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cselib.c (cselib_init): Use special MEM rtx form for callmem.

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* cselib.c (cselib_init): Use special MEM rtx form for callmem.
	* alias.c (canon_true_dependence): Update comment.

From-SVN: r119358
This commit is contained in:
Steven Bosscher 2006-11-30 07:24:03 +00:00
parent e9ec5c6b5e
commit ac3768f69a
3 changed files with 10 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2006-11-30 Steven Bosscher <steven@gcc.gnu.org>
* cselib.c (cselib_init): Use special MEM rtx form for callmem.
* alias.c (canon_true_dependence): Update comment.
2006-11-30 Steven Bosscher <steven@gcc.gnu.org>
* cgraphunit.c (cgraph_finalize_compilation_unit): Add a newline

2
gcc/alias.c
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@ -2151,7 +2151,7 @@ true_dependence (rtx mem, enum machine_mode mem_mode, rtx x,
return 1;
/* (mem:BLK (scratch)) is a special mechanism to conflict with everything.
This is used in epilogue deallocation functions. */
This is used in epilogue deallocation functions, and in cselib. */
if (GET_MODE (x) == BLKmode && GET_CODE (XEXP (x, 0)) == SCRATCH)
return 1;
if (GET_MODE (mem) == BLKmode && GET_CODE (XEXP (mem, 0)) == SCRATCH)

6
gcc/cselib.c
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@ -1473,9 +1473,11 @@ cselib_init (bool record_memory)
sizeof (cselib_val), 10);
value_pool = create_alloc_pool ("value", RTX_CODE_SIZE (VALUE), 100);
cselib_record_memory = record_memory;
/* This is only created once. */
/* (mem:BLK (scratch)) is a special mechanism to conflict with everything,
see canon_true_dependence. This is only created once. */
if (! callmem)
callmem = gen_rtx_MEM (BLKmode, const0_rtx);
callmem = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode));
cselib_nregs = max_reg_num ();