middle-end/3973: GCC fails to bootstrap with 80+160MB memory / optimization

[pfeifer@dbai.tuwien.ac dot@(Gerald Pfeifer)]

>Number:         3973
>Category:       middle-end
>Synopsis:       GCC fails to bootstrap with 80+160MB memory / optimization
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Aug 09 07:16:02 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     
>Release:        3.1 20010808 (experimental)
>Organization:
>Environment:
System: SunOS hostname 5.6 Generic_105181-28 sun4m sparc sun4m
Architecture: sun4

host: sparc-sun-solaris2.6
build: sparc-sun-solaris2.6
target: sparc-sun-solaris2.6
configured with: /sw/test/gcc/cvs/configure --prefix=/sw/test/gcc/SunOS --enable-languages=c,c++,objc,java
>Description:
Bootstrap on a sparc-sun-solaris2.6 box with 80MB of main memory
plus 160MB of swap fails with "out of memory":

stage2/xgcc -Bstage2/ -B/sw/test/gcc/SunOS/sparc-sun-solaris2.6/bin/ -c
-DIN_GCC    -g -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes   -DHAVE_CONFIG_H    -I. -Ijava -I/sw/test/gcc/cvs/gcc
-I/sw/test/gcc/cvs/gcc/java -I/sw/test/gcc/cvs/gcc/config
-I/sw/test/gcc/cvs/gcc/../include /sw/test/gcc/cvs/gcc/java/parse.c
-o java/parse.o
cc1: Cannot allocate 8744016 bytes after allocating 27115520 bytes
gmake[2]: *** [java/parse.o] Error 1
gmake[2]: Leaving directory `/tmp/OBJ-0808-0716/gcc'
gmake[1]: *** [stage3_build] Error 2
gmake[1]: Leaving directory `/tmp/OBJ-0808-0716/gcc'
gmake: *** [bootstrap-lean] Error 2

This is a regression from GCC 2.95.x and even GCC 3.0. Probably memory
leaks and inefficient/too expensive optimizations.

>How-To-Repeat:
	mkdir objdir ; cd objdir
	$GCC_SOURCE/configure --enable-languages=c,c++,objc,java
	make bootstrap
>Fix:
	
>Release-Note:
>Audit-Trail:
>Unformatted: