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tree-optimization/121703 - UBSAN error with moving from uninit data

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The PR reports

vectorizer.h:276:3: runtime error: load of value 32695, which is not a valid value for type 'internal_fn'

which I believe is from

      slp_node->data = new vect_load_store_data (std::move (ls));

where 'ls' can be partly uninitialized (and that data will be not
used, but of course the move CTOR doesn't know this).  The following
tries to fix that by using value-initialization of 'ls'.

	PR tree-optimization/121703
	* tree-vect-stmts.cc (vectorizable_store): Value-initialize ls.
	(vectorizable_load): Likewise.
This commit is contained in:
Richard Biener
2025-09-05 14:47:33 +02:00
parent ebd64a4251
commit 0887961f9e
1 changed files with 2 additions and 2 deletions
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4
gcc/tree-vect-stmts.cc
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@@ -7881,7 +7881,7 @@ vectorizable_store (vec_info *vinfo,
if (!STMT_VINFO_DATA_REF (stmt_info))
return false;
vect_load_store_data _ls_data;
vect_load_store_data _ls_data{};
vect_load_store_data &ls = slp_node->get_data (_ls_data);
if (cost_vec
&& !get_load_store_type (vinfo, stmt_info, vectype, slp_node, mask_node,
@@ -9451,7 +9451,7 @@ vectorizable_load (vec_info *vinfo,
else
group_size = 1;
vect_load_store_data _ls_data;
vect_load_store_data _ls_data{};
vect_load_store_data &ls = slp_node->get_data (_ls_data);
if (cost_vec
&& !get_load_store_type (vinfo, stmt_info, vectype, slp_node, mask_node,