Created attachment 18153 [details]
test case

Created attachment 18154 [details]
patch to fix bug

patches should be sent to gcc-patches@gcc.gnu.org with a changelog entry
and a note how it was tested.

I did not run any test suite, nor prepared any test case suitable for inclusion in dejagnu suite.
I opened a bug hopping the information I gave would help resolve the issue faster.

The patch seems reasonable, but it exposes a latent bug in Nathan's mmultiple patch that was not tested because of this bug.

This patch should have been tested and posted to the GCC mailinglist referencing this PR.

The fix for this actually is more involved.  Nathan had a patch last October which exposed similar bootstrap problems.  He posted a revised patch

http://gcc.gnu.org/ml/gcc-patches/2008-11/msg01103.html

I'm not what the means are bump the priority on this as a significant regression in gcc4.4 as code that was building with gcc4.3 no longer builds because the size of the generated binaries is significantly larger without load/store multiple or out of line save/restore functions.

u-boot (an open source bootloader used on a large # of embedded PPC platforms no longer builds with gcc4.4)

UNDEF_SYM=`objdump -x board/freescale/mpc8536ds/libmpc8536ds.a lib_generic/libgeneric.a lib_generic/lzma/liblzma.a lib_generic/lzo/liblzo.a board/freescale/common/libfreescale.a cpu/mpc85xx/libmpc85xx.a lib_ppc/libppc.a fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a fs/jffs2/libjffs2.a fs/reiserfs/libreiserfs.a fs/ext2/libext2fs.a fs/yaffs2/libyaffs2.a fs/ubifs/libubifs.a net/libnet.a disk/libdisk.a drivers/bios_emulator/libatibiosemu.a drivers/block/libblock.a drivers/dma/libdma.a drivers/fpga/libfpga.a drivers/gpio/libgpio.a drivers/hwmon/libhwmon.a drivers/i2c/libi2c.a drivers/input/libinput.a drivers/misc/libmisc.a drivers/mmc/libmmc.a drivers/mtd/libmtd.a drivers/mtd/nand/libnand.a drivers/mtd/onenand/libonenand.a drivers/mtd/ubi/libubi.a drivers/mtd/spi/libspi_flash.a drivers/net/libnet.a drivers/net/phy/libphy.a drivers/net/sk98lin/libsk98lin.a drivers/pci/libpci.a drivers/pcmcia/libpcmcia.a drivers/power/libpower.a drivers/spi/libspi.a drivers/qe/qe.a cpu/mpc8xxx/ddr/libddr.a drivers/rtc/librtc.a drivers/serial/libserial.a drivers/twserial/libtws.a drivers/usb/gadget/libusb_gadget.a drivers/usb/host/libusb_host.a drivers/usb/musb/libusb_musb.a drivers/video/libvideo.a drivers/watchdog/libwatchdog.a common/libcommon.a libfdt/libfdt.a api/libapi.a post/libpost.a | sed  -n -e 's/.*\(__u_boot_cmd_.*\)/-u\1/p'|sort|uniq`; cd /root/u-boot && ld -Bstatic -T u-boot.lds  -n -Ttext 0xeff80000 $UNDEF_SYM cpu/mpc85xx/start.o cpu/mpc85xx/resetvec.o --start-group lib_generic/libgeneric.a lib_generic/lzma/liblzma.a lib_generic/lzo/liblzo.a board/freescale/common/libfreescale.a cpu/mpc85xx/libmpc85xx.a lib_ppc/libppc.a fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a fs/jffs2/libjffs2.a fs/reiserfs/libreiserfs.a fs/ext2/libext2fs.a fs/yaffs2/libyaffs2.a fs/ubifs/libubifs.a net/libnet.a disk/libdisk.a drivers/bios_emulator/libatibiosemu.a drivers/block/libblock.a drivers/dma/libdma.a drivers/fpga/libfpga.a drivers/gpio/libgpio.a drivers/hwmon/libhwmon.a drivers/i2c/libi2c.a drivers/input/libinput.a drivers/misc/libmisc.a drivers/mmc/libmmc.a drivers/mtd/libmtd.a drivers/mtd/nand/libnand.a drivers/mtd/onenand/libonenand.a drivers/mtd/ubi/libubi.a drivers/mtd/spi/libspi_flash.a drivers/net/libnet.a drivers/net/phy/libphy.a drivers/net/sk98lin/libsk98lin.a drivers/pci/libpci.a drivers/pcmcia/libpcmcia.a drivers/power/libpower.a drivers/spi/libspi.a drivers/qe/qe.a cpu/mpc8xxx/ddr/libddr.a drivers/rtc/librtc.a drivers/serial/libserial.a drivers/twserial/libtws.a drivers/usb/gadget/libusb_gadget.a drivers/usb/host/libusb_host.a drivers/usb/musb/libusb_musb.a drivers/video/libvideo.a drivers/watchdog/libwatchdog.a common/libcommon.a libfdt/libfdt.a api/libapi.a post/libpost.a board/freescale/mpc8536ds/libmpc8536ds.a --end-group -L /usr/lib/gcc/ppc64-redhat-linux/4.4.1 -lgcc -Map u-boot.map -o u-boot
ld: Warning: /usr/lib/gcc/ppc64-redhat-linux/4.4.1/libgcc.a(_lshrdi3.o) uses hard float, u-boot uses soft float
ld: Warning: /usr/lib/gcc/ppc64-redhat-linux/4.4.1/libgcc.a(_ashldi3.o) uses hard float, u-boot uses soft float
ld: Warning: /usr/lib/gcc/ppc64-redhat-linux/4.4.1/libgcc.a(_ashrdi3.o) uses hard float, u-boot uses soft float
ld: Warning: /usr/lib/gcc/ppc64-redhat-linux/4.4.1/libgcc.a(_udivdi3.o) uses hard float, u-boot uses soft float
ld: Warning: /usr/lib/gcc/ppc64-redhat-linux/4.4.1/libgcc.a(_umoddi3.o) uses hard float, u-boot uses soft float
ld: section .bootpg loaded at [00000000effff000,00000000effff1cb] overlaps section .data loaded at [00000000efffb040,00000000effff4f7]
ld: section .resetvec loaded at [00000000effffffc,00000000efffffff] overlaps section .data.rel.local loaded at [00000000effffef8,00000000f000122b]
ld: u-boot: section .bootpg vma 0xeffff000 overlaps previous sections
ld: u-boot: section .data.rel.ro.local vma 0xeffff4f8 overlaps previous sections
ld: u-boot: section .data.rel vma 0xeffff55c overlaps previous sections
ld: u-boot: section .data.rel.local vma 0xeffffef8 overlaps previous sections
ld: u-boot: section .resetvec vma 0xeffffffc overlaps previous sections
ld: u-boot: section .data.rel.ro vma 0xf000122c overlaps previous sections
ld: u-boot: section .u_boot_cmd vma 0xf000124c overlaps previous sections
make: *** [u-boot] Error 1

Kumar,

If you want this fixed then you or Edmar or someone at Freescale should fix the patch referenced in comment #6.

See http://gcc.gnu.org/ml/gcc-patches/2009-09/msg00592.html

Subject: Bug 40677

Author: jakub
Date: Tue Sep 15 20:12:18 2009
New Revision: 151729

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=151729
Log:
	PR target/41175
	PR target/40677
	* config/rs6000/rs6000.c (no_global_regs_above): Fix precedence
	problem.
	(SAVRES_NOINLINE_GPRS_SAVES_LR, SAVRES_NOINLINE_FPRS_SAVES_LR,
	SAVRES_NOINLINE_FPRS_DOESNT_RESTORE_LR): New strategy bits.
	(rs6000_savres_strategy): Always save FP registers inline if the
	target doesn't support hardware double-precision.  Set the above
	bits in return value when needed.
	(rs6000_savres_routine_sym): Fix computation for cache selector.
	Mark the generated symbol as a function.  Rename exitp argument to
	lr.  Move code for determining the name of the symbol...
	(rs6000_savres_routine_name): ...here.  New function.  Add cases for
	getting the names right on AIX and 64-bit Linux.
	(savres_routine_name): New variable.
	(rs6000_make_savres_rtx): Rename exitp argument to lr.  Don't assert
	lr isn't set when savep.  Use r12 resp. r1 instead of r11 depending
	on what the target routine uses as a base register.  If savep && lr
	describe saving of r0 into memory slot.
	(rs6000_emit_prologue): Correct use of call_used_regs.  Fix out of
	line calls for AIX ABI.
	(rs6000_output_function_prologue): Use rs6000_savres_routine_name to
	determine FP save/restore functions.
	(rs6000_emit_stack_reset): Handle savres if sp_offset != 0 and
	frame_reg_rtx != sp_reg_rtx.  Use gen_add3_insn instead of
	gen_addsi3.
	(rs6000_emit_epilogue): Adjust computation of restore_lr.
	Duplicate restoration of LR and execute the appropriate one
	depending on whether GPRs are being restored inline.  Set r11 from
	offsetted frame_reg_rtx instead of sp_reg_rtx; if frame_reg_rtx is
	r11, adjust sp_offset.  Use gen_add3_insn instead of gen_addsi3.
	Fix out of line calls for AIX ABI.
	* config/rs6000/rs6000.md (*return_and_restore_fpregs_aix_<mode>):
	New insn.
	* config/rs6000/spe.md (*save_gpregs_spe): Use explicit match for
	register 11.
	(*restore_gpregs_spe): Likewise.
	(*return_and_restore_gpregs_spe): Likewise.
	* config/rs6000/linux64.h (SAVE_FP_SUFFIX, RESTORE_FP_SUFFIX):
	Define to empty string unconditionally.
	* config/rs6000/sysv4.h (SAVE_FP_SUFFIX, RESTORE_FP_SUFFIX):
	Define to empty string unconditionally.
	(GP_SAVE_INLINE, FP_SAVE_INLINE): Handle TARGET_64BIT the same as
	!TARGET_64BIT.

	* gcc.target/powerpc/pr41175.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/powerpc/pr41175.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/linux64.h
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/config/rs6000/rs6000.md
    trunk/gcc/config/rs6000/spe.md
    trunk/gcc/config/rs6000/sysv4.h
    trunk/gcc/testsuite/ChangeLog

Fixed for 4.5.0.