If::SetFalse(ir::Block* block) {
    if (false_ && false_->Parent() == this) {
        false_->SetParent(nullptr);
    }
    false_ = block;
    if (block) {
        block->SetParent(this);
    }
}

}  // namespace tint::core::ir