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self-hosted: implement Decl lookup

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* Take advantage of coercing anonymous struct literals to struct types.
 * Reworks Module to favor Zig source as the primary use case.
   Breaks ZIR compilation, which will have to be restored in a future commit.
 * Decl uses src_index rather then src, pointing to an AST Decl node
   index, or ZIR Module Decl index, rather than a byte offset.
 * ZIR instructions have an `analyzed_inst` field instead of Module
   having a hash table.
 * Module.Fn loses the `fn_type` field since it is redundant with
   its `owner_decl` `TypedValue` type.
 * Implement Type and Value copying. A ZIR Const instruction's TypedValue
   is copied to the Decl arena during analysis, which allows freeing the
   ZIR text instructions post-analysis.
 * Don't flush the ELF file if there are compilation errors.
 * Function return types allow arbitrarily complex expressions.
 * AST->ZIR for function calls and return statements.
This commit is contained in:
Andrew Kelley
2020-06-17 04:29:54 -04:00
parent b4eac0414a
commit 7e58c56ca7
10 changed files with 866 additions and 429 deletions
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6
src/codegen.cpp
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@@ -7473,6 +7473,12 @@ static LLVMValueRef gen_const_val(CodeGen *g, ZigValue *const_val, const char *n
continue;
}
ZigValue *field_val = const_val->data.x_struct.fields[i];
if (field_val == nullptr) {
add_node_error(g, type_struct_field->decl_node,
buf_sprintf("compiler bug: generating const value for struct field '%s'",
buf_ptr(type_struct_field->name)));
codegen_report_errors_and_exit(g);
}
ZigType *field_type = field_val->type;
assert(field_type != nullptr);
if ((err = ensure_const_val_repr(nullptr, g, nullptr, field_val, field_type))) {