------- Additional Comments From carlos at mind dot be 2005-04-19 09:49 -------
Subject: Re: -many flag causes problems
On Tuesday 19 April 2005 01:34, amodra at bigpond dot net dot au wrote:
> ------- Additional Comments From amodra at bigpond dot net dot au
> 2005-04-18 23:34 ------- Please supply a small testcase. Preprocessed
> source and commands to reproduce the problem.
>
> -many shouldn't ever change which insns are emitted under control of other
> -m flags, just make available extra instructions, so this is really a gas
> bug.
anyway, the problem is fixed if I remove the -many flag from the compiler
line, so that's why I sent the patch.
If you want to test this try the attached file (taken from the ecos source
tree) and compile as following:
powerpc-eabi-gcc -v -c -I/home/carlos/Builds/ecos_ml300-0.1/install/include
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/src
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/tests
-I.
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/src/
-finline-limit=7000
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/ml300/current/include/xilinx
-DML300 -msoft-float -mcpu=405 -Wall -Wpointer-arith -Wstrict-prototypes
-Winline -Wundef -g -O2 -ffunction-sections -fdata-sections -fno-exceptions
-Wp,-MD,src/hal_intr.tmp -o
src/hal_powerpc_arch_hal_intr.o
/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/src/hal_intr.c
which produces the following results:
/mind/toolchain_powerpc-eabi_gcc-3.4.3_binutils-2.14_newlib-1.13/libexec/gcc/powerpc-eabi/3.4.3/cc1
-quiet -v -I/home/carlos/Builds/ecos_ml300-0.1/install/include
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/src
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/tests
-I.
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/src/
-I/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/ml300/current/include/xilinx
-DML300 -MD
src/hal_intr.tmp
/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/src/hal_intr.c
-quiet -dumpbase hal_intr.c -msoft-float -mcpu=405 -auxbase-strip
src/hal_powerpc_arch_hal_intr.o -g -O2 -Wall -Wpointer-arith
-Wstrict-prototypes -Winline -Wundef -version -finline-limit=7000
-ffunction-sections -fdata-sections -fno-exceptions -o /tmp/ccDl04KQ.s
ignoring nonexistent directory
"/mind/toolchain_powerpc-eabi_gcc-3.4.3_binutils-2.14_newlib-1.13/lib/gcc/powerpc-eabi/3.4.3/../../../../powerpc-eabi/sys-include"
ignoring nonexistent directory
"/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/tests"
ignoring duplicate directory
"/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/src/"
#include "..." search starts here:
#include <...> search starts here:
/home/carlos/Builds/ecos_ml300-0.1/install/include
/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current
/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/arch/current/src
.
/home/carlos/Devel/ecos--ml300--0.1/packages/hal/powerpc/ml300/current/include/xilinx
/mind/toolchain_powerpc-eabi_gcc-3.4.3_binutils-2.14_newlib-1.13/lib/gcc/powerpc-eabi/3.4.3/include
/mind/toolchain_powerpc-eabi_gcc-3.4.3_binutils-2.14_newlib-1.13/lib/gcc/powerpc-eabi/3.4.3/../../../../powerpc-eabi/include
End of search list.
GNU C version 3.4.3 (powerpc-eabi)
compiled by GNU C version 3.3.5 (Debian 1:3.3.5-8).
GGC heuristics: --param ggc-min-expand=42 --param ggc-min-heapsize=24026
/mind/toolchain_powerpc-eabi_gcc-3.4.3_binutils-2.14_newlib-1.13/lib/gcc/powerpc-eabi/3.4.3/../../../../powerpc-eabi/bin/as
--traditional-format -m405 -many -V -Qy -o
src/hal_powerpc_arch_hal_intr.o /tmp/ccDl04KQ.s
GNU assembler version 2.14 (powerpc-eabi) using BFD version 2.14 20030612
/tmp/ccDl04KQ.s: Assembler messages:
/tmp/ccDl04KQ.s:72: Error: Unrecognized opcode: `mfdec'
/tmp/ccDl04KQ.s:78: Error: Unrecognized opcode: `mfdec'
as you may seem, it invokes as with the -many flag, which is no required for
405 or 403 (they are specialized ppc procesors). So when it comes to mfdec it
complains because it is not a standard ppc instruction.
------- Additional Comments From carlos at mind dot be 2005-04-19 09:49 -------
Created an attachment (id=8682)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8682&action=view)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21091
