Re: [PATCH] ira: Respect HARD_REGNO_CALL_PART_CLOBBERED

["Anatoly Sokolov" <aesok at post dot ru>]

Hi.

----- Original Message ----- 
From: "Andreas Krebbel" <krebbel@linux.vnet.ibm.com>
To: <gcc-patches@gcc.gnu.org>
Cc: <vmakarov@redhat.com>
Sent: Thursday, October 21, 2010 9:14 PM
Subject: [PATCH] ira: Respect HARD_REGNO_CALL_PART_CLOBBERED


> +    for (reg = 0; reg < FIRST_PSEUDO_REGISTER; reg++)
> +      if (!call_used_regs[reg]
Please use "if (! TEST_HARD_REG_BIT (call_used_reg_set, reg)"  instead.

> +  && HARD_REGNO_CALL_PART_CLOBBERED (reg, a->mode))
>
> Index: gcc/ira-lives.c
> ===================================================================
> *** gcc/ira-lives.c.orig
> --- gcc/ira-lives.c
> *************** process_bb_node_lives (ira_loop_tree_nod
> *** 1169,1174 ****
> --- 1169,1185 ----
>    ira_object_t obj = ira_object_id_map[i];
>    ira_allocno_t a = OBJECT_ALLOCNO (obj);
>    int num = ALLOCNO_NUM (a);
> +   int reg;
> + 
> +   /* Allocnos bigger than the saved part of call saved
> +      regs must conflict with them.  */
> +   for (reg = 0; reg < FIRST_PSEUDO_REGISTER; reg++)
> +     if (!call_used_regs[reg]

The same.

> + && HARD_REGNO_CALL_PART_CLOBBERED (reg, obj->allocno->mode))
> +       {
> + SET_HARD_REG_BIT (OBJECT_CONFLICT_HARD_REGS (obj), reg);
> + SET_HARD_REG_BIT (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj), reg);
> +       }
>  
>    /* Don't allocate allocnos that cross setjmps or any
>       call, if this function receives a nonlocal

Anatoly.