df_simulate_initialize_backwards (merge_bb, test_use);
for (insn = across_to; ; insn = next)
{
- if (CALL_P (insn))
- {
- if (RTL_CONST_OR_PURE_CALL_P (insn))
- /* Pure functions can read from memory. Const functions can
- read from arguments that the ABI has forced onto the stack.
- Neither sort of read can be volatile. */
- memrefs_in_across |= MEMREF_NORMAL;
- else
- {
- memrefs_in_across |= MEMREF_VOLATILE;
- mem_sets_in_across |= MEMREF_VOLATILE;
- }
- }
if (NONDEBUG_INSN_P (insn))
{
df_simulate_find_defs (insn, test_set);