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Re: fuse-caller-save - hook format

On 17-04-14 18:49, Vladimir Makarov wrote:
I see.  I guess your proposed solution is ok then.


I've updated the fuse-caller-save patch series to model non-callee call clobbers in CALL_INSN_FUNCTION_USAGE.

There are 2 new hooks:

1. call_fusage_contains_non_callee_clobbers.
A hook to indicate whether a target has added the non-callee call clobbers to CALL_INSN_FUNCTION_USAGE, meaning it's safe to do the fuse-caller-save optimization.

2. post_expand_call_insn.
A utility hook to facilitate adding the clobbers to CALL_INSN_FUNCTION_USAGE.

I've bootstrapped and reg-tested on x86_64, and I've build and reg-tested on MIPS.

The series now looks like:

     1	 -fuse-caller-save - Add command line option
     2	 -fuse-caller-save - Add new reg-note REG_CALL_DECL
     3	 Add implicit parameter to find_all_hard_reg_sets
     4	 Register CALL_INSN_FUNCTION_USAGE in find_all_hard_reg_sets
     5	 Add call_fusage_contains_non_callee_clobbers hook
     6	 -fuse-caller-save - Collect register usage information
     7	 -fuse-caller-save - Use collected register usage information
     8	 -fuse-caller-save - Enable by default at O2 and higher
     9	 -fuse-caller-save - Add documentation
    10	 -fuse-caller-save - Add test-case
    11	 Add post_expand_call_insn hook
    12	 Add clobber_reg
    13	 -fuse-caller-save - Enable for MIPS
    14	 -fuse-caller-save - Enable for ARM
    15	 -fuse-caller-save - Enable for AArch64
    16	 -fuse-caller-save - Support in lra
    17	 -fuse-caller-save - Enable for i386

The submission/approval status is:
1-3, 7-10, 16: approved
4: submitted, pinged Eric Botcazou 16-04-2014
5, 11: new hook, need to submit
6, 14-15: approved earlier, but need to resubmit due to updated hook
12: new utility patch, need to submit
13: need to resubmit due to updated hook
17: need to submit

I'll post the patches that need (re)submitting.

- Tom

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