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re PR rtl-optimization/61672 (Less redundant instructions deleted by pre_delete after r208113.) 

2014-08-05  Richard Biener  <rguenther@suse.de>

	PR rtl-optimization/61672
	* emit-rtl.h (mem_attrs_eq_p): Declare.
	* emit-rtl.c (mem_attrs_eq_p): Export.  Handle NULL mem-attrs.
	* cse.c (exp_equiv_p): Use mem_attrs_eq_p.
	* cfgcleanup.c (merge_memattrs): Likewise.
	Include emit-rtl.h.

From-SVN: r213638
This commit is contained in:
Richard Biener 2014-08-05 13:05:06 +00:00 committed by Richard Biener
parent b8a5fbd280
commit 96b3c03f4e
5 changed files with 20 additions and 3 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2014-08-05 Richard Biener <rguenther@suse.de>
PR rtl-optimization/61672
* emit-rtl.h (mem_attrs_eq_p): Declare.
* emit-rtl.c (mem_attrs_eq_p): Export. Handle NULL mem-attrs.
* cse.c (exp_equiv_p): Use mem_attrs_eq_p.
* cfgcleanup.c (merge_memattrs): Likewise.
Include emit-rtl.h.
2014-08-05 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* config/aarch64/arm_neon.h (vqdmlals_lane_s32): Use scalar types

3
gcc/cfgcleanup.c
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@ -53,6 +53,7 @@ along with GCC; see the file COPYING3. If not see
#include "df.h"
#include "dce.h"
#include "dbgcnt.h"
#include "emit-rtl.h"
#define FORWARDER_BLOCK_P(BB) ((BB)->flags & BB_FORWARDER_BLOCK)
@ -883,7 +884,7 @@ merge_memattrs (rtx x, rtx y)
if (GET_MODE (x) != GET_MODE (y))
return;
if (code == MEM && MEM_ATTRS (x) != MEM_ATTRS (y))
if (code == MEM && !mem_attrs_eq_p (MEM_ATTRS (x), MEM_ATTRS (y)))
{
if (! MEM_ATTRS (x))
MEM_ATTRS (y) = 0;

2
gcc/cse.c
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@ -2685,7 +2685,7 @@ exp_equiv_p (const_rtx x, const_rtx y, int validate, bool for_gcse)
But because really all MEM attributes should be the same for
equivalent MEMs, we just use the invariant that MEMs that have
the same attributes share the same mem_attrs data structure. */
if (MEM_ATTRS (x) != MEM_ATTRS (y))
if (!mem_attrs_eq_p (MEM_ATTRS (x), MEM_ATTRS (y)))
return 0;
/* If we are handling exceptions, we cannot consider two expressions

6
gcc/emit-rtl.c
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@ -290,9 +290,13 @@ const_fixed_htab_eq (const void *x, const void *y)
/* Return true if the given memory attributes are equal. */
static bool
bool
mem_attrs_eq_p (const struct mem_attrs *p, const struct mem_attrs *q)
{
if (p == q)
return true;
if (!p || !q)
return false;
return (p->alias == q->alias
&& p->offset_known_p == q->offset_known_p
&& (!p->offset_known_p || p->offset == q->offset)

3
gcc/emit-rtl.h
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@ -20,6 +20,9 @@ along with GCC; see the file COPYING3. If not see
#ifndef GCC_EMIT_RTL_H
#define GCC_EMIT_RTL_H
/* Return whether two MEM_ATTRs are equal. */
bool mem_attrs_eq_p (const struct mem_attrs *, const struct mem_attrs *);
/* Set the alias set of MEM to SET. */
extern void set_mem_alias_set (rtx, alias_set_type);