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authorMartin Jansa <Martin.Jansa@gmail.com>2018-10-02 15:38:43 +0000
committerJoseph Myers <joseph@codesourcery.com>2018-10-02 15:40:57 +0000
commit4a06ceea33ecc220bbfe264d8f1e74de2f04e90d (patch)
treeb5713f32622f034efc25c5266e0824e3f134c908 /ChangeLog
parenta06fc4a53385709f80a866075f794646810b831e (diff)
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sysdeps/ieee754/soft-fp: ignore maybe-uninitialized with -O [BZ #19444]
* with -O, -O1, -Os it fails with: In file included from ../soft-fp/soft-fp.h:318, from ../sysdeps/ieee754/soft-fp/s_fdiv.c:28: ../sysdeps/ieee754/soft-fp/s_fdiv.c: In function '__fdiv': ../soft-fp/op-2.h:98:25: error: 'R_f1' may be used uninitialized in this function [-Werror=maybe-uninitialized] X##_f0 = (X##_f1 << (_FP_W_TYPE_SIZE - (N)) | X##_f0 >> (N) \ ^~ ../sysdeps/ieee754/soft-fp/s_fdiv.c:38:14: note: 'R_f1' was declared here FP_DECL_D (R); ^ ../soft-fp/op-2.h:37:36: note: in definition of macro '_FP_FRAC_DECL_2' _FP_W_TYPE X##_f0 _FP_ZERO_INIT, X##_f1 _FP_ZERO_INIT ^ ../soft-fp/double.h:95:24: note: in expansion of macro '_FP_DECL' # define FP_DECL_D(X) _FP_DECL (2, X) ^~~~~~~~ ../sysdeps/ieee754/soft-fp/s_fdiv.c:38:3: note: in expansion of macro 'FP_DECL_D' FP_DECL_D (R); ^~~~~~~~~ ../soft-fp/op-2.h:101:17: error: 'R_f0' may be used uninitialized in this function [-Werror=maybe-uninitialized] : (X##_f0 << (_FP_W_TYPE_SIZE - (N))) != 0)); \ ^~ ../sysdeps/ieee754/soft-fp/s_fdiv.c:38:14: note: 'R_f0' was declared here FP_DECL_D (R); ^ ../soft-fp/op-2.h:37:14: note: in definition of macro '_FP_FRAC_DECL_2' _FP_W_TYPE X##_f0 _FP_ZERO_INIT, X##_f1 _FP_ZERO_INIT ^ ../soft-fp/double.h:95:24: note: in expansion of macro '_FP_DECL' # define FP_DECL_D(X) _FP_DECL (2, X) ^~~~~~~~ ../sysdeps/ieee754/soft-fp/s_fdiv.c:38:3: note: in expansion of macro 'FP_DECL_D' FP_DECL_D (R); ^~~~~~~~~ Build tested with Yocto for ARM, AARCH64, X86, X86_64, PPC, MIPS, MIPS64 with -O, -O1, -Os. For AARCH64 it needs one more fix in locale for -Os. [BZ #19444] * sysdeps/ieee754/soft-fp/s_fdiv.c: Include <libc-diag.h> and use DIAG_PUSH_NEEDS_COMMENT, DIAG_IGNORE_NEEDS_COMMENT and DIAG_POP_NEEDS_COMMENT to disable -Wmaybe-uninitialized.
Diffstat (limited to 'ChangeLog')
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diff --git a/ChangeLog b/ChangeLog
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+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2018-10-02 Martin Jansa <Martin.Jansa@gmail.com>
+
+ [BZ #19444]
+ * sysdeps/ieee754/soft-fp/s_fdiv.c: Include <libc-diag.h> and use
+ DIAG_PUSH_NEEDS_COMMENT, DIAG_IGNORE_NEEDS_COMMENT and
+ DIAG_POP_NEEDS_COMMENT to disable -Wmaybe-uninitialized.
+
2018-10-02 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/unix/sysv/linux/fd_to_filename.h: Add missing includes.