https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84831
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-12
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
I am testing this:
diff --git a/gcc/stmt.c b/gcc/stmt.c
index 457fe7f6f78..3a3ff40b682 100644
--- a/gcc/stmt.c
+++ b/gcc/stmt.c
@@ -222,11 +222,12 @@ parse_output_constraint (const char **constraint_p, int
op
erand_num,
from and written to. */
*is_inout = (*p == '+');
+ size_t c_len = strlen (constraint);
+
/* Canonicalize the output constraint so that it begins with `='. */
if (p != constraint || *is_inout)
{
char *buf;
- size_t c_len = strlen (constraint);
if (p != constraint)
warning (0, "output constraint %qc for operand %d "
@@ -247,7 +248,10 @@ parse_output_constraint (const char **constraint_p, int
ope
rand_num,
}
/* Loop through the constraint string. */
- for (p = constraint + 1; *p; p += CONSTRAINT_LEN (*p, p))
+ const char *constraint_end = constraint + c_len;
+ for (p = constraint + 1;
+ p <= constraint_end && *p;
+ p += CONSTRAINT_LEN (*p, p))
switch (*p)
{
case '+':
