bin/147451: "gcc -g -O2 -march=nocona" loops compiling devel/qt4-script

[Peter Jeremy]

>Number:         147451
>Category:       bin
>Synopsis:       "gcc -g -O2 -march=nocona" loops compiling devel/qt4-script
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jun 03 21:10:02 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Peter Jeremy
>Release:        FreeBSD 8.0-STABLE amd64
>Organization:
n/a
>Environment:
System: FreeBSD server.vk2pj.dyndns.org 8.0-STABLE FreeBSD 8.0-STABLE #3: Mon Apr 5 10:18:04 EST 2010 root at server.vk2pj.dyndns.org:/var/obj/usr/src/sys/server amd64

GNU C++ version 4.2.1 20070719  [FreeBSD] (amd64-undermydesk-freebsd)
        compiled by GNU C version 4.2.1 20070719  [FreeBSD].

Also occurs on 8.1-PRERELEASE from early June.

>Description:
	The compilation of .../JavaScriptCore/interpreter/Interpreter.cpp
	in ports/devel/qt4-script loops, with cc1plus slowly eating memory
	until it hits ulimit or runs out of swap, when compiled with
	'-g -O2 -march=nocona'

	Removing either '-g' or '-march-nocona' causes the compilation to
	succeed normally in 30 seconds or less.  With both specified,
	I saw the cc1plus VSZ grow to over 1.5GB and use over 70 minutes
	of CPU before I gave up watching.

>How-To-Repeat:
	cd /usr/ports/devel/qt4-script
	make clean
	make configure
	cd WRKDIRPREFIX/usr/ports/devel/qt4-script/work/qt-everywhere-opensource-src-4.6.2/src/script
	c++ -c -O2 -g -march=nocona -pipe -fno-strict-aliasing -Wreturn-type -fno-strict-aliasing -O2 -fvisibility=hidden -fvisibility-inlines-hidden -fPIC -DQT_SHARED -DJSC=QTJSC -Djscyyparse=qtjscyyparse -Djscyylex=qtjscyylex -Djscyyerror=qtjscyyerror -DWTF=QTWTF -DQT_BUILD_SCRIPT_LIB -DQT_NO_USING_NAMESPACE -DQLALR_NO_QSCRIPTGRAMMAR_DEBUG_INFO -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT3_SUPPORT -DQT_MOC_COMPAT -DBUILDING_QT__=1 -DNDEBUG -DBUILDING_QT__ -DBUILDING_JavaScriptCore -DBUILDING_WTF -DWTF_USE_JAVASCRIPTCORE_BINDINGS=1 -DWTF_CHANGES=1 -DNDEBUG -DJS_EXPORT= -DJS_EXPORTDATA= -DQT_NO_DEBUG -DQT_CORE_LIB -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I/usr/local/share/qt4/mkspecs/freebsd-g++ -I. -I../../include/QtCore -I../../include -I../3rdparty/javascriptcore/JavaScriptCore -I../3rdparty/javascriptcore -I../3rdparty/javascriptcore/JavaScriptCore/assembler -I../3rdparty/javascriptcore/JavaScriptCore/bytecode -I../3rdparty/javascriptcore/JavaScriptCore/bytecompiler -I!
 ../3rdparty/javascriptcore/JavaScriptCore/debugger -I../3rdparty/javascriptcore/JavaScriptCore/interpreter -I../3rdparty/javascriptcore/JavaScriptCore/jit -I../3rdparty/javascriptcore/JavaScriptCore/parser -I../3rdparty/javascriptcore/JavaScriptCore/profiler -I../3rdparty/javascriptcore/JavaScriptCore/runtime -I../3rdparty/javascriptcore/JavaScriptCore/wrec -I../3rdparty/javascriptcore/JavaScriptCore/wtf -I../3rdparty/javascriptcore/JavaScriptCore/wtf/unicode -I../3rdparty/javascriptcore/JavaScriptCore/yarr -I../3rdparty/javascriptcore/JavaScriptCore/API -I../3rdparty/javascriptcore/JavaScriptCore/ForwardingHeaders -Igenerated -I../../include/QtScript -I.rcc/release-shared -I/usr/ports/work/usr/ports/devel/qt4-script/work/qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/WebKit/qt/Api -I../3rdparty/javascriptcore/JavaScriptCore/pcre -I/usr/ports/work/usr/ports/devel/qt4-script/work/qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/WebKitBuild/Relea!
 se/JavaScriptCore/tmp -I../3rdparty/javascriptcore/JavaScriptC!
 ore -I../3rdparty/javascriptcore/JavaScriptCore/parser -I../3rdparty/javascriptcore/JavaScriptCore/bytecompiler -I../3rdparty/javascriptcore/JavaScriptCore/debugger -I../3rdparty/javascriptcore/JavaScriptCore/runtime -I../3rdparty/javascriptcore/JavaScriptCore/wtf -I/usr/ports/work/usr/ports/devel/qt4-script/work/qt-everywhere-opensource-src-4.6.2/src/script/../3rdparty/javascriptcore/JavaScriptCore/unicode -I../3rdparty/javascriptcore/JavaScriptCore/interpreter -I../3rdparty/javascriptcore/JavaScriptCore/jit -I../3rdparty/javascriptcore/JavaScriptCore/profiler -I../3rdparty/javascriptcore/JavaScriptCore/wrec -I../3rdparty/javascriptcore/JavaScriptCore/API -I../3rdparty/javascriptcore/JavaScriptCore/bytecode -I../3rdparty/javascriptcore/JavaScriptCore/assembler -I../3rdparty/javascriptcore/JavaScriptCore/generated -I. -Iparser -I.moc/release-shared -I/usr/local/include -o obj/release/Interpreter.o ../3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.cpp

	[The above command line was extracted from the actual build log
	and run manually with different options to check the problem]
>Fix:
	Unclear
>Release-Note:
>Audit-Trail:
>Unformatted: