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glibc/sysdeps/ieee754/flt-32
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Joseph Myers 3d6302a546 Fix i686-linux-gnu build with GCC mainline. 
Building with recent GCC mainline for i686-linux-gnu is failing with:

../sysdeps/ieee754/flt-32/k_rem_pio2f.c: In function '__kernel_rem_pio2f':
../sysdeps/ieee754/flt-32/k_rem_pio2f.c:186:28: error: 'fq[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
   fv = math_narrow_eval (fq[0]-fv);
                            ^

and

../sysdeps/ieee754/dbl-64/k_rem_pio2.c: In function '__kernel_rem_pio2':
../sysdeps/ieee754/dbl-64/k_rem_pio2.c:333:32: error: 'fq[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
       fv = math_narrow_eval (fq[0] - fv);
                                ^

These are similar to -Warray-bounds cases for which the DIAG_* macros
are already used in those files: the array element is in fact always
initialized, but the reasoning that it is depends on another array not
having been all zero at an earlier point, which depends on the
functions not being called with zero arguments.  Thus, this patch uses
DIAG_* to disable -Wmaybe-uninitialized for this code.

(The warning may be i686-specific because of math_narrow_eval somehow
perturbing what the compiler does with this code enough to cause the
warning.  I don't know why it doesn't appear for i686-gnu.)

Tested with build-many-glibcs.py that this fixes the i686 build in
this configuration.

	* sysdeps/ieee754/dbl-64/k_rem_pio2.c (__kernel_rem_pio2): Ignore
	-Wmaybe-uninitialized around access to fq[0].
	* sysdeps/ieee754/flt-32/k_rem_pio2f.c (__kernel_rem_pio2f):
	Likewise.
2018-05-22 16:55:04 +00:00
..
e_acosf.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_acoshf.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_asinf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
e_atan2f.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
e_atanhf.c Do not include math-barriers.h in math_private.h. 2018-05-11 15:11:38 +00:00
e_coshf.c Move math_narrow_eval to separate math-narrow-eval.h. 2018-05-09 00:15:10 +00:00
e_exp2f_data.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_exp2f.c Move math_narrow_eval to separate math-narrow-eval.h. 2018-05-09 00:15:10 +00:00
e_expf.c Move math_narrow_eval to separate math-narrow-eval.h. 2018-05-09 00:15:10 +00:00
e_fmodf.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
e_gammaf_r.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
e_hypotf.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_ilogbf.c Remove useless __ilogb*_finite aliases 2012-04-18 00:40:13 +02:00
e_j0f.c Do not include math-barriers.h in math_private.h. 2018-05-11 15:11:38 +00:00
e_j1f.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
e_jnf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
e_lgammaf_r.c Move math_narrow_eval to separate math-narrow-eval.h. 2018-05-09 00:15:10 +00:00
e_log2f_data.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_log2f.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_log10f.c Use fabs(f/l) rather than __fabs 2017-09-29 18:54:24 +01:00
e_logf_data.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_logf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_powf_log2_data.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_powf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_rem_pio2f.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
e_remainderf.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
e_sinhf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
e_sqrtf.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
k_cosf.c Remove trailing whitespace. 2013-06-05 20:44:03 +00:00
k_rem_pio2f.c Fix i686-linux-gnu build with GCC mainline. 2018-05-22 16:55:04 +00:00
k_sinf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
k_tanf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
lgamma_negf.c Move math_narrow_eval to separate math-narrow-eval.h. 2018-05-09 00:15:10 +00:00
lgamma_productf.c Fix lgamma (negative) inaccuracy (bug 2542, bug 2543, bug 2558). 2015-09-10 22:27:58 +00:00
math_config.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
math_errf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpn2flt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_asinhf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
s_atanf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
s_cbrtf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_ceilf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_copysignf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_cosf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_erff.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
s_expm1f.c Do not include math-barriers.h in math_private.h. 2018-05-11 15:11:38 +00:00
s_fabsf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_finitef.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
s_floorf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_fpclassifyf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_frexpf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_fromfpf_main.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fromfpf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_fromfpxf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_getpayloadf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_isinff.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_isnanf.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
s_issignalingf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_llrintf.c Move math_narrow_eval to separate math-narrow-eval.h. 2018-05-09 00:15:10 +00:00
s_llroundf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_log1pf.c Do not include math-barriers.h in math_private.h. 2018-05-11 15:11:38 +00:00
s_logbf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_lrintf.c Move math_narrow_eval to separate math-narrow-eval.h. 2018-05-09 00:15:10 +00:00
s_lroundf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_modff.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_nearbyintf.c Do not include math-barriers.h in math_private.h. 2018-05-11 15:11:38 +00:00
s_nextafterf.c Do not include math-barriers.h in math_private.h. 2018-05-11 15:11:38 +00:00
s_nextupf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
s_remquof.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_rintf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_roundevenf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_roundf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_scalblnf.c [BZ #6803] Set errno for scalbln, scalbn 2014-06-20 07:48:20 +05:30
s_scalbnf.c Make scalbn set errno (bug 6803). 2015-09-16 21:11:00 +00:00
s_setpayloadf_main.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_setpayloadf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_setpayloadsigf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_signbitf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_sincosf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_sincosf.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_sinf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_tanf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_tanhf.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
s_totalorderf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_totalordermagf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_truncf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_ufromfpf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
s_ufromfpxf.c Use libm_alias_float in flt-32. 2017-09-22 20:24:12 +00:00
w_exp2f.c Do not wrap expf and exp2f 2017-10-02 14:38:54 +01:00
w_expf.c Do not wrap expf and exp2f 2017-10-02 14:38:54 +01:00
w_log2f.c Do not wrap logf, log2f and powf 2017-10-02 14:39:38 +01:00
w_logf.c Do not wrap logf, log2f and powf 2017-10-02 14:39:38 +01:00
w_powf.c Do not wrap logf, log2f and powf 2017-10-02 14:39:38 +01:00