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built from today's CVS: gcc -v Using built-in specs. Configured with: ../gcc/configure --enable-languages=c,c++ --prefix=/usr --exec-prefix=/usr Thread model: single gcc version 3.2 20020619 (experimental) occurs with both native i686-pc-linux-gnu and cross compiler for target sh-elf. Release: CVS 20062002 mainline Environment: i686-pc-linux-gnu How-To-Repeat: g++ -O2 -c broken.cc
Fix: http://gcc.gnu.org/ml/gcc-patches/2003-03/msg02071.html
From: Reichelt <reichelt@igpm.rwth-aachen.de> To: gcc-gnats@gcc.gnu.org, brd@paradise.net.nz, gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org Cc: Subject: Re: c++/7086: g++ -O2 locks up Date: Wed, 26 Jun 2002 16:23:26 +0200 Hi, the compiler does not actually hang up, it just takes *much* longer (almost 50 times): compile time with 3.1: 3.6s compile time with trunk: 169s using a 600 MHz Pentium III (i686-pc-linux-gnu). Greetings, Volker Reichelt http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7086
State-Changed-From-To: open->analyzed State-Changed-Why: yes, this is a pretty severe time regression
From: Daniel Jacobowitz <drow@mvista.com> To: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org, brd@paradise.net.nz Cc: Subject: Re: c++/7086: [3.3/3.4 regression] compile time regression Date: Mon, 10 Mar 2003 21:32:25 -0500 Just FYI, I tried this with -O2 on: g++ (GCC) 3.3 20030129 (prerelease) The -ftime-report output was: Execution times (seconds) garbage collection : 1.56 ( 2%) usr 0.03 ( 3%) sys 3.00 ( 3%) wall cfg construction : 0.33 ( 0%) usr 0.02 ( 2%) sys 0.00 ( 0%) wall cfg cleanup : 1.38 ( 1%) usr 0.00 ( 0%) sys 1.00 ( 1%) wall trivially dead code : 0.30 ( 0%) usr 0.00 ( 0%) sys 1.00 ( 1%) wall life analysis : 0.33 ( 0%) usr 0.05 ( 5%) sys 0.00 ( 0%) wall life info update : 0.13 ( 0%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall preprocessing : 0.13 ( 0%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall lexical analysis : 0.10 ( 0%) usr 0.05 ( 5%) sys 0.00 ( 0%) wall parser : 0.95 ( 1%) usr 0.07 ( 7%) sys 1.00 ( 1%) wall expand : 85.42 (88%) usr 0.24 (25%) sys 86.00 (88%) wall varconst : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall integration : 0.11 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall jump : 0.92 ( 1%) usr 0.10 (10%) sys 1.00 ( 1%) wall CSE : 0.93 ( 1%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall global CSE : 0.73 ( 1%) usr 0.05 ( 5%) sys 1.00 ( 1%) wall loop analysis : 0.86 ( 1%) usr 0.23 (24%) sys 2.00 ( 2%) wall CSE 2 : 0.33 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall branch prediction : 0.19 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall flow analysis : 0.06 ( 0%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall combiner : 0.13 ( 0%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall if-conversion : 0.03 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall regmove : 0.11 ( 0%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall mode switching : 0.04 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall local alloc : 0.23 ( 0%) usr 0.03 ( 3%) sys 0.00 ( 0%) wall global alloc : 0.40 ( 0%) usr 0.00 ( 0%) sys 1.00 ( 1%) wall reload CSE regs : 0.30 ( 0%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall flow 2 : 0.07 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall peephole 2 : 0.04 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall rename registers : 0.10 ( 0%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall scheduling 2 : 0.19 ( 0%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall shorten branches : 0.05 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall final : 0.06 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall rest of compilation : 0.55 ( 1%) usr 0.00 ( 0%) sys 1.00 ( 1%) wall TOTAL : 97.10 0.96 98.00 I couldn't try the testcase on HEAD because it includes preprocessed output from the STL; the new parser rejects lots of it, for already well-discussed reasons. -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer
From: Steven Bosscher <s.bosscher@student.tudelft.nl> To: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org, brd@paradise.net.nz Cc: Subject: Re: c++/7086: [3.3/3.4 regression] compile time regression Date: Wed, 12 Mar 2003 11:52:07 +0100 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7086 You don't need -O2 to get this, just -O is enough.
From: mmitchel@gcc.gnu.org To: gcc-gnats@gcc.gnu.org Cc: Subject: c++/7086 Date: 24 Mar 2003 07:44:50 -0000 CVSROOT: /cvs/gcc Module name: gcc Branch: gcc-3_3-branch Changes by: mmitchel@gcc.gnu.org 2003-03-24 07:44:49 Modified files: gcc : ChangeLog c-typeck.c cfglayout.c expr.c function.c rtl.h stmt.c tree.h gcc/ada : ChangeLog utils2.c gcc/cp : ChangeLog semantics.c typeck.c gcc/f : ChangeLog com.c Log message: PR c++/7086 * c-typeck.c (c_mark_addressable): Adjust calls to put_var_into_stack. * expr.c (expand_expr): Likewise. * function.c (put_var_into_stack): Add rescan parameter. Do not call fixup_var_refs when rescan is false. (gen_mem_addressof): Likewise. (assign_parms): Adjust calls to put_var_into_stack. (setjmp_protect): Likewise. (setjmp_protect_args): Likewise. * rtl.h (gen_mem_addressof): Change prototype. * stmt.c (expand_decl): Adjust calls to put_var_into_stack. * tree.h (put_var_into_stack): Change prototype. PR c++/7086 * utils2.c: Adjust calls to put_var_into_stack. PR c++/7086 * semantics.c (genrtl_named_return_value): Adjust calls to put_var_into_stack. * typeck.c (cxx_mark_addressable): Likewise. PR c++/7086 * com.c (ffecom_sym_transform_): Adjust calls to put_var_into_stack. (ffe_mark_addressable): Likewise. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.16114.2.350&r2=1.16114.2.351 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-typeck.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.213.2.4&r2=1.213.2.5 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cfglayout.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.23&r2=1.23.2.1 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.498.2.10&r2=1.498.2.11 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/function.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.389.2.6&r2=1.389.2.7 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/rtl.h.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.375.2.2&r2=1.375.2.3 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/stmt.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.276.2.7&r2=1.276.2.8 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.h.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.367.2.2&r2=1.367.2.3 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ada/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.270.2.10&r2=1.270.2.11 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ada/utils2.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.11&r2=1.11.4.1 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.3076.2.93&r2=1.3076.2.94 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/semantics.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.282.4.1&r2=1.282.4.2 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/typeck.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.436.2.4&r2=1.436.2.5 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/f/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.503.2.15&r2=1.503.2.16 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/f/com.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.182.4.1&r2=1.182.4.2
From: mmitchel@gcc.gnu.org To: gcc-gnats@gcc.gnu.org Cc: Subject: c++/7086 Date: 24 Mar 2003 08:31:36 -0000 CVSROOT: /cvs/gcc Module name: gcc Changes by: mmitchel@gcc.gnu.org 2003-03-24 08:31:36 Modified files: gcc : ChangeLog c-typeck.c expr.c function.c rtl.h stmt.c tree.h gcc/ada : ChangeLog utils2.c gcc/cp : ChangeLog typeck.c gcc/f : ChangeLog com.c Log message: PR c++/7086 * c-typeck.c (c_mark_addressable): Adjust calls to put_var_into_stack. * expr.c (expand_expr): Likewise. * function.c (put_var_into_stack): Add rescan parameter. Do not call fixup_var_refs when rescan is false. (gen_mem_addressof): Likewise. (assign_parms): Adjust calls to put_var_into_stack. (setjmp_protect): Likewise. (setjmp_protect_args): Likewise. * rtl.h (gen_mem_addressof): Change prototype. * stmt.c (expand_decl): Adjust calls to put_var_into_stack. * tree.h (put_var_into_stack): Change prototype. PR c++/7086 * utils2.c: Adjust calls to put_var_into_stack. PR c++/7086 * semantics.c (genrtl_named_return_value): Adjust calls to put_var_into_stack. * typeck.c (cxx_mark_addressable): Likewise. PR c++/7086 * com.c (ffecom_sym_transform_): Adjust calls to put_var_into_stack. (ffe_mark_addressable): Likewise. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=1.17198&r2=1.17199 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-typeck.c.diff?cvsroot=gcc&r1=1.226&r2=1.227 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&r1=1.515&r2=1.516 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/function.c.diff?cvsroot=gcc&r1=1.410&r2=1.411 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/rtl.h.diff?cvsroot=gcc&r1=1.388&r2=1.389 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/stmt.c.diff?cvsroot=gcc&r1=1.296&r2=1.297 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.h.diff?cvsroot=gcc&r1=1.385&r2=1.386 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ada/ChangeLog.diff?cvsroot=gcc&r1=1.297&r2=1.298 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ada/utils2.c.diff?cvsroot=gcc&r1=1.13&r2=1.14 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.3291&r2=1.3292 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/typeck.c.diff?cvsroot=gcc&r1=1.453&r2=1.454 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/f/ChangeLog.diff?cvsroot=gcc&r1=1.531&r2=1.532 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/f/com.c.diff?cvsroot=gcc&r1=1.186&r2=1.187
State-Changed-From-To: analyzed->closed State-Changed-Why: Fixed in GCC 3.3, GCC 3.4.