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From-SVN: r861
This commit is contained in:
Richard Kenner 1992-04-29 22:20:02 -04:00
parent 3c1aa9830f
commit 052aaaef39
1 changed files with 19 additions and 5 deletions
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24
gcc/genattrtab.c
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@ -96,6 +96,9 @@ struct obstack *rtl_obstack = &obstack;
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free
/* Define this so we can link with print-rtl.o to get debug_rtx function. */
char **insn_name_ptr = 0;
extern void free ();
extern rtx read_rtx ();
@ -724,6 +727,7 @@ check_attr_test (exp, is_const)
{
/* These cases are valid for constant attributes, but can't be
simplified. */
exp = copy_rtx (exp);
RTX_UNCHANGING_P (exp) = 1;
break;
}
@ -1028,8 +1032,8 @@ make_canonical (attr, exp)
case SYMBOL_REF:
if (!attr->is_const || RTX_UNCHANGING_P (exp))
break;
RTX_UNCHANGING_P (exp) = 1;
exp = convert_const_symbol_ref (exp, attr);
RTX_UNCHANGING_P (exp) = 1;
check_attr_value (exp, attr);
/* Goto COND case since this is now a COND. Note that while the
new expression is rescanned, all symbol_ref notes are mared as
@ -1951,13 +1955,20 @@ evaluate_eq_attr (exp, value, insn_code, insn_index)
else
abort ();
/* If uses an address, must return original expression. */
/* If uses an address, must return original expression. But set the
RTX_UNCHANGING_P bit so we don't try to simplify it again. */
address_used = 0;
walk_attr_value (newexp);
if (address_used)
return exp;
{
if (! RTX_UNCHANGING_P (exp))
exp = copy_rtx (exp);
RTX_UNCHANGING_P (exp) = 1;
return exp;
}
else
return newexp;
}
@ -2388,8 +2399,11 @@ simplify_test_exp (exp, insn_code, insn_index)
/* We have already simplified this expression. Simplifying it again
won't buy anything unless we weren't given a valid insn code
to process (i.e., we are canonicalizing something.). */
if (insn_code != -2)
RTX_UNCHANGING_P (newexp) = 1;
if (insn_code != -2 && ! RTX_UNCHANGING_P (newexp))
{
newexp = copy_rtx (newexp);
RTX_UNCHANGING_P (newexp) = 1;
}
return newexp;
}