[PATCH] strstr-simple: pacify GCC 12.1

[Paul Eggert]

* lib/str-two-way.h (two_way_long_needle): Pacify GCC 12.1
-Wsuggest-attribute=pure (x86-64, -O2).
---
 ChangeLog         | 6 ++++++
 lib/str-two-way.h | 4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 30ffdcb7c3..327100aaf1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2022-05-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+       strstr-simple: pacify GCC 12.1
+       * lib/str-two-way.h (two_way_long_needle): Pacify GCC 12.1
+       -Wsuggest-attribute=pure (x86-64, -O2).
+
 2022-05-20  Paul Eggert  <eggert@cs.ucla.edu>
 
        dfa: steer cleer of POSIX-reserved symbols
diff --git a/lib/str-two-way.h b/lib/str-two-way.h
index 7ee344aea1..b00017c0b4 100644
--- a/lib/str-two-way.h
+++ b/lib/str-two-way.h
@@ -231,7 +231,7 @@ critical_factorization (const unsigned char *needle, size_t 
needle_len,
    most 2 * HAYSTACK_LEN - NEEDLE_LEN comparisons occur in searching.
    If AVAILABLE modifies HAYSTACK_LEN (as in strstr), then at most 3 *
    HAYSTACK_LEN - NEEDLE_LEN comparisons occur in searching.  */
-static RETURN_TYPE
+static RETURN_TYPE _GL_ATTRIBUTE_PURE
 two_way_short_needle (const unsigned char *haystack, size_t haystack_len,
                       const unsigned char *needle, size_t needle_len)
 {
@@ -325,7 +325,7 @@ two_way_short_needle (const unsigned char *haystack, size_t 
haystack_len,
    If AVAILABLE modifies HAYSTACK_LEN (as in strstr), then at most 3 *
    HAYSTACK_LEN - NEEDLE_LEN comparisons occur in searching, and
    sublinear performance is not possible.  */
-static RETURN_TYPE
+static RETURN_TYPE _GL_ATTRIBUTE_PURE
 two_way_long_needle (const unsigned char *haystack, size_t haystack_len,
                      const unsigned char *needle, size_t needle_len)
 {
-- 
2.36.1