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[qfcc] Fix indexed pointer vector indexing

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The array access code was loading the vector, modifying the element,
then forgetting to write the modified vector back to whence it came.
However, that would be rather sub-optimal, so now when the vector is
accessed by a pointer, the array code switches to field access to get at
the vector element thus avoiding the need to copy the whole vector.
This commit is contained in:
Bill Currie 2023-05-17 01:09:31 +09:00
parent 0d78a865c6
commit 8d4602ec61
1 changed files with 5 additions and 0 deletions
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5
tools/qfcc/source/expr.c
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@ -2503,6 +2503,11 @@ array_expr (expr_t *array, expr_t *index)
base = new_int_expr (0); base = new_int_expr (0);
} else { } else {
ele_type = ev_types[array_type->type]; ele_type = ev_types[array_type->type];
if (array->type == ex_uexpr && array->e.expr.op == '.') {
expr_t *vec = offset_pointer_expr (array->e.expr.e1, index);
vec = cast_expr (pointer_type (ele_type), vec);
return unary_expr ('.', vec);
}
base = new_int_expr (0); base = new_int_expr (0);
} }
scale = new_int_expr (type_size (ele_type)); scale = new_int_expr (type_size (ele_type));