[Bug tree-optimization/22216] New: [4.1 regression] ICE during GC

["schwab at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

Broken by patch from PR21959. 
 
$ stage1/xgcc -Bstage1/ -B/usr/local/ia64-suse-linux/bin/ -c -g -O2      
-gnatpg -gnata -I- -I. -Iada -I../../gcc/ada ../../gcc/ada/par.adb -o 
ada/par.o -v 
Reading specs from stage1/specs 
Target: ia64-suse-linux 
Configured with: ../configure --host=ia64-suse-linux --enable-shared 
--enable-threads --enable-__cxa_atexit --with-system-zlib 
--with-system-libunwind 
Thread model: posix 
gcc version 4.1.0 20050628 (experimental) 
 stage1/gnat1 -I- -I. -Iada -I../../gcc/ada -quiet -dumpbase par.adb -O2 -g 
-gnatpg -gnata -gnatO ada/par.o ../../gcc/ada/par.adb -o /tmp/cccUDAec.s 
+===========================GNAT BUG DETECTED==============================+ 
| 4.1.0 20050628 (experimental) (ia64-suse-linux-gnu) Segmentation fault   | 
| Error detected at par.adb:1442:14                                        | 
 
Starting program: /tmp/cvs/gcc-20050628/Build/gcc/stage1/gnat1 -I- -I. -Iada 
-I../../gcc/ada -quiet -dumpbase par.adb -O2 -g -gnatpg -gnata -gnatO 
ada/par.o ../../gcc/ada/par.adb 
 
Program received signal SIGSEGV, Segmentation fault. 
gt_ggc_mx_basic_block_def (x_p=0x0) at gtype-desc.c:402 
402	{ 
(gdb) bt 
#0  gt_ggc_mx_basic_block_def (x_p=0x0) at gtype-desc.c:402 
#1  0x400000000096b120 in gt_ggc_mx_rtx_def (x_p=0x20000000032d2670) 
    at gtype-desc.c:846 
#2  0x400000000096a090 in gt_ggc_mx_rtx_def (x_p=0x20000000032d2670) 
    at gtype-desc.c:846 
#3  0x400000000096e820 in gt_ggc_mx_function (x_p=0x200000000072d600) 
    at gtype-desc.c:565 
#4  0x4000000000041910 in gt_ggc_mx_lang_tree_node (x_p=0x20000000004509c0) 
    at gtype-ada.h:25 
#5  0x4000000000041090 in gt_ggc_mx_lang_tree_node (x_p=0x200000000030ce70) 
    at gtype-ada.h:25 
#6  0x4000000000041070 in gt_ggc_mx_lang_tree_node (x_p=0x200000000030ce00) 
    at gtype-ada.h:25 
#7  0x4000000000041370 in gt_ggc_mx_lang_tree_node (x_p=0x20000000003def20) 
    at gtype-ada.h:25 
#8  0x40000000000413d0 in gt_ggc_mx_lang_tree_node (x_p=0x20000000004768a0) 
    at gtype-ada.h:25 
#9  0x40000000000413d0 in gt_ggc_mx_lang_tree_node (x_p=0x2000000001de12b0) 
    at gtype-ada.h:25 
#10 0x40000000000413d0 in gt_ggc_mx_lang_tree_node (x_p=0x2000000001e7d6c0) 
    at gtype-ada.h:25 
#11 0x4000000000966820 in gt_ggc_mx_reg_attrs (x_p=0x20000000029656d0) 
    at gtype-desc.c:438 
#12 0x4000000000969e20 in gt_ggc_mx_rtx_def (x_p=0x0) at gtype-desc.c:846 
#13 0x4000000000952a00 in ggc_mark_roots () at ggc-common.c:118 
#14 0x4000000000b4f840 in ggc_collect () at ggc-page.c:1972 
#15 0x4000000000b58b60 in rest_of_compilation () at passes.c:423 
#16 0x40000000005d04f0 in execute_one_pass (pass=0x600000000000e840) 
    at tree-optimize.c:665 
#17 0x40000000005d07e0 in execute_pass_list (pass=0x600000000000e840) 
    at tree-optimize.c:748 
#18 0x40000000005d0e00 in tree_rest_of_compilation (fndecl=0x20000000004509c0) 
    at tree-optimize.c:914 
#19 0x4000000000039410 in gnat_expand_body (gnu_decl=0x20000000004509c0) 
    at misc.c:635 
#20 0x4000000000bd8030 in cgraph_expand_function (node=0x2000000001a4f330) 
    at cgraphunit.c:1033 
#21 0x4000000000bdc080 in cgraph_optimize () at cgraphunit.c:1099 
#22 0x400000000003a9c0 in gnat_parse_file (set_yydebug=11478448) at misc.c:245 
#23 0x4000000000af25b0 in toplev_main (argc=241376, argv=0x600000000003aef8) 
    at toplev.c:1930 
#24 0x40000000005bd430 in main (argc=241376, argv=0x600000000003aef8) 
    at main.c:35

-- 
           Summary: [4.1 regression] ICE during GC
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, build
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: schwab at suse dot de
                CC: dnovillo at gcc dot gnu dot org,gcc-bugs at gcc dot gnu
                    dot org
GCC target triplet: ia64-*-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22216