https://gcc.gnu.org/g:4d3a5618de5a949c61605f545f90e81bc0000502
commit r15-60-g4d3a5618de5a949c61605f545f90e81bc0000502 Author: Richard Biener <rguent...@suse.de> Date: Fri Apr 26 15:47:13 2024 +0200 middle-end/114734 - wrong code with expand_call_mem_ref 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. 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. Diff: --- 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); }