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stage1: Fix constant folding of single-element enums

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Fill in the correct value instead of leaving everything uninitialized.
This problem can be noticed in behavior/union.zig but it's masked by
some other "optimization" kicking in at the wrong time, the following
commits will address that.
This commit is contained in:
LemonBoy 2020-12-05 18:52:25 +01:00
parent b6b7a6401c
commit 865d6df03e
1 changed files with 5 additions and 0 deletions
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5
src/stage1/analyze.cpp
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@ -6122,6 +6122,11 @@ ZigValue *get_the_one_possible_value(CodeGen *g, ZigType *type_entry) {
result->data.x_ptr.mut = ConstPtrMutComptimeConst; result->data.x_ptr.mut = ConstPtrMutComptimeConst;
result->data.x_ptr.special = ConstPtrSpecialRef; result->data.x_ptr.special = ConstPtrSpecialRef;
result->data.x_ptr.data.ref.pointee = get_the_one_possible_value(g, result->type->data.pointer.child_type); result->data.x_ptr.data.ref.pointee = get_the_one_possible_value(g, result->type->data.pointer.child_type);
} else if (result->type->id == ZigTypeIdEnum) {
ZigType *enum_type = result->type;
assert(enum_type->data.enumeration.src_field_count == 1);
TypeEnumField *only_field = &result->type->data.enumeration.fields[0];
bigint_init_bigint(&result->data.x_enum_tag, &only_field->value);
} }
g->one_possible_values.put(type_entry, result); g->one_possible_values.put(type_entry, result);
return result; return result;