http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56349
Bug #: 56349 Summary: ICE in create_preheader at cfgloopmanip.c:1525 Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassig...@gcc.gnu.org ReportedBy: antoine.balest...@gmail.com Hello ! Using GCC 4.8.0 as of 20130215 : $ cat preh.c int a, b; short c; void f(void) { int *k = a = 0; for(; a < 2; a++); if(!!(b |= a < 3) - 1) { if(0) for (;; a++) { for (; c; *k = 0); lbl1: ; } for(; *k; k++) { c = b ? : a; if (c) lbl2: b = 0; } goto lbl1; } for(;; b++) { if(b) goto lbl2; k = &b; } } $ xgcc -O2 -ftree-partial-pre -w preh.c preh.c: In function âfâ: preh.c:38:1: internal compiler error: Segmentation fault } ^ 0x8dba2f crash_signal ../../srcdir/gcc/toplev.c:332 0x5ffcdb create_preheader(loop*, int) ../../srcdir/gcc/cfgloopmanip.c:1525 0x600069 create_preheaders(int) ../../srcdir/gcc/cfgloopmanip.c:1577 0x7de31e apply_loop_flags ../../srcdir/gcc/loop-init.c:61 0x7de3df loop_optimizer_init(unsigned int) ../../srcdir/gcc/loop-init.c:108 0x7de4ba rtl_loop_init ../../srcdir/gcc/loop-init.c:329 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions.