Re: [PATCH v3, rs6000] Add -mspeculate-indirect-jumps option and implement non-speculating bctr / bctrl

[Sandra Loosemore]

On 01/15/2018 04:09 PM, Bill Schmidt wrote:

[gcc]

2018-01-15  Bill Schmidt  <wschm...@linux.vnet.ibm.com>

        * config/rs6000/rs6000.c (rs6000_opt_vars): Add entry for
        -mspeculate-indirect-jumps.
        * config/rs6000/rs6000.md (*call_indirect_elfv2<mode>): Disable
        for -mno-speculate-indirect-jumps.
        (*call_indirect_elfv2<mode>_nospec): New define_insn.
        (*call_value_indirect_elfv2<mode>): Disable for
        -mno-speculate-indirect-jumps.
        (*call_value_indirect_elfv2<mode>_nospec): New define_insn.
        (indirect_jump): Emit different RTL for
        -mno-speculate-indirect-jumps.
        (*indirect_jump<mode>): Disable for
        -mno-speculate-indirect-jumps.
        (*indirect_jump<mode>_nospec): New define_insn.
        (tablejump): Emit different RTL for
        -mno-speculate-indirect-jumps.
        (tablejumpsi): Disable for -mno-speculate-indirect-jumps.
        (tablejumpsi_nospec): New define_expand.
        (tablejumpdi): Disable for -mno-speculate-indirect-jumps.
        (tablejumpdi_nospec): New define_expand.
        (*tablejump<mode>_internal1): Disable for
        -mno-speculate-indirect-jumps.
        (*tablejump<mode>_internal1_nospec): New define_insn.
        * config/rs6000/rs6000.opt (mspeculate-indirect-jumps): New
        option.

I see no documentation for the new option here....  :-(

-Sandra