Re: [PATCH] testsuite: Fix up gcc.dg/pr126464.c test [PR126464]

Hi again,

Any reason to not pick this change to releases/gcc-15?
The test is failing in r15-11477-gf3cf28e2da4d6b for arm-none-eabi.

Kind regards,
Torbjörn

On 2026-08-05 07:28, Torbjorn SVENSSON wrote:
> Hi Jakub,
> 
> I can confirm that this fixes the problem for arm-none-eabi.
> 
> Kind regards,
> Torbjörn
> 
> On 2026-08-04 17:34, Jakub Jelinek wrote:
>> On Tue, Aug 04, 2026 at 02:13:19PM +0200, Torbjorn SVENSSON wrote:
>>> This causes regression on most (all?) arm-none-eabi targets.
>>> /build/gcc_src/gcc/testsuite/gcc.dg/pr126464.c:56:3: warning: floating constant exceeds range of 'long double' [-Woverflow]
>>
>> This patch guards it with preprocessor tests whether such floating point
>> constants are representable.
>>
>> Tested on x86_64-linux, ok for trunk?
>>
>> 2026-08-04  Jakub Jelinek  <[email protected]>
>>
>>     PR tree-optimization/126464
>>     * gcc.dg/pr126464.c: Guard uses of 1e300 with
>>     __DBL_MAX_10_EXP__ >= 301 and uses of 1e4000L with
>>     __LDBL_MAX_10_EXP__ >= 4001.
>>
>> --- gcc/testsuite/gcc.dg/pr126464.c.jj    2026-07-30 09:56:33.400729346 +0200
>> +++ gcc/testsuite/gcc.dg/pr126464.c    2026-08-04 17:31:18.458149999 +0200
>> @@ -47,15 +47,19 @@ qux (long double x)
>>   int
>>   main ()
>>   {
>> +#if __DBL_MAX_10_EXP__ >= 301
>>     if (!__builtin_isinf ((double) 1e300)
>>         && __builtin_isinf ((float) 1e300)
>>         && (foo (-1e300) != -5e299
>>         || baz (1e300) != 5e299))
>>       __builtin_abort ();
>> +#endif
>> +#if __LDBL_MAX_10_EXP__ >= 4001
>>     if (!__builtin_isinf ((long double) 1e4000L)
>>         && __builtin_isinf ((double) 1e4000L)
>>         && (bar (1e4000L) != 5e3999L
>>         || qux (-1e4000L) != -5e3999L))
>>       __builtin_abort ();
>> +#endif
>>   }
>>
>>
>>     Jakub
>>
>