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* [Bug tree-optimization/56161] New: label: jmp label bug in 4.8.0-0.7 @ 2013-01-31 11:14 hvtaifwkbgefbaei at gmail dot com 2013-01-31 11:46 ` [Bug tree-optimization/56161] " jakub at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: hvtaifwkbgefbaei at gmail dot com @ 2013-01-31 11:14 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56161 Bug #: 56161 Summary: label: jmp label bug in 4.8.0-0.7 Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: major Priority: P3 Component: tree-optimization AssignedTo: unassigned@gcc.gnu.org ReportedBy: hvtaifwkbgefbaei@gmail.com Created attachment 29314 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29314 dcraw adobe_coeff.c bug dcraw function adobe_coeff function with -O1 or higher: movw %ax, black(%rip) # D.2960, black .L7: movslq %ebx, %rax # i, i leaq (%rax,%rax,4), %rax #, tmp119 movzwl table.2869+10(,%rax,8), %eax # table[i_40].maximum, D.2960 testw %ax, %ax # D.2960 je .L8 #, movw %ax, maximum(%rip) # D.2960, maximum .L8: movslq %ebx, %rbx # i, i leaq (%rbx,%rbx,4), %rax #, tmp126 cmpw $0, table.2869+12(,%rax,8) #, table[i_40].trans je .L5 #, .L10: jmp .L10 # .L6: addl $1, %ebx #, i addq $40, %rbp #, ivtmp.38 cmpl $5, %ebx #, i jne .L11 #, .L5: addq $152, %rsp #, .cfi_def_cfa_offset 40 popq %rbx # here, jmp .L10 is what I do not like very much. with -fno-tree-dce this code generation bug does not happen. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/56161] label: jmp label bug in 4.8.0-0.7 2013-01-31 11:14 [Bug tree-optimization/56161] New: label: jmp label bug in 4.8.0-0.7 hvtaifwkbgefbaei at gmail dot com @ 2013-01-31 11:46 ` jakub at gcc dot gnu.org 2013-01-31 12:03 ` jakub at gcc dot gnu.org 2013-01-31 12:14 ` hvtaifwkbgefbaei at gmail dot com 2 siblings, 0 replies; 4+ messages in thread From: jakub at gcc dot gnu.org @ 2013-01-31 11:46 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56161 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |jakub at gcc dot gnu.org Resolution| |INVALID --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-01-31 11:45:53 UTC --- double cam_xyz[4][3]; ... for (j=0; j < 12; j++) cam_xyz[0][j] = table[i].trans[j] / 10000.0; When using cam_xyz[0][j], this is first converted into a pointer to array of 3 doubles, so cam_xyz[0][3] store (up to cam_xyz[0][11] store) all invoke undefined behavior. You just can't initialize a two dimensional array this way. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/56161] label: jmp label bug in 4.8.0-0.7 2013-01-31 11:14 [Bug tree-optimization/56161] New: label: jmp label bug in 4.8.0-0.7 hvtaifwkbgefbaei at gmail dot com 2013-01-31 11:46 ` [Bug tree-optimization/56161] " jakub at gcc dot gnu.org @ 2013-01-31 12:03 ` jakub at gcc dot gnu.org 2013-01-31 12:14 ` hvtaifwkbgefbaei at gmail dot com 2 siblings, 0 replies; 4+ messages in thread From: jakub at gcc dot gnu.org @ 2013-01-31 12:03 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56161 --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-01-31 12:02:51 UTC --- Using: double *cam_xyzp = (double *) &cam_xyz[0][0]; before the loop and using cam_xyzp[j] instead of cam_xyz[0][j] or using cam_xyz[j/3][j%3] or making cam_xyz one dimensional instead of two dimensional should fix this. Dup of PR54136 . ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/56161] label: jmp label bug in 4.8.0-0.7 2013-01-31 11:14 [Bug tree-optimization/56161] New: label: jmp label bug in 4.8.0-0.7 hvtaifwkbgefbaei at gmail dot com 2013-01-31 11:46 ` [Bug tree-optimization/56161] " jakub at gcc dot gnu.org 2013-01-31 12:03 ` jakub at gcc dot gnu.org @ 2013-01-31 12:14 ` hvtaifwkbgefbaei at gmail dot com 2 siblings, 0 replies; 4+ messages in thread From: hvtaifwkbgefbaei at gmail dot com @ 2013-01-31 12:14 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56161 --- Comment #3 from Sami Farin <hvtaifwkbgefbaei at gmail dot com> 2013-01-31 12:13:46 UTC --- Yes that array access was evil, but I didn't know this kind of things can happen :) Hmm seems Venkataramanan forgot to notify dcraw maintainer.. I'll do it now. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-01-31 12:14 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-01-31 11:14 [Bug tree-optimization/56161] New: label: jmp label bug in 4.8.0-0.7 hvtaifwkbgefbaei at gmail dot com 2013-01-31 11:46 ` [Bug tree-optimization/56161] " jakub at gcc dot gnu.org 2013-01-31 12:03 ` jakub at gcc dot gnu.org 2013-01-31 12:14 ` hvtaifwkbgefbaei at gmail dot com
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