From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28887 invoked by alias); 20 Mar 2007 15:31:54 -0000 Received: (qmail 28798 invoked by uid 48); 20 Mar 2007 15:31:36 -0000 Date: Tue, 20 Mar 2007 15:31:00 -0000 Message-ID: <20070320153136.28796.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/30562] [4.3 Regression] remove unused variable is removing a referenced variable (in STORED_SYMS or LOADED_SYMS) In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "pthaugen at us dot ibm dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2007-03/txt/msg01938.txt.bz2 ------- Comment #9 from pthaugen at us dot ibm dot com 2007-03-20 15:31 ------- Looks like I can reproduce with mainline using -O2 -ftree-loop-linear when building galgel benchmark from cpu2000. (My FORTRAN skills are lacking, so couldn't whittle down to a single testcase, but got close) 178.galgel/run> /home/pthaugen/install/gcc/trunk/bin/gfortran -c -m64 -ffixed-form -O2 -ftree-loop-linear modules.f90 178.galgel/run> /home/pthaugen/install/gcc/trunk/bin/gfortran -c -m64 -ffixed-form -O2 -ftree-loop-linear sysnsL.f90 sysnsL.f90: In function #sysnsl#: sysnsL.f90:6: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See for instructions. (gdb) run Starting program: /home/pthaugen/install/gcc/trunk/libexec/gcc/powerpc64-linux/4.3.0/f951 sysnsL.f90 -quiet -dumpbase sysnsL.f90 -m64 -auxbase sysnsL -O2 -version -ffixed-form -ftree-loop-linear -fintrinsic-modules-path /home/pthaugen/install/gcc/trunk/lib/gcc/powerpc64-linux/4.3.0/finclude -o sysnsL.s GNU F95 version 4.3.0 20070314 (experimental) (powerpc64-linux) compiled by GNU C version 4.1.0 (SUSE Linux). GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 Program received signal SIGSEGV, Segmentation fault. remove_referenced_var (var=) at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-dfa.c:771 771 ggc_free (*loc); (gdb) bt 5 #0 remove_referenced_var (var=) at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-dfa.c:771 #1 0x103d1238 in remove_unused_locals () at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-ssa-live.c:518 #2 0x1026f204 in execute_function_todo (data=) at /home/pthaugen/src/gcc/trunk/gcc/gcc/passes.c:865 #3 0x1026ee44 in do_per_function (callback=0x1026efe0 , data=0x21) at /home/pthaugen/src/gcc/trunk/gcc/gcc/passes.c:757 #4 0x1026ef4c in execute_todo (flags=33) at /home/pthaugen/src/gcc/trunk/gcc/gcc/passes.c:935 (More stack frames follow...) -- pthaugen at us dot ibm dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |pthaugen at us dot ibm dot | |com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30562