Am 15.08.2014 um 11:32 schrieb Manuel López-Ibáñez:
> On 15 August 2014 11:07, Richard Biener <rguent...@suse.de> wrote:
>> - if (TREE_CODE (arg1) == INTEGER_CST)
>> + if (CONSTANT_CLASS_P (arg1) == INTEGER_CST)
>
> Huh?
>
> /* Nonzero if NODE represents a constant. */
>
> #define CONSTANT_CLASS_P(NODE)\
> (TREE_CODE_CLASS (TREE_CODE (NODE)) == tcc_constant)
>
> Sadly, we don't have a warning for this, but clang++ has one:
>
> test.c:4:16: warning: comparison of constant 2 with expression of type
> 'bool' is always false [-Wtautological-constant-out-of-range-compare]
> if ((a == 1) == 2) {
> ~~~~~~~~ ^ ~
>
> I'll open a PR
See also PR 44077
Franz
