PR 5878
* config/arc/arc.h, config/cris/cris.h, config/i386/i386.h,
config/m68k/m68k.h, config/s390/s390.h, config/sparc/sparc.h
(PIC_OFFSET_TABLE_REGNUM): Conditionalize on flag_pic.
* config/arm/arm.h config/i386/i386.h, config/m68k/m68k.h,
config/sparc/sparc.h (CONDITIONAL_REGISTER_USAGE): Set
PIC_OFFSET_TABLE_REGNUM based on INVALID_REGNUM not flag_pic.
* config/arc/arc.h (CONDITIONAL_REGISTER_USAGE): New.
* config/arm/arm.c (arm_pic_register): Init to INVALID_REGNUM.
(arm_override_options): Set arm_pic_register if TARGET_APCS_STACK
also. Don't set it if not flag_pic.
* config/i386/i386.c (ix86_save_reg): Trust PIC_OFFSET_TABLE_REGNUM
to be INVALID_REGNUM when not used.
* gcc.dg/
20020312-2.c: New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@50713 138bc75d-0d04-0410-961f-82ee72b054a4