mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Jon Ross-Perkins
99696b9812
This is for consistency with #4120. Similar to that, we can use overloads on the typed NodeId rather than individually named handlers. There isn't the same caller benefit here though, since the calls from check.cpp are already boilerplate.
78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#include "toolchain/check/context.h"
|
|
#include "toolchain/check/convert.h"
|
|
#include "toolchain/check/handle.h"
|
|
|
|
namespace Carbon::Check {
|
|
|
|
auto HandleParseNode(Context& context, Parse::IfExprIfId node_id) -> bool {
|
|
// Alias node_id for if/then/else consistency.
|
|
auto& if_node = node_id;
|
|
|
|
auto [cond_node, cond_value_id] = context.node_stack().PopExprWithNodeId();
|
|
|
|
// Convert the condition to `bool`, and branch on it.
|
|
cond_value_id = ConvertToBoolValue(context, if_node, cond_value_id);
|
|
context.node_stack().Push(cond_node, cond_value_id);
|
|
auto then_block_id =
|
|
context.AddDominatedBlockAndBranchIf(if_node, cond_value_id);
|
|
auto else_block_id = context.AddDominatedBlockAndBranch(if_node);
|
|
|
|
// Start emitting the `then` block.
|
|
context.inst_block_stack().Pop();
|
|
context.inst_block_stack().Push(then_block_id);
|
|
context.AddCurrentCodeBlockToFunction(node_id);
|
|
|
|
context.node_stack().Push(if_node, else_block_id);
|
|
return true;
|
|
}
|
|
|
|
auto HandleParseNode(Context& context, Parse::IfExprThenId node_id) -> bool {
|
|
auto then_value_id = context.node_stack().PopExpr();
|
|
auto else_block_id = context.node_stack().Peek<Parse::NodeKind::IfExprIf>();
|
|
|
|
// Convert the first operand to a value.
|
|
then_value_id = ConvertToValueExpr(context, then_value_id);
|
|
|
|
// Start emitting the `else` block.
|
|
context.inst_block_stack().Push(else_block_id);
|
|
context.AddCurrentCodeBlockToFunction(node_id);
|
|
|
|
context.node_stack().Push(node_id, then_value_id);
|
|
return true;
|
|
}
|
|
|
|
auto HandleParseNode(Context& context, Parse::IfExprElseId node_id) -> bool {
|
|
// Alias node_id for if/then/else consistency.
|
|
auto& else_node = node_id;
|
|
|
|
auto else_value_id = context.node_stack().PopExpr();
|
|
auto then_value_id = context.node_stack().Pop<Parse::NodeKind::IfExprThen>();
|
|
auto [if_node, _] =
|
|
context.node_stack().PopWithNodeId<Parse::NodeKind::IfExprIf>();
|
|
auto cond_value_id = context.node_stack().PopExpr();
|
|
|
|
// Convert the `else` value to the `then` value's type, and finish the `else`
|
|
// block.
|
|
// TODO: Find a common type, and convert both operands to it instead.
|
|
auto result_type_id = context.insts().Get(then_value_id).type_id();
|
|
else_value_id =
|
|
ConvertToValueOfType(context, else_node, else_value_id, result_type_id);
|
|
|
|
// Create a resumption block and branches to it.
|
|
auto chosen_value_id = context.AddConvergenceBlockWithArgAndPush(
|
|
if_node, {else_value_id, then_value_id});
|
|
context.SetBlockArgResultBeforeConstantUse(chosen_value_id, cond_value_id,
|
|
then_value_id, else_value_id);
|
|
context.AddCurrentCodeBlockToFunction(node_id);
|
|
|
|
// Push the result value.
|
|
context.node_stack().Push(else_node, chosen_value_id);
|
|
return true;
|
|
}
|
|
|
|
} // namespace Carbon::Check
|