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From: omakarenko@cyberplat.ru To: gcc-gnats@gcc.gnu.org Subject: c/6916: Wrong assembler code for ARM/Thumb Date: Mon, 03 Jun 2002 04:56:00 -0000 [thread overview] Message-ID: <20020603114651.24601.qmail@sources.redhat.com> (raw) >Number: 6916 >Category: c >Synopsis: Wrong assembler code for ARM/Thumb >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: wrong-code >Submitter-Id: net >Arrival-Date: Mon Jun 03 04:56:00 PDT 2002 >Closed-Date: >Last-Modified: >Originator: omakarenko@cyberplat.ru >Release: unknown-1.0 >Organization: >Environment: GNU C version 3.1 (arm-elf) compiled by GNU C version 2.96 20000731 (RedHat Linux 7.3 2.96-110) Configured with: /home/oleg/arm/tools/gcc/configure --target=arm-elf --enable-languages=c,c++ --disable-shared --disable-nls --with-gnu-as --with-gnu-ld --disable-checking - -with-multilibs --with-newlib --disable-newlib-io-float Thread model:single >Description: The following simple file when compiled with arm-elf-gcc -o test.Os.s -S -Os -mthumb test.c produces code like: ldr r3, [r3, sp] which is wrong for Thumb mode (sp can not be used in thumb mode) gas then complains with "Error: lo register required" -O2 and -O3 give the same result. >How-To-Repeat: arm-elf-gcc -o test.Os.s -S -Os test.c or arm-elf-gcc -o test.Os.o -c -Os test.c >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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