mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Richard Smith
fea6cf88fc
Combine the initialization, implicit conversion, and value category conversion functions into a single function. This substantially reduces the duplication between these steps, and ensures that we support the same set of conversions in all these contexts. This also fixes some issues where we would not use the proper value representation for tuples and structs after performing implicit conversions.
80 lines
2.7 KiB
C++
80 lines
2.7 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/sem_ir/node.h"
|
|
|
|
namespace Carbon::Check {
|
|
|
|
auto HandleIfConditionStart(Context& /*context*/, Parse::Node /*parse_node*/)
|
|
-> bool {
|
|
return true;
|
|
}
|
|
|
|
auto HandleIfCondition(Context& context, Parse::Node parse_node) -> bool {
|
|
// Convert the condition to `bool`.
|
|
auto cond_value_id = context.node_stack().PopExpression();
|
|
cond_value_id = ConvertToBoolValue(context, parse_node, cond_value_id);
|
|
|
|
// Create the then block and the else block, and branch to the right one. If
|
|
// there is no `else`, the then block will terminate with a branch to the
|
|
// else block, which will be reused as the resumption block.
|
|
auto then_block_id =
|
|
context.AddDominatedBlockAndBranchIf(parse_node, cond_value_id);
|
|
auto else_block_id = context.AddDominatedBlockAndBranch(parse_node);
|
|
|
|
// Start emitting the `then` block.
|
|
context.node_block_stack().Pop();
|
|
context.node_block_stack().Push(then_block_id);
|
|
context.AddCurrentCodeBlockToFunction();
|
|
|
|
context.node_stack().Push(parse_node, else_block_id);
|
|
return true;
|
|
}
|
|
|
|
auto HandleIfStatementElse(Context& context, Parse::Node parse_node) -> bool {
|
|
auto else_block_id = context.node_stack().Pop<Parse::NodeKind::IfCondition>();
|
|
|
|
// Switch to emitting the `else` block.
|
|
context.node_block_stack().Push(else_block_id);
|
|
context.AddCurrentCodeBlockToFunction();
|
|
|
|
context.node_stack().Push(parse_node);
|
|
return true;
|
|
}
|
|
|
|
auto HandleIfStatement(Context& context, Parse::Node parse_node) -> bool {
|
|
switch (auto kind = context.parse_tree().node_kind(
|
|
context.node_stack().PeekParseNode())) {
|
|
case Parse::NodeKind::IfCondition: {
|
|
// Branch from then block to else block, and start emitting the else
|
|
// block.
|
|
auto else_block_id =
|
|
context.node_stack().Pop<Parse::NodeKind::IfCondition>();
|
|
context.AddNode(SemIR::Node::Branch::Make(parse_node, else_block_id));
|
|
context.node_block_stack().Pop();
|
|
context.node_block_stack().Push(else_block_id);
|
|
break;
|
|
}
|
|
|
|
case Parse::NodeKind::IfStatementElse: {
|
|
// Branch from the then and else blocks to a new resumption block.
|
|
context.node_stack()
|
|
.PopAndDiscardSoloParseNode<Parse::NodeKind::IfStatementElse>();
|
|
context.AddConvergenceBlockAndPush(parse_node, /*num_blocks=*/2);
|
|
break;
|
|
}
|
|
|
|
default: {
|
|
CARBON_FATAL() << "Unexpected parse node at start of `if`: " << kind;
|
|
}
|
|
}
|
|
|
|
context.AddCurrentCodeBlockToFunction();
|
|
return true;
|
|
}
|
|
|
|
} // namespace Carbon::Check
|