RE: optimization/6368: ia64 bad code for LAPACK with -O2 -funroll-all-loops

["Billinghurst, David \(CRTS\)" <David.Billinghurst@riotinto.com>]

The following reply was made to PR optimization/6368; it has been noted by GNATS.

From: "Billinghurst, David (CRTS)" <David.Billinghurst@riotinto.com>
To: <janis187@us.ibm.com>,
	<gcc-gnats@gcc.gnu.org>
Cc:  
Subject: RE: optimization/6368: ia64 bad code for LAPACK with -O2 -funroll-all-loops
Date: Fri, 19 Apr 2002 11:00:16 +1000

 Janis,
 
 I have attached one of tools for tracking down LAPACK errors.
 It is cruse, but it saves my time.
 
 You will need to adapt the makefile for the particular binary
 under test, but it is just cut and paste from the TESTING/*/Makefile
 
 The basic idea is to use a know good LAPACK library with each
 individual file from the bad LAPACK library.  Then by=20
 comparing the .out files, the bad routine(s) can be identified. =20
 
 make xeigtst-lapack-routines.txt
 for f in `cat xeigtst-lapack-routines.txt`
 do
   make F=3D${f} ssep-${f}.out
   rm xeigtsts-${f} core
 done
 
 
 ################### Makefile########################
 # LAPACK source tree
 SRC =3D /usr/local/imports/LAPACK
 
 # Bad LAPACK object tree
 L =3D /exd4/billingd/obj/LAPACK-gcc
 
 # Good LAPACK object tree
 L0 =3D /exd4/billingd/obj/LAPACK-gcc-O0
 
 vpath %.o $(L0)/TESTING/EIG:$(L0)/SRC
 vpath %.in .:$(SRC)/TESTING
 
 BLAS   =3D $(L0)/blas.a
 LAPACK =3D $(L0)/lapack.a
 TMGLIB =3D $(L0)/tmglib.a
 
 LIBS =3D $(TMGLIB) $(LAPACK) $(BLAS)
 
 # GCC object tree under test
 SS      =3D /exd4/billingd/obj/gcc
 
 
 # These options produce the failure
 FC      =3D $(SS)/gcc/g77 -B$(SS)/gcc/ -L$(SS)/mips-sgi-irix6.5/libf2c
 FFLAGS  =3D  -O3 -funroll-loops
 LD      =3D $(FC)
 LDFLAGS =3D -L$(SS)/mips-sgi-irix6.5/libf2c \
           -L$(SS)/mips-sgi-irix6.5/libf2c/.libs=20
 
 ENV =3D =
 LD_LIBRARYN32_PATH=3D$(SS)/mips-sgi-irix6.5/libf2c/.libs:$(SS)/gcc
 
 # Object files for xeigtst
 XOBJS =3D schkee.o sbdt01.o sbdt02.o sbdt03.o schkbb.o schkbd.o schkbk.o =
 \
         schkbl.o schkec.o schkgg.o schkgk.o schkgl.o schkhs.o schksb.o \
         schkst.o sckglm.o sckgqr.o sckgsv.o scklse.o sdrges.o sdrgev.o \
         sdrgsx.o sdrgvx.o sdrvbd.o sdrves.o sdrvev.o sdrvgg.o sdrvsg.o \
         sdrvst.o sdrvsx.o sdrvvx.o serrbd.o serrec.o serred.o serrgg.o \
         serrhs.o serrst.o sget02.o sget10.o sget22.o sget23.o sget24.o \
         sget31.o sget32.o sget33.o sget34.o sget35.o sget36.o sget37.o \
         sget38.o sget39.o sget51.o sget52.o sget53.o sget54.o sglmts.o \
         sgqrts.o sgrqts.o sgsvts.o shst01.o slarfy.o slarhs.o slatm4.o \
         slctes.o slctsx.o slsets.o sort01.o sort03.o ssbt21.o ssgt01.o \
         sslect.o sspt21.o sstt21.o sstt22.o ssyt21.o ssyt22.o slafts.o \
         slahd2.o slasum.o slatb9.o sstech.o sstect.o ssvdch.o ssvdct.o \
         ssxt1.o alahdg.o alasum.o alasvm.o alareq.o ilaenv.o xerbla.o \
         xlaenv.o chkxer.o
 
 xeigtsts: $(XOBJS)
 	$(LD) $(LDFLAGS) -o $@ $+ $(LIBS)
 
 ssep%.out: xeigtsts sep%.in
 	$(ENV) $(filter xeigtsts%, $+) < $(filter %.in, $+) > $@
 
 xeigtsts-$(F): $(F).o $(XOBJS)
 	$(LD) $(LDFLAGS) -o $@ $+ $(LIBS)
 
 ssep-$(F).out: xeigtsts-$(F) sep.in
 	$(ENV) $(filter xeigtsts%, $+) < $(filter %.in, $+) > $@
 
 ssg-$(F).out: xeigtsts-$(F) ssg.in
 	$(ENV) $(filter xeigtsts%, $+) < $(filter %.in, $+) > $@
 
 #----------------------------------------
 lapack-routines.txt:
 	(cd $(L)/SRC; ls ) | sed -e 's/\.o//' > $@
 
 xeigtst-nm.txt: $(L)/TESTING/xeigtsts
 	nm $+ > $@
 
 xeigtst-routines.txt: xeigtst-nm.txt=20
 	grep FUNC $+ | sed -e 's/|/ /g' \
 	|  gawk '{print $$8}' | sed -e 's/_$$//' | sort > $@
 
 xeigtst-lapack-routines.txt: lapack-routines.txt xeigtst-routines.txt
 	comm -12 $+ > $@
 
 %.o: %.f
 	$(FC) $(FFLAGS) -c -o $@ $+