git
/
gcc
mirror of git://gcc.gnu.org/git/gcc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

re PR rtl-optimization/55489 (insane PRE memory usage with PIE (translate.i)) 

2012-11-27  Paolo Bonzini  <pbonzini@redhat.com>

	PR rtl-optimization/55489
	* gcse.c (compute_transp): Precompute a canonical version
	of XEXP (x, 0), and pass it to canon_true_dependence.

	* alias.c (init_alias_analysis): Fix allocation of reg_known_value.

From-SVN: r193868
This commit is contained in:
Paolo Bonzini 2012-11-27 20:29:15 +00:00 committed by Paolo Bonzini
parent 18e1fd7565
commit 92390dd171
3 changed files with 32 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2012-11-27 Paolo Bonzini <pbonzini@redhat.com>
PR rtl-optimization/55489
* gcse.c (compute_transp): Precompute a canonical version
of XEXP (x, 0), and pass it to canon_true_dependence.
* alias.c (init_alias_analysis): Fix allocation of reg_known_value.
2012-11-27 Diego Novillo <dnovillo@google.com>
* vec.h: Replace 'class vec' with 'struct vec' everywhere.

2
gcc/alias.c
View File

@ -2808,7 +2808,7 @@ init_alias_analysis (void)
timevar_push (TV_ALIAS_ANALYSIS);
vec_alloc (reg_known_value, maxreg - FIRST_PSEUDO_REGISTER);
vec_safe_grow_cleared (reg_known_value, maxreg - FIRST_PSEUDO_REGISTER);
reg_known_equiv_p = sbitmap_alloc (maxreg - FIRST_PSEUDO_REGISTER);
/* If we have memory allocated from the previous run, use it. */

42
gcc/gcse.c
View File

@ -1677,6 +1677,10 @@ compute_transp (const_rtx x, int indx, sbitmap *bmap)
{
bitmap_iterator bi;
unsigned bb_index;
rtx x_addr;
x_addr = get_addr (XEXP (x, 0));
x_addr = canon_rtx (x_addr);
/* First handle all the blocks with calls. We don't need to
do any list walking for them. */
@ -1685,27 +1689,27 @@ compute_transp (const_rtx x, int indx, sbitmap *bmap)
bitmap_clear_bit (bmap[bb_index], indx);
}
/* Now iterate over the blocks which have memory modifications
but which do not have any calls. */
EXECUTE_IF_AND_COMPL_IN_BITMAP (modify_mem_list_set,
blocks_with_calls,
0, bb_index, bi)
{
vec<modify_pair> list
= canon_modify_mem_list[bb_index];
modify_pair *pair;
unsigned ix;
/* Now iterate over the blocks which have memory modifications
but which do not have any calls. */
EXECUTE_IF_AND_COMPL_IN_BITMAP (modify_mem_list_set,
blocks_with_calls,
0, bb_index, bi)
{
vec<modify_pair> list
= canon_modify_mem_list[bb_index];
modify_pair *pair;
unsigned ix;
FOR_EACH_VEC_ELT_REVERSE (list, ix, pair)
{
rtx dest = pair->dest;
rtx dest_addr = pair->dest_addr;
FOR_EACH_VEC_ELT_REVERSE (list, ix, pair)
{
rtx dest = pair->dest;
rtx dest_addr = pair->dest_addr;
if (canon_true_dependence (dest, GET_MODE (dest),
dest_addr, x, NULL_RTX))
bitmap_clear_bit (bmap[bb_index], indx);
}
}
if (canon_true_dependence (dest, GET_MODE (dest),
dest_addr, x, x_addr))
bitmap_clear_bit (bmap[bb_index], indx);
}
}
}
x = XEXP (x, 0);