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From 0efa7fd1c800277d5323d05cb245c0536fe9ce22 Mon Sep 17 00:00:00 2001
From: Martin Jansa <Martin.Jansa@gmail.com>
Date: Sun, 16 Sep 2018 12:39:22 +0000
Subject: [PATCH] soft-fp: ignore maybe-uninitialized
* with -O 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);
^~~~~~~~~
Upstream-Status: Submitted [https://www.sourceware.org/ml/libc-alpha/2018-09/msg00300.html]
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
---
soft-fp/op-2.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/soft-fp/op-2.h b/soft-fp/op-2.h
index 6020d663d4..6672337949 100644
--- a/soft-fp/op-2.h
+++ b/soft-fp/op-2.h
@@ -92,6 +92,8 @@
X##_f1 = 0; \
}))
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#define _FP_FRAC_SRS_2(X, N, sz) \
(void) (((N) < _FP_W_TYPE_SIZE) \
? ({ \
@@ -109,6 +111,7 @@
| X##_f0) != 0)); \
X##_f1 = 0; \
}))
+#pragma GCC diagnostic pop
#define _FP_FRAC_ADDI_2(X, I) \
__FP_FRAC_ADDI_2 (X##_f1, X##_f0, I)
--
2.17.1
|
