http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50827
--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> 2011-10-23 06:59:24 UTC --- Created attachment 25579 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25579 smaller testcase This testcase needs a bit different flags: $ gcc -O2 -g -funroll-loops testcase2.c testcase2.c: In function 'f': testcase2.c:13:1: internal compiler error: RTL check: expected elt 0 type 'e' or 'u', have '0' (rtx entry_value) in loc_cmp, at var-tracking.c:3011 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. (gdb) bt #0 rtl_check_failed_type2 (r=0x7ffff570a1b0, n=0, c1=101, c2=117, file=0x12af360 "/mnt/svn/gcc-trunk/gcc/var-tracking.c", line=3011, func=0x12b0200 "loc_cmp") at /mnt/svn/gcc-trunk/gcc/rtl.c:760 #1 0x0000000000bc4347 in loc_cmp (x=Unhandled dwarf expression opcode 0xf3 ) at /mnt/svn/gcc-trunk/gcc/var-tracking.c:3011 #2 0x0000000000bc4461 in loc_cmp (x=Unhandled dwarf expression opcode 0xf3 ) at /mnt/svn/gcc-trunk/gcc/var-tracking.c:3074 #3 0x0000000000bc4e5e in onepart_variable_different_p (var1=0x7ffff570a1b0, var2=0x0) at /mnt/svn/gcc-trunk/gcc/var-tracking.c:4463 #4 0x0000000000bd957a in variable_merge_over_cur (dst=Unhandled dwarf expression opcode 0xf3 ) at /mnt/svn/gcc-trunk/gcc/var-tracking.c:3706 #5 dataflow_set_merge (dst=Unhandled dwarf expression opcode 0xf3 ) at /mnt/svn/gcc-trunk/gcc/var-tracking.c:3784 #6 0x0000000000bd9fcf in vt_find_locations () at /mnt/svn/gcc-trunk/gcc/var-tracking.c:6567 #7 0x0000000000bde265 in variable_tracking_main_1 () at /mnt/svn/gcc-trunk/gcc/var-tracking.c:9608 #8 variable_tracking_main () at /mnt/svn/gcc-trunk/gcc/var-tracking.c:9653 #9 0x00000000008e5d68 in execute_one_pass (pass=0x17a1ca0) at /mnt/svn/gcc-trunk/gcc/passes.c:2064 #10 0x00000000008e60d5 in execute_pass_list (pass=0x17a1ca0) at /mnt/svn/gcc-trunk/gcc/passes.c:2119 #11 0x00000000008e60e7 in execute_pass_list (pass=0x179e840) at /mnt/svn/gcc-trunk/gcc/passes.c:2120 #12 0x00000000008e60e7 in execute_pass_list (pass=0x179e8a0) at /mnt/svn/gcc-trunk/gcc/passes.c:2120 #13 0x0000000000a3df6e in tree_rest_of_compilation (fndecl=0x7ffff568a100) at /mnt/svn/gcc-trunk/gcc/tree-optimize.c:420 #14 0x000000000069475a in cgraph_expand_function (node=0x7ffff55887e0) at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:1819 #15 0x00000000006966ac in cgraph_expand_all_functions () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:1886 #16 cgraph_optimize () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:2197 #17 0x0000000000696baa in cgraph_finalize_compilation_unit () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:1327 #18 0x000000000057939b in c_write_global_declarations () at /mnt/svn/gcc-trunk/gcc/c-decl.c:9940 #19 0x00000000009dbb84 in compile_file (argc=15, argv=0x7fffffffdad8) at /mnt/svn/gcc-trunk/gcc/toplev.c:581 #20 do_compile (argc=15, argv=0x7fffffffdad8) at /mnt/svn/gcc-trunk/gcc/toplev.c:1930 #21 toplev_main (argc=15, argv=0x7fffffffdad8) at /mnt/svn/gcc-trunk/gcc/toplev.c:2006 #22 0x00007ffff6178d2d in __libc_start_main () from /lib64/libc.so.6 #23 0x000000000055cf19 in _start ()
