------- Comment #4 from hubicka at gcc dot gnu dot org 2010-07-07 01:01 ------- Subject: Bug 44813
Author: hubicka Date: Wed Jul 7 01:00:42 2010 New Revision: 161898 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161898 Log: PR middle-end/44813 * tree-ssa-uninit.c (ssa_undefined_value_p): Result decl is defined for functions passed by reference. * tree.c (needs_to_live_in_memory): RESULT_DECL don't need to live in memory when passed by reference. * tree-ssa-ccp.c (get_default_value): Only VAR_DECL is undefined at beggining. * ipa-split.c (split_function): Cleanup way return value is passed; handle SSA DECL_BY_REFERENCE retvals. * tree-ssa.c (verify_def): Verify that RESULT_DECL is read only when DECL_BY_REFERENCE is set. * tree-ssa-structalias.c (get_constraint_for_ssa_var, get_fi_for_callee, find_what_p_points_to): Handle RESULT_DECL. * tree-inline.c (declare_return_variable): Get new entry_block argument; when passing by reference ensure that RESULT_DECL is gimple_val. (remap_gimple_op_r): Remap RESULT_DECL ssa name. (remap_gimple_stmt): Handle SSA DECL_BY_REFERENCE returns. * g++.dg/torture/pr44813.C: New testcase. * g++.dg/torture/pr44826.C: New testcase. Added: trunk/gcc/testsuite/g++.dg/torture/pr44813.C trunk/gcc/testsuite/g++.dg/torture/pr44826.C Modified: trunk/gcc/ChangeLog trunk/gcc/ipa-split.c trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-inline.c trunk/gcc/tree-ssa-ccp.c trunk/gcc/tree-ssa-structalias.c trunk/gcc/tree-ssa-uninit.c trunk/gcc/tree-ssa.c trunk/gcc/tree.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44813
