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From: Andreas Schwab <schwab@suse.de> To: gcc-gnats@gcc.gnu.org Subject: optimization/6631: Miscompiled structure access Date: Fri, 10 May 2002 18:26:00 -0000 [thread overview] Message-ID: <200205110123.g4B1NrsW019847@sykes.suse.de> (raw) >Number: 6631 >Category: optimization >Synopsis: Miscompiled structure access >Confidential: no >Severity: critical >Priority: medium >Responsible: unassigned >State: open >Class: wrong-code >Submitter-Id: net >Arrival-Date: Fri May 10 18:26:01 PDT 2002 >Closed-Date: >Last-Modified: >Originator: >Release: 3.1 20020506 (prerelease) >Organization: >Environment: System: Linux sykes 2.4.18-SMP #1 SMP Sat Apr 13 18:56:25 UTC 2002 ia64 unknown unknown GNU/Linux Architecture: ia64 host: ia64-suse-linux-gnu build: ia64-suse-linux-gnu target: ia64-suse-linux-gnu configured with: ../configure --enable-threads=posix --prefix=/usr --with-local-prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib --enable-languages=c,c++,f77,objc,java,ada --with-gxx-include-dir=/usr/include/g++ --with-slibdir=/lib --with-system-zlib --enable-shared --enable-checking ia64-suse-linux >Description: life_analysis misoptimizes out code to initialize the fields of a structure. >How-To-Repeat: $ cat qsize.cpp void abort (void); struct QSize { QSize(); QSize( int w, int h ); int wd, ht; friend inline const QSize operator+( const QSize &, const QSize & ); }; inline QSize::QSize() { wd = ht = -1; } inline QSize::QSize( int w, int h ) { wd = w; ht = h; } inline const QSize operator+( const QSize & s1, const QSize & s2 ) { return QSize(s1.wd+s2.wd, s1.ht+s2.ht); } QSize minimumSize() { return QSize (100, 200); } QSize totalMinimumSize() { QSize s = minimumSize(); return s + QSize( 0, 0 ); } int main() { QSize s = totalMinimumSize(); if (s.wd != 100 || s.ht != 200) abort (); } $ gcc -O -v qsize.cpp Reading specs from /usr/lib/gcc-lib/ia64-suse-linux/3.1/specs Configured with: ../configure --enable-threads=posix --prefix=/usr --with-local-prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib --enable-languages=c,c++,f77,objc,java,ada --with-gxx-include-dir=/usr/include/g++ --with-slibdir=/lib --with-system-zlib --enable-shared --enable-checking ia64-suse-linux Thread model: posix gcc version 3.1 20020506 (prerelease) /usr/lib/gcc-lib/ia64-suse-linux/3.1/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=0 -D__gnu_linux__ -D__linux -D__linux__ -D_LONGLONG -Dlinux -Dunix -D__gnu_linux__ -D__linux -D__linux__ -D_LONGLONG -D__linux__ -D__unix__ -D__linux -D__unix -Asystem=linux -D__OPTIMIZE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=ia64 -Amachine=ia64 -D__ia64 -D__ia64__ -D_LP64 -D__LP64__ -D__ELF__ -D__LONG_MAX__=9223372036854775807L qsize.cpp -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase qsize.cpp -O -version -o /tmp/ccd2tZb1.s GNU CPP version 3.1 20020506 (prerelease) (cpplib) (IA-64) Linux GNU C++ version 3.1 20020506 (prerelease) (ia64-suse-linux) compiled by GNU C version 3.1 20020506 (prerelease). #include "..." search starts here: #include <...> search starts here: /usr/include/g++ /usr/include/g++/ia64-suse-linux /usr/include/g++/backward /usr/local/include /usr/lib/gcc-lib/ia64-suse-linux/3.1/include /usr/ia64-suse-linux/include /usr/include End of search list. /usr/lib/gcc-lib/ia64-suse-linux/3.1/../../../../ia64-suse-linux/bin/as -x -o /tmp/cci5U9Z1.o /tmp/ccd2tZb1.s /usr/lib/gcc-lib/ia64-suse-linux/3.1/collect2 -dynamic-linker /lib/ld-linux-ia64.so.2 /usr/lib/gcc-lib/ia64-suse-linux/3.1/../../../crt1.o /usr/lib/gcc-lib/ia64-suse-linux/3.1/../../../crti.o /usr/lib/gcc-lib/ia64-suse-linux/3.1/crtbegin.o -L/usr/lib/gcc-lib/ia64-suse-linux/3.1 -L/usr/lib/gcc-lib/ia64-suse-linux/3.1/../../../../ia64-suse-linux/lib -L/usr/lib/gcc-lib/ia64-suse-linux/3.1/../../.. /tmp/cci5U9Z1.o -lgcc -lgcc_eh -lc -lgcc -lgcc_eh /usr/lib/gcc-lib/ia64-suse-linux/3.1/crtend.o /usr/lib/gcc-lib/ia64-suse-linux/3.1/../../../crtn.o You have new mail in /suse/schwab/Mail/.incoming $ ./a.out Aborted >Fix: >Release-Note: >Audit-Trail: >Unformatted:
next reply other threads:[~2002-05-11 1:26 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-05-10 18:26 Andreas Schwab [this message] 2002-05-13 0:14 jakub 2002-10-08 11:46 Janis Johnson 2002-10-14 14:20 mmitchel
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