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Add GlobalInit to blocks to emit initialization instructions for globals (#3687)

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`GlobalInit` block is now static block within a `SemIR` which will be
used to emit initialization instructions for variables in the `Package`
scope.

inst_block_stack now has additional methods to handle `GlobalInit` block
separately, this block can be popped without being finalized allowing to
accumulate between all instances of variables.

At the end of the `check` phase, if this block is not empty , the
function `__global_init` will be added with this block being inserted
into it.

This block is pushed to `inst_block_scope` at the end `BindName`,
allowing instruction to be emitted into it, then popped at the semicolon
(VariableDecl).

This significantly changes the `SemIR` output, that's why this commit
updates a lot of the test cases.
This commit is contained in:
Gıyaseddin Tanrıkulu
2024-02-09 16:21:57 +00:00
committed by GitHub
parent 475ecca339
commit bdff7ccf28
94 changed files with 1256 additions and 604 deletions
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toolchain/check/context.cpp
+22
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@@ -502,6 +502,28 @@ auto Context::ParamOrArgEnd(Parse::NodeKind start_kind) -> SemIR::InstBlockId {
return ParamOrArgPop();
}
auto Context::FinalizeGlobalInit() -> void {
inst_block_stack().PushGlobalInit();
if (!inst_block_stack().PeekCurrentBlockContents().empty()) {
AddInst({Parse::NodeId::Invalid, SemIR::Return{}});
// Pop the GlobalInit block here to finalize it.
inst_block_stack().Pop();
// __global_init is only added if there are initialization instructions.
auto name_id = sem_ir().identifiers().Add("__global_init");
sem_ir().functions().Add(
{.name_id = SemIR::NameId::ForIdentifier(name_id),
.enclosing_scope_id = SemIR::NameScopeId::Package,
.implicit_param_refs_id = SemIR::InstBlockId::Empty,
.param_refs_id = SemIR::InstBlockId::Empty,
.return_type_id = SemIR::TypeId::Invalid,
.return_slot_id = SemIR::InstId::Invalid,
.body_block_ids = {SemIR::InstBlockId::GlobalInit}});
} else {
inst_block_stack().PopGlobalInit();
}
}
namespace {
// Worklist-based type completion mechanism.
//