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* [Bug optimization/11066] New: error in the optimization of packed structures @ 2003-06-02 17:44 jourgun@club-internet.fr 2003-06-02 17:58 ` [Bug optimization/11066] " pinskia@physics.uc.edu ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: jourgun@club-internet.fr @ 2003-06-02 17:44 UTC (permalink / raw) To: gcc-bugs PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11066 Summary: error in the optimization of packed structures Product: gcc Version: 3.2.2 Status: UNCONFIRMED Severity: major Priority: P2 Component: optimization AssignedTo: unassigned@gcc.gnu.org ReportedBy: jourgun@club-internet.fr CC: gcc-bugs@gcc.gnu.org error in the optimization of packed structures, when using -O2 or -O3. preprossesor file: # 1 "test.c" # 1 "<built-in>" # 1 "<command line>" # 1 "c:/djgpp/lib/gcc-lib/djgpp/3.23/djgpp.ver" 1 # 1 "c:/djgpp/include/sys/version.h" 1 3 # 2 "c:/djgpp/lib/gcc-lib/djgpp/3.23/djgpp.ver" 2 # 2 "<command line>" 2 # 1 "test.c" unsigned long long GateDescriptor(Offset,Segment,TypeDPL,ParamCount) unsigned long Offset; unsigned short Segment; unsigned char TypeDPL,ParamCount; { typedef struct { unsigned short Offset0_15; unsigned short Segment; unsigned char ParamCount; unsigned char TypeDPL; unsigned short Offset16_31; }Tdescripteur __attribute__ ((packed)); Tdescripteur Descripteur; Descripteur.Offset0_15=Offset; Descripteur.Offset16_31=Offset>>16; Descripteur.Segment=Segment; Descripteur.TypeDPL=TypeDPL; Descripteur.ParamCount=ParamCount; return *(unsigned long long*)&Descripteur; } int main(void){ printf("%llX",GateDescriptor(0x65B,0x08,0xEF,0)); getchar(); } Normaly, we would see : EF000008065B but we see: EF000000065B the complete command line is: gcc test.c -o test.exe -O2 I am working on DJGPP on Windows XP. ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug optimization/11066] error in the optimization of packed structures 2003-06-02 17:44 [Bug optimization/11066] New: error in the optimization of packed structures jourgun@club-internet.fr @ 2003-06-02 17:58 ` pinskia@physics.uc.edu 2005-06-05 8:24 ` [Bug rtl-optimization/11066] " pinskia at gcc dot gnu dot org 2005-06-05 8:24 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia@physics.uc.edu @ 2003-06-02 17:58 UTC (permalink / raw) To: gcc-bugs PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11066 pinskia@physics.uc.edu changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |INVALID ------- Additional Comments From pinskia@physics.uc.edu 2003-06-02 17:58 ------- This is not a bug, you are violating ANSI/ISO C aliasing rules, you should be using an union. ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/11066] error in the optimization of packed structures 2003-06-02 17:44 [Bug optimization/11066] New: error in the optimization of packed structures jourgun@club-internet.fr 2003-06-02 17:58 ` [Bug optimization/11066] " pinskia@physics.uc.edu @ 2005-06-05 8:24 ` pinskia at gcc dot gnu dot org 2005-06-05 8:24 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-06-05 8:24 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-06-05 08:24 ------- Mark as a dup of bug 21920. *** This bug has been marked as a duplicate of 21920 *** -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |DUPLICATE http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11066 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/11066] error in the optimization of packed structures 2003-06-02 17:44 [Bug optimization/11066] New: error in the optimization of packed structures jourgun@club-internet.fr 2003-06-02 17:58 ` [Bug optimization/11066] " pinskia@physics.uc.edu 2005-06-05 8:24 ` [Bug rtl-optimization/11066] " pinskia at gcc dot gnu dot org @ 2005-06-05 8:24 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-06-05 8:24 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-06-05 08:23 ------- Reopening to ... -- What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |UNCONFIRMED Resolution|INVALID | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11066 ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2005-06-05 8:24 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2003-06-02 17:44 [Bug optimization/11066] New: error in the optimization of packed structures jourgun@club-internet.fr 2003-06-02 17:58 ` [Bug optimization/11066] " pinskia@physics.uc.edu 2005-06-05 8:24 ` [Bug rtl-optimization/11066] " pinskia at gcc dot gnu dot org 2005-06-05 8:24 ` pinskia at gcc dot gnu dot org
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