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middle-end/114734 - wrong code with expand_call_mem_ref

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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.

(cherry picked from commit 4d3a5618de5a949c61605f545f90e81bc0000502)
This commit is contained in:
Richard Biener 2024-04-26 15:47:13 +02:00
parent 242fbc0df6
commit 5c42872b2a
1 changed files with 4 additions and 2 deletions
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6
gcc/internal-fn.cc
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@ -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);
}