------- Comment #22 from hjl dot tools at gmail dot com 2008-09-03 16:05 ------- (In reply to comment #7) > Created an attachment (id=16155) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16155&action=view) [edit] > Test case from 2006.434.zeusmp > > Though fail to extract a smaller case, hopeful it helpful. > > Compile with gfortran -c -O2 -DSPEC_CPU_LP64 tranx1.f -S -fdump-rtl-all -g. > Miscompile in revision 139590. > > In IRA dump file, I believe following suspicious RTL is the cause of segfault: > (insn 886 885 893 35 tranx1.f:570 (set (reg:DI 0 ax [orig:123 D.3215 ] [123]) > (mem/c:DI (plus:DI (reg/f:DI 7 sp) > (const_int -104 [0xffffffffffffff98])) [68 D.3215+0 S8 A64])) > 89 {*movdi_1_rex64} (nil)) > > (insn 893 886 896 35 tranx1.f:570 (set (mem/c:DI (plus:DI (reg/f:DI 7 sp) > (const_int -104 [0xffffffffffffff98])) [68 ivtmp.160+0 S8 > A64]) > (reg/f:DI 3 bx [orig:159 ivtmp.160 ] [159])) 89 {*movdi_1_rex64} > (nil)) > D.3215 and ivtmp.160 shares the spill space (%rsp-104), where as D.3215 and > ivtmp.160 has overlapped liverange. >
It is fixed by Richard's use DF patch: http://gcc.gnu.org/ml/gcc/2008-09/msg00015.html -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37243
