inline: Round word-size cost estimates up

rust-lang · Jan 15, 2021 · a65c050 · a65c050
1 parent 18ec4a9
commit a65c050
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/compiler/rustc_mir/src/transform/inline.rs b/compiler/rustc_mir/src/transform/inline.rs
@@ -382,7 +382,7 @@ impl Inliner<'tcx> {
             // Cost of the var is the size in machine-words, if we know
             // it.
             if let Some(size) = type_size_of(tcx, self.param_env, ty) {
-                cost += (size / ptr_size) as usize;
+                cost += ((size + ptr_size - 1) / ptr_size) as usize;
             } else {
                 cost += UNKNOWN_SIZE_COST;
             }