JIT: Fix alignment for custom layouts with GC refs in them (#122873)

jakobbotsch · web-flow · commit deeec166635a · 2026-01-06T17:17:15.000+01:00
diff --git a/src/coreclr/jit/async.cpp b/src/coreclr/jit/async.cpp
@@ -1092,7 +1092,7 @@ ContinuationLayout AsyncTransformation::LayOutContinuation(BasicBlock*
 
             if (layout->IsCustomLayout())
             {
-                inf.Alignment = 1;
+                inf.Alignment = layout->HasGCPtr() ? TARGET_POINTER_SIZE : 1;
                 inf.Size      = layout->GetSize();
             }
             else

Original file line number	Diff line number	Diff line change
`@@ -1092,7 +1092,7 @@ ContinuationLayout AsyncTransformation::LayOutContinuation(BasicBlock*`
`1092`	`1092`
`1093`	`1093`	`if (layout->IsCustomLayout())`
`1094`	`1094`	`{`
`1095`		`- inf.Alignment = 1;`
	`1095`	`+ inf.Alignment = layout->HasGCPtr() ? TARGET_POINTER_SIZE : 1;`
`1096`	`1096`	`inf.Size = layout->GetSize();`
`1097`	`1097`	`}`
`1098`	`1098`	`else`