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https://github.com/carbon-language/carbon-lang.git
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Jon Ross-Perkins
311b4ff03d
This in particular uses free functions because it's likely to end up more consistent with types (versus a wrapper object for InstStore). Note, this is unlikely to have a performance impact, but if it does, we can look into related approaches (and we've already discussed using LTO). Renames `PendingBlock::AddInst` to `PendingBlock::Add` because `MakeElementAccessInst` expects the matching name to exist.
47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "toolchain/check/subpattern.h"
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#include "toolchain/check/inst.h"
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namespace Carbon::Check {
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auto BeginSubpattern(Context& context) -> void {
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context.inst_block_stack().Push();
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context.region_stack().PushRegion(context.inst_block_stack().PeekOrAdd());
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}
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auto EndSubpatternAsExpr(Context& context, SemIR::InstId result_id)
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-> SemIR::ExprRegionId {
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if (context.region_stack().PeekRegion().size() > 1) {
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// End the exit block with a branch to a successor block, whose contents
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// will be determined later.
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AddInst(context,
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SemIR::LocIdAndInst::NoLoc<SemIR::Branch>(
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{.target_id = context.inst_blocks().AddDefaultValue()}));
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} else {
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// This single-block region will be inserted as a SpliceBlock, so we don't
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// need control flow out of it.
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}
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auto block_id = context.inst_block_stack().Pop();
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CARBON_CHECK(block_id == context.region_stack().PeekRegion().back());
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// TODO: Is it possible to validate that this region is genuinely
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// single-entry, single-exit?
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return context.sem_ir().expr_regions().Add(
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{.block_ids = context.region_stack().PopRegion(),
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.result_id = result_id});
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}
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auto EndSubpatternAsEmpty(Context& context) -> void {
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auto block_id = context.inst_block_stack().Pop();
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CARBON_CHECK(block_id == context.region_stack().PeekRegion().back());
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CARBON_CHECK(context.region_stack().PeekRegion().size() == 1);
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CARBON_CHECK(context.inst_blocks().Get(block_id).empty());
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context.region_stack().PopAndDiscardRegion();
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}
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} // namespace Carbon::Check
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