[backports-release-1.11] Don't forget to decay value on struct initialization (#59511)

gbaraldi · DilumAluthge · commit d269b23f37ed · 2025-09-12T20:08:46.000-04:00
Fixes #59510 (cherry picked from commit 8230e8b)
diff --git a/src/cgutils.cpp b/src/cgutils.cpp
@@ -3093,6 +3093,7 @@ static void init_bits_value(jl_codectx_t &ctx, Value *newv, Value *v, MDNode *tb
 static void init_bits_cgval(jl_codectx_t &ctx, Value *newv, const jl_cgval_t& v, MDNode *tbaa)
 {
     // newv should already be tagged
+    newv = maybe_decay_tracked(ctx, newv);
     if (v.ispointer()) {
         emit_memcpy(ctx, newv, jl_aliasinfo_t::fromTBAA(ctx, tbaa), v, jl_datatype_size(v.typ), sizeof(void*));
     }

Original file line number	Diff line number	Diff line change
`@@ -3093,6 +3093,7 @@ static void init_bits_value(jl_codectx_t &ctx, Value newv, Value v, MDNode *tb`
`3093`	`3093`	`static void init_bits_cgval(jl_codectx_t &ctx, Value newv, const jl_cgval_t& v, MDNode tbaa)`
`3094`	`3094`	`{`
`3095`	`3095`	`// newv should already be tagged`
	`3096`	`+ newv = maybe_decay_tracked(ctx, newv);`
`3096`	`3097`	`if (v.ispointer()) {`
`3097`	`3098`	`emit_memcpy(ctx, newv, jl_aliasinfo_t::fromTBAA(ctx, tbaa), v, jl_datatype_size(v.typ), sizeof(void*));`
`3098`	`3099`	`}`