Florent Defay <spira.inhabitant@xxxxxxxxx> writes: > After debugging with GDB, I found out that equiv_constant is called > with a null rtx as argument: > > Program received signal SIGSEGV, Segmentation fault. > equiv_constant (x=0x0) at ../../gcc-4.3.3/gcc/cse.c:3603 > 3603 if (REG_P (x) > (gdb) bt > #0 equiv_constant (x=0x0) at ../../gcc-4.3.3/gcc/cse.c:3603 > #1 0x0836bf37 in fold_rtx (x=0xb7c35c30, insn=0xb7c3baa0) at > ../../gcc-4.3.3/gcc/cse.c:3056 > #2 0x0836c1b5 in fold_rtx (x=0xb7c36de0, insn=0xb7c3baa0) at > ../../gcc-4.3.3/gcc/cse.c:3055 This strongly suggests that the insns has a NULL where it is not permitted. In any case you need to see what the values are in the code--e.g., what is being passed in the recursive call to fold_rtx, and what is being returned. Try dumping the RTL in the debugger to see if you can spot the issue. Take a look at gcc/gdbinit.in for some helpful gdb commands. Ian
