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* config/arm/arm.h (CONDITIONAL_REGISTER_USAGE): Make r11 fixed and
global for -mcaller-super-interworking.
(CALLER_INTERWORKING_SLOT_SIZE): New macro.
* config/arm/arm.c (thumb_compute_save_reg_mask): Save r11 if
CALLER_INTERWORKING_SLOT_SIZE is nonzero and the function does
not need a frame pointer.
(arm_get_frame_offsets): Add CALLER_INTERWORKING_SLOT_SIZE bytes to
the soft frame pointer offset.
(thumb_expand_prologue): Set up r11 for -mcaller-super-interworking.
* config/arm/arm.md (*call_reg_thumb, *call_value_reg_thumb): Use
_interwork_{r7,r11}_call_via_rN if some arguments are passed on
the stack. Use frame_pointer_needed to choose between them.
* config/arm/lib1funcs.asm (_arm_return_{r7,r11}): New functions.
(interwork_with_frame): New macro.
(interwork): Add _interwork_{r7,r11}_call_via_rN().
From-SVN: r89031
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