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(recorded_label_ref): New variable. 

(insert): Set instead of cse_jumps_altered.
(cse_main): Initialize it and return 1 if nonzero at end.

From-SVN: r10368
This commit is contained in:
Richard Kenner 1995-09-16 08:38:04 -04:00
parent 10fa1ee296
commit a5dfb4eee2
1 changed files with 9 additions and 6 deletions
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15
gcc/cse.c
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@ -343,6 +343,11 @@ static int max_uid;
static int cse_jumps_altered;
/* Nonzero if we put a LABEL_REF into the hash table. Since we may have put
it into an INSN without a REG_LABEL, we have to rerun jump after CSE
to put in the note. */
static int recorded_label_ref;
/* canon_hash stores 1 in do_not_record
if it notices a reference to CC0, PC, or some other volatile
subexpression. */
@ -1287,14 +1292,11 @@ insert (x, classp, hash, mode)
SET_HARD_REG_BIT (hard_regs_in_table, i);
}
/* If X is a label, show we are altering jumps. We don't KNOW
we are, but we might be putting it into a insn which would
then need a new REG_LABEL note. Be conservative and say
we alter jumps here; we usually will in this case anyway. */
/* If X is a label, show we recorded it. */
if (GET_CODE (x) == LABEL_REF
|| (GET_CODE (x) == CONST && GET_CODE (XEXP (x, 0)) == PLUS
&& GET_CODE (XEXP (XEXP (x, 0), 0)) == LABEL_REF))
cse_jumps_altered = 1;
recorded_label_ref = 1;
/* Put an element for X into the right hash bucket. */
@ -8215,6 +8217,7 @@ cse_main (f, nregs, after_loop, file)
register int i;
cse_jumps_altered = 0;
recorded_label_ref = 0;
constant_pool_entries_cost = 0;
val.path_size = 0;
@ -8370,7 +8373,7 @@ cse_main (f, nregs, after_loop, file)
if (max_elements_made < n_elements_made)
max_elements_made = n_elements_made;
return cse_jumps_altered;
return cse_jumps_altered || recorded_label_ref;
}
/* Process a single basic block. FROM and TO and the limits of the basic