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genrecog.c (validate_pattern): Check matching constraint refers to a lower numbered operand.

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* genrecog.c (validate_pattern): Check matching constraint refers
        to a lower numbered operand.

From-SVN: r222418
This commit is contained in:
Chen Gang 2015-04-24 18:40:43 +00:00 committed by Jeff Law
parent 6d7d9f0eae
commit 6f96dcebb2
2 changed files with 34 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-04-24 Chen Gang <gang.chen.5i5j@gmail.com>
* genrecog.c (validate_pattern): Check matching constraint refers
to a lower numbered operand.
2015-04-24 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/65849

30
gcc/genrecog.c
View File

@ -503,7 +503,8 @@ validate_pattern (rtx pattern, rtx insn, rtx set, int set_code)
if (code == MATCH_OPERAND)
{
const char constraints0 = XSTR (pattern, 2)[0];
const char *constraints = XSTR (pattern, 2);
const char constraints0 = constraints[0];
if (!constraints_supported_in_insn_p (insn))
{
@ -537,6 +538,33 @@ validate_pattern (rtx pattern, rtx insn, rtx set, int set_code)
"operand %d missing output reload",
XINT (pattern, 0));
}
/* For matching constraint in MATCH_OPERAND, the digit must be a
smaller number than the number of the operand that uses it in the
constraint. */
while (1)
{
while (constraints[0]
&& (constraints[0] == ' ' || constraints[0] == ','))
constraints++;
if (!constraints[0])
break;
if (constraints[0] >= '0' && constraints[0] <= '9')
{
int val;
sscanf (constraints, "%d", &val);
if (val >= XINT (pattern, 0))
error_with_line (pattern_lineno,
"constraint digit %d is not smaller than"
" operand %d",
val, XINT (pattern, 0));
}
while (constraints[0] && constraints[0] != ',')
constraints++;
}
}
/* Allowing non-lvalues in destinations -- particularly CONST_INT --