re PR tree-optimization/70144 (g++ ICE at -O1 and above on valid code on x86_64-linux-gnu in "copy_reference_ops_from_ref")
PR c++/70144
* cp-tree.h (magic_varargs_p): Return int instead of bool.
* call.c (magic_varargs_p): Return int instead of bool, return 2 for
Cilk+ reductions, otherwise 1 for magic varargs and 0 for normal
varargs.
(build_over_call): If magic_varargs_p == 2, call reject_gcc_builtin,
if magic_varargs_p == 1, call decay_conversion
instead of mark_type_use. Don't store error_mark_node arguments to
argarray, instead return error_mark_node.
* c-c++-common/pr70144-1.c: New test.
* c-c++-common/pr70144-2.c: New test.
From-SVN: r234297
