motiejus/zig
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stage1: hot path for resolving types of primitives

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This is an attempt to save memory when building self-hosted.

before:
Total bytes allocated: 5.941 GiB, deallocated: 2.259 GiB, remaining: 3.681 GiB

after:
Total bytes allocated: 5.933 GiB, deallocated: 2.253 GiB, remaining: 3.680 GiB
This commit is contained in:
Andrew Kelley
2020-07-28 00:00:35 -07:00
parent 0965724e31
commit c37f273cb0
1 changed files with 14 additions and 0 deletions
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14
src/analyze.cpp
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@@ -1490,6 +1490,20 @@ static OnePossibleValue type_val_resolve_has_one_possible_value(CodeGen *g, ZigV
}
ZigType *analyze_type_expr(CodeGen *g, Scope *scope, AstNode *node) {
Error err;
// Hot path for simple identifiers, to avoid unnecessary memory allocations.
if (node->type == NodeTypeSymbol) {
Buf *variable_name = node->data.symbol_expr.symbol;
if (buf_eql_str(variable_name, "_"))
goto abort_hot_path;
ZigType *primitive_type;
if ((err = get_primitive_type(g, variable_name, &primitive_type))) {
goto abort_hot_path;
} else {
return primitive_type;
}
abort_hot_path:;
}
ZigValue *result = analyze_const_value(g, scope, node, g->builtin_types.entry_type,
nullptr, UndefBad);
if (type_is_invalid(result->type))