GNU C version 3.4 20031012 (experimental) (alphaev68-unknown-linux-gnu) falk@juist:/tmp% cat min2.c int outbuf[100]; int outcnt; int bi_buf; void send_bits(void) { bi_buf = 0; outbuf[outcnt++] = 8; outbuf[outcnt++] = 8; if (outcnt) bi_buf = 1; } falk@juist:/tmp% gcc -O2 -c -fno-expensive-optimizations -fno-rerun-loop-opt min2.c min2.c: In function `send_bits': min2.c:11: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. Also happens on tree-ssa.
I can confirm this on the mainline (20031017) on powerpc-apple-darwin: Program received signal EXC_BAD_ACCESS, Could not access memory. 0x000af810 in init_alias_analysis () at /Volumes/UFS_Partition/pinskia/src/fsf/gcc-clean/ src/gcc/alias.c:2842 2842 else if (REG_N_SETS (regno) == 1 (gdb) bt #0 0x000af810 in init_alias_analysis () at /Volumes/UFS_Partition/pinskia/src/fsf/gcc- clean/src/gcc/alias.c:2842 #1 0x000eb840 in bypass_jumps (file=0x0) at /Volumes/UFS_Partition/pinskia/src/fsf/ gcc-clean/src/gcc/gcse.c:7970 #2 0x0009ee78 in rest_of_compilation (decl=0x0) at /Volumes/UFS_Partition/pinskia/ src/fsf/gcc-clean/src/gcc/toplev.c:2560 #3 0x001403b4 in tree_rest_of_compilation (fndecl=0x0, nested_p=false) at /Volumes/ UFS_Partition/pinskia/src/fsf/gcc-clean/src/gcc/tree-optimize.c:168 #4 0x00018a98 in c_expand_body_1 (fndecl=0x4045f818, nested_p=0) at /Volumes/ UFS_Partition/pinskia/src/fsf/gcc-clean/src/gcc/c-decl.c:6157 #5 0x0013a22c in cgraph_expand_function (node=0x40bd3ee0) at /Volumes/ UFS_Partition/pinskia/src/fsf/gcc-clean/src/gcc/cgraphunit.c:495 #6 0x0013a990 in cgraph_optimize () at /Volumes/UFS_Partition/pinskia/src/fsf/gcc- clean/src/gcc/cgraphunit.c:1273 #7 0x00049678 in c_objc_common_finish_file () at /Volumes/UFS_Partition/pinskia/src/ fsf/gcc-clean/src/gcc/c-objc-common.c:244 #8 0x0009d2b0 in toplev_main (argc=1078325600, argv=0x3e73e8) at /Volumes/ UFS_Partition/pinskia/src/fsf/gcc-clean/src/gcc/toplev.c:1821 #9 0x0000271c in _start (argc=17, argv=0xbffffb7c, envp=0xbffffbc4) at /SourceCache/ Csu/Csu-46/crt.c:267 #10 0x00002590 in start ()
*** Bug 13229 has been marked as a duplicate of this bug. ***
Patch here: <http://gcc.gnu.org/ml/gcc-patches/2003-12/msg00001.html>.
Subject: Bug 12628 CVSROOT: /cvs/gcc Module name: gcc Changes by: sayle@gcc.gnu.org 2003-12-01 21:16:59 Modified files: gcc : ChangeLog toplev.c regclass.c gcc/testsuite : ChangeLog Added files: gcc/testsuite/gcc.dg: 20031201-1.c Log message: PR optimization/12628 * toplev.c (rest_of_handle_jump_bypass): Call reg_scan. * regclass.c (reg_scan): Include allocate_reg_info time in TV_REG_SCAN. Minor clean-ups. (reg_scan_update): Minor clean-ups. * gcc.dg/20031201-1.c: New test case. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.1882&r2=2.1883 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/toplev.c.diff?cvsroot=gcc&r1=1.847&r2=1.848 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/regclass.c.diff?cvsroot=gcc&r1=1.179&r2=1.180 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.3215&r2=1.3216 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/20031201-1.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
Fixed for 3.4.