diff options
Diffstat (limited to 'gcc/tree-ssa-dse.cc')
| -rw-r--r-- | gcc/tree-ssa-dse.cc | 47 |
1 files changed, 31 insertions, 16 deletions
diff --git a/gcc/tree-ssa-dse.cc b/gcc/tree-ssa-dse.cc index 3c7a2e9..f833803 100644 --- a/gcc/tree-ssa-dse.cc +++ b/gcc/tree-ssa-dse.cc @@ -48,6 +48,7 @@ along with GCC; see the file COPYING3. If not see #include "tree-ssa-loop-niter.h" #include "cfgloop.h" #include "tree-data-ref.h" +#include "internal-fn.h" /* This file implements dead store elimination. @@ -157,23 +158,36 @@ initialize_ao_ref_for_dse (gimple *stmt, ao_ref *write, bool may_def_ok = false) switch (gimple_call_internal_fn (stmt)) { case IFN_LEN_STORE: - ao_ref_init_from_ptr_and_size - (write, gimple_call_arg (stmt, 0), - int_const_binop (MINUS_EXPR, - gimple_call_arg (stmt, 2), - gimple_call_arg (stmt, 4))); - return true; case IFN_MASK_STORE: - /* We cannot initialize a must-def ao_ref (in all cases) but we - can provide a may-def variant. */ - if (may_def_ok) - { - ao_ref_init_from_ptr_and_size - (write, gimple_call_arg (stmt, 0), - TYPE_SIZE_UNIT (TREE_TYPE (gimple_call_arg (stmt, 3)))); - return true; - } - break; + case IFN_LEN_MASK_STORE: + { + int stored_value_index + = internal_fn_stored_value_index (gimple_call_internal_fn (stmt)); + if (gimple_call_internal_fn (stmt) == IFN_LEN_STORE) + { + tree len = gimple_call_arg (stmt, 2); + tree bias = gimple_call_arg (stmt, 4); + if (tree_fits_uhwi_p (len)) + { + ao_ref_init_from_ptr_and_size (write, + gimple_call_arg (stmt, 0), + int_const_binop (MINUS_EXPR, + len, bias)); + return true; + } + } + /* We cannot initialize a must-def ao_ref (in all cases) but we + can provide a may-def variant. */ + if (may_def_ok) + { + ao_ref_init_from_ptr_and_size ( + write, gimple_call_arg (stmt, 0), + TYPE_SIZE_UNIT ( + TREE_TYPE (gimple_call_arg (stmt, stored_value_index)))); + return true; + } + break; + } default:; } } @@ -1502,6 +1516,7 @@ dse_optimize_stmt (function *fun, gimple_stmt_iterator *gsi, sbitmap live_bytes) { case IFN_LEN_STORE: case IFN_MASK_STORE: + case IFN_LEN_MASK_STORE: { enum dse_store_status store_status; store_status = dse_classify_store (&ref, stmt, false, live_bytes); |