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gcse.c (struct reg_use): Remove unused struct.

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* gcse.c (struct reg_use): Remove unused struct.
	(gcse_emit_move_after): Do not create REG_EQUAL notes that reference
	the SET_DEST of the instruction the note would be attached to.
	* cse.c (cse_main): Add the DF_NOTE problem.

From-SVN: r194108
This commit is contained in:
Steven Bosscher 2012-12-03 23:28:42 +00:00
parent cef1bc586c
commit dca3da7afc
3 changed files with 16 additions and 6 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-12-03 Steven Bosscher <steven@gcc.gnu.org>
* gcse.c (struct reg_use): Remove unused struct.
(gcse_emit_move_after): Do not create REG_EQUAL notes that reference
the SET_DEST of the instruction the note would be attached to.
* cse.c (cse_main): Add the DF_NOTE problem.
2012-12-03 Jakub Jelinek <jakub@redhat.com>
* sanitizer.def: Add Address Sanitizer builtins.

1
gcc/cse.c
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@ -6520,6 +6520,7 @@ cse_main (rtx f ATTRIBUTE_UNUSED, int nregs)
int i, n_blocks;
df_set_flags (DF_LR_RUN_DCE);
df_note_add_problem ();
df_analyze ();
df_set_flags (DF_DEFER_INSN_RESCAN);

14
gcc/gcse.c
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@ -255,8 +255,6 @@ int flag_rerun_cse_after_global_opts;
/* An obstack for our working variables. */
static struct obstack gcse_obstack;
struct reg_use {rtx reg_rtx; };
/* Hash table of expressions. */
struct expr
@ -2491,23 +2489,27 @@ gcse_emit_move_after (rtx dest, rtx src, rtx insn)
rtx new_rtx;
rtx set = single_set (insn), set2;
rtx note;
rtx eqv;
rtx eqv = NULL_RTX;
/* This should never fail since we're creating a reg->reg copy
we've verified to be valid. */
new_rtx = emit_insn_after (gen_move_insn (dest, src), insn);
/* Note the equivalence for local CSE pass. */
/* Note the equivalence for local CSE pass. Take the note from the old
set if there was one. Otherwise record the SET_SRC from the old set
unless DEST is also an operand of the SET_SRC. */
set2 = single_set (new_rtx);
if (!set2 || !rtx_equal_p (SET_DEST (set2), dest))
return new_rtx;
if ((note = find_reg_equal_equiv_note (insn)))
eqv = XEXP (note, 0);
else
else if (! REG_P (dest)
|| ! reg_mentioned_p (dest, SET_SRC (set)))
eqv = SET_SRC (set);
set_unique_reg_note (new_rtx, REG_EQUAL, copy_insn_1 (eqv));
if (eqv != NULL_RTX)
set_unique_reg_note (new_rtx, REG_EQUAL, copy_insn_1 (eqv));
return new_rtx;
}