When expand_call_mem_ref looks at the definition of the address
argument to eventually expand a &TARGET_MEM_REF argument together
with a masked load it fails to honor constraints imposed by SSA
coalescing decisions. The following fixes this.
Boostrap and regtest running on x86_64-unknown-linux-gnu.
PR middle-end/114734
* internal-fn.cc (expand_call_mem_ref): Use
get_gimple_for_ssa_name to get at the def stmt of the address
argument to honor SSA coalescing constraints.
---
gcc/internal-fn.cc | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/gcc/internal-fn.cc b/gcc/internal-fn.cc
index 2c764441cde..0a7053c2286 100644
--- a/gcc/internal-fn.cc
+++ b/gcc/internal-fn.cc
@@ -53,6 +53,8 @@ along with GCC; see the file COPYING3. If not see
#include "rtl-iter.h"
#include "gimple-range.h"
#include "fold-const-call.h"
+#include "tree-ssa-live.h"
+#include "tree-outof-ssa.h"
/* For lang_hooks.types.type_for_mode. */
#include "langhooks.h"
@@ -2964,8 +2966,8 @@ expand_call_mem_ref (tree type, gcall *stmt, int index)
tree tmp = addr;
if (TREE_CODE (tmp) == SSA_NAME)
{
- gimple *def = SSA_NAME_DEF_STMT (tmp);
- if (gimple_assign_single_p (def))
+ gimple *def = get_gimple_for_ssa_name (tmp);
+ if (def && gimple_assign_single_p (def))
tmp = gimple_assign_rhs1 (def);
}
--
2.25.1
