http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59648
Bug ID: 59648
Summary: -O2 compilation of xorg-server-1.15.0 fails
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: nheghathivhistha at gmail dot com
Created attachment 31550
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31550&action=edit
Gzipped preprocessed events.c file
-O compilation is fine.
Gcc 4.9.0 trunk.
libtool: link: x86_64-pc-linux-gnu-gcc -std=gnu99 -DHAVE_DIX_CONFIG_H -Wall
-Wpointer-arith -Wmissing-declarations -Wformat=2 -Wstrict-prototypes
-Wmissing-prototypes -Wnested-externs -Wbad-function-cast
-Wold-style-definition -Wdeclaration-after-statement -Wunused -Wuninitialized
-Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wredundant-decls
-Werror=implicit -Werror=nonnull -Werror=init-self -Werror=main
-Werror=missing-braces -Werror=sequence-point -Werror=return-type
-Werror=trigraphs -Werror=array-bounds -Werror=write-strings -Werror=address
-Werror=int-to-pointer-cast -Werror=pointer-to-int-cast -fno-strict-aliasing
-fno-strict-aliasing -D_BSD_SOURCE -DHAS_FCHOWN -DHAS_STICKY_DIR_BIT
-I/usr/include/X11/dri -I/usr/include/libdrm -I/usr/include/pixman-1
-I/usr/include/freetype2
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/include
-I../include
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/Xext
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/composite
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/damageext
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/xfixes
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/Xi
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/mi
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/miext/sync
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/miext/shadow
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/miext/damage
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/render
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/randr
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/fb
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dbe
-I/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/present
-fvisibility=hidden -DHAVE_XORG_CONFIG_H -fvisibility=hidden
-I/usr/include/libdrm -O2 -ggdb -pipe -march=native -mtune=native -mno-sse4.2
-mno-sse4a -mno-avx -mno-3dnow -flto=4 -Wl,-O1 -Wl,-flto -O2 -ggdb -pipe
-march=native -mtune=native -mno-sse4.2 -mno-sse4a -mno-avx -mno-3dnow -flto=4
-Wl,-z -Wl,lazy -o input input.o -Wl,--as-needed ./.libs/libxservertest.a
-lnettle -ldl -ludev -lpciaccess -ldrm -lpixman-1 -lXfont -lXau -lxshmfence
-lXdmcp -lGL -lpthread -lm
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/xkb/xkbInit.c:690:22:
warning: type of 'XkbDfltAccessXOptions' does not match original declaration
[enabled by default]
extern unsigned char XkbDfltAccessXOptions;
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/xkb/xkbAccessX.c:58:16:
note: previously declared here
unsigned short XkbDfltAccessXOptions =
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:
In function 'MatchForType':
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:3810:9:
warning: 'grabtype' may be used uninitialized in this function
[-Wmaybe-uninitialized]
int grabtype;
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:3834:15:
warning: 'evtype' may be used uninitialized in this function
[-Wmaybe-uninitialized]
tmp->type = evtype;
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:3811:9:
note: 'evtype' was declared here
int evtype;
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:3808:21:
warning: 'match' may be used uninitialized in this function
[-Wmaybe-uninitialized]
enum MatchFlags match;
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/ptrveloc.c:
In function 'AccelSetProfileProperty':
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/ptrveloc.c:204:35:
warning: 'profile' may be used uninitialized in this function
[-Wmaybe-uninitialized]
if (GetAccelerationProfile(vel, profile) == NULL)
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/ptrveloc.c:188:9:
note: 'profile' was declared here
int profile, *ptr = &profile;
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:
In function 'XineramaConfineCursorToWindow.constprop':
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:625:35:
warning: iteration 16 invokes undefined behavior
[-Waggressive-loop-optimizations]
off_x = screenInfo.screens[i]->x;
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:615:11:
note: containing loop
while (i--) {
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:611:49:
error: array subscript is below array bounds [-Werror=array-bounds]
RegionCopy(&pSprite->Reg1, &pSprite->windows[i]->borderSize);
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:612:31:
error: array subscript is below array bounds [-Werror=array-bounds]
off_x = screenInfo.screens[i]->x;
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:616:39:
error: array subscript is below array bounds [-Werror=array-bounds]
x = off_x - screenInfo.screens[i]->x;
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:623:38:
error: array subscript is below array bounds [-Werror=array-bounds]
&pSprite->windows[i]->borderSize);
^
/var/tmp/portage/x11-base/xorg-server-1.15.0/work/xorg-server-1.15.0/dix/events.c:625:35:
error: array subscript is below array bounds [-Werror=array-bounds]
off_x = screenInfo.screens[i]->x;
^
lto1: some warnings being treated as errors
