[Bug rtl-optimization/78561] Constant pool size (offset) can become stale where constant pool entires become unused

[jgreenhalgh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78561

--- Comment #18 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Author: jgreenhalgh
Date: Wed Dec  7 14:01:59 2016
New Revision: 243345

URL: https://gcc.gnu.org/viewcvs?rev=243345&root=gcc&view=rev
Log:
[Patch PR78561 PowerPC] Revert to old behaviour for counting constant pools

gcc/

        PR rtl-optimization/78561
        * config/rs6000/rs6000.c (rs6000_reg_live_or_pic_offset_p) Use
        constant_pool_empty_p in place of get_pool_size_upper_bound.
        (rs6000_stack_info): Likewise.
        (rs6000_emit_prologue): Likewise.
        (rs6000_elf_declare_function_name): Likewise.
        (rs6000_set_up_by_prologue): Likewise.
        (rs6000_can_eliminate): Likewise.
        * output.h (get_pool_size_upper_bound): Delete.
        (constant_pool_empty_p): New.
        * varasm.c (get_pool_size_upper_bound): Delete
        (constant_pool_empty_p): New.



Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/output.h
    trunk/gcc/varasm.c