use natural align 4 for byval args

rust-lang · Dec 16, 2024 · 51dcfae · 51dcfae
1 parent 83ab648
commit 51dcfae
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/compiler/rustc_target/src/callconv/powerpc64.rs b/compiler/rustc_target/src/callconv/powerpc64.rs
@@ -58,8 +58,9 @@ where
 
     // The AIX ABI expect byval for aggregates
     // See https://github.com/llvm/llvm-project/blob/main/clang/lib/CodeGen/Targets/PPC.cpp.
+    // natural alignment of byval pointer are align 4
     if !is_ret && abi == AIX {
-        arg.pass_by_stack_offset(None);
+        arg.pass_by_stack_offset(Some(Align::from_bytes(4).unwrap()));
         return;
     }