Suppress MSAN detections in deflate's slide_hash().
slide_hash() knowingly reads potentially uninitialized memory, see
comment lower down about prev[n] potentially being garbage. In
this case, the result is never used.
diff --git a/deflate.c b/deflate.c
index c271d01..1ede12a 100644
--- a/deflate.c
+++ b/deflate.c
@@ -179,6 +179,11 @@
* bit values at the expense of memory usage). We slide even when level == 0 to
* keep the hash table consistent if we switch back to level > 0 later.
*/
+#if defined(__has_feature)
+# if __has_feature(memory_sanitizer)
+ __attribute__((no_sanitize("memory")))
+# endif
+#endif
local void slide_hash(deflate_state *s) {
unsigned n, m;
Posf *p;
