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[PATCH/RFA] ARM -- Implement ATPCS stack alignment rules

On Tue, Nov 05, 2002 at 08:12:34AM -0800, Jason R Thorpe wrote:

 > OK, I've folded this in.  Lemme try and track down the source of these
 > regressions, and I'll post another patch...

Ok, the source of the Thumb regressions has been found (thanks a million,
Richard :-), and an arm-elf sim testsuite run is in-progress.

OK for mainline if it passes?

2002-11-06  Jason Thorpe  <> 

        * config/arm/arm-protos.h (arm_get_frame_size)
        (thumb_get_frame_size): New prototypes.
        * config/arm/arm.c (arm_get_frame_size)
        (thumb_get_frame_size): New functions.
        (use_return_insn, arm_output_epilogue, arm_output_function_epilogue)
        (arm_compute_initial_elimination_offset, arm_expand_prologue): Use
        (thumb_expand_prologue, thumb_expand_epilogue): Use
        * config/arm/arm.h (PREFERRED_STACK_BOUNDARY): Define.
        (machine_function): Add frame_size member.
        (THUMB_INITIAL_ELIMINATION_OFFSET): Use thumb_get_frame_size.

2002-11-05  Richard Earnshaw  (

        * arm.c (bit_count): Make argument unsigned long.  Return unsigned.
        Adjust code to use portable unsigned bit manipulation.
        (insn_flags, tune_flags): Change type to unsigned.
        (struct processors): Make flags unsigned long.
        (arm_override_options): Change type of count and current_bit_count
        to unsigned.

        -- Jason R. Thorpe <>

Attachment: arm-stack-patch
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