Add missing reserve assume for LLVM

Signed-off-by: Alex Saveau <saveau.alexandre@gmail.com>

Author: SUPERCILEX

library/alloc/src/raw_vec.rs

@@ -308,6 +308,10 @@ impl<T, A: Allocator> RawVec<T, A> {
         if self.needs_to_grow(len, additional) {
             do_reserve_and_handle(self, len, additional);
         }
+        unsafe {
+            // Inform the optimizer that the reservation has succeeded or wasn't needed
+            intrinsics::assume(!self.needs_to_grow(len, additional));
+        }
     }
 
     /// A specialized version of `reserve()` used only by the hot and
@@ -325,7 +329,7 @@ impl<T, A: Allocator> RawVec<T, A> {
         }
         unsafe {
             // Inform the optimizer that the reservation has succeeded or wasn't needed
-            core::intrinsics::assume(!self.needs_to_grow(len, additional));
+            intrinsics::assume(!self.needs_to_grow(len, additional));
         }
         Ok(())
     }
@@ -363,7 +367,7 @@ impl<T, A: Allocator> RawVec<T, A> {
         }
         unsafe {
             // Inform the optimizer that the reservation has succeeded or wasn't needed
-            core::intrinsics::assume(!self.needs_to_grow(len, additional));
+            intrinsics::assume(!self.needs_to_grow(len, additional));
         }
         Ok(())
     }