[flang-rt] Fixed freestanding memmove. (#128604)

vzakhari · web-flow · commit 724b91b46783 · 2025-02-24T16:56:28.000-08:00
diff --git a/flang/include/flang/Runtime/freestanding-tools.h b/flang/include/flang/Runtime/freestanding-tools.h
@@ -88,7 +88,7 @@ static inline RT_API_ATTRS void *memmove(
   const char *from{reinterpret_cast<const char *>(src)};
 
   if (to == from) {
-    return;
+    return dest;
   }
   if (to + count <= from || from + count <= to) {
     std::memcpy(dest, src, count);

Original file line number	Diff line number	Diff line change
`@@ -88,7 +88,7 @@ static inline RT_API_ATTRS void *memmove(`
`88`	`88`	`const char from{reinterpret_cast<const char >(src)};`
`89`	`89`
`90`	`90`	`if (to == from) {`
`91`		`- return;`
	`91`	`+ return dest;`
`92`	`92`	`}`
`93`	`93`	`if (to + count <= from \|\| from + count <= to) {`
`94`	`94`	`std::memcpy(dest, src, count);`