[Bug middle-end/34548] GCC generates too many alignment adds for alloca

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34548

--- Comment #5 from Richard Henderson <rth at gcc dot gnu.org> 2012-08-01 
20:41:25 UTC ---
Author: rth
Date: Wed Aug  1 20:41:16 2012
New Revision: 190051

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190051
Log:
PR 34548

    * function.h (struct rtl_data): Add max_dynamic_stack_alignment.
    * cfgexpand.c (gimple_expand_cfg): Initialise it.
    * explow.c (allocate_dynamic_stack_space): Set it.  Simplify
    alignment requirements given the known alignment of dynamic_offset.
    * function.c (instantiate_virtual_regs): Align dtnamic_offset.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/explow.c
    trunk/gcc/function.c
    trunk/gcc/function.h