[Bug ipa/69241] [6 Regression] ICE with noreturn and function that return non-POD

[abe_skolnik at yahoo dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69241

--- Comment #10 from Abe <abe_skolnik at yahoo dot com> ---
Adding either of the following flags to "-O1" causes the compiler to ICE on the
most-reduced test case; adding any of the other "-f<...>" flags I tested [39 of
them including the following 2] did not enable the ICE:

  -fipa-icf
  -fipa-icf-functions


Using either of those flags results in exactly the same ICE with exactly the
same output...



C++11_v1_.cpp: In function ‘R f()’:
C++11_v1_.cpp:3:3: internal compiler error: in assign_temp, at function.c:961
 R f(){V(0);}
   ^

0xa2215c assign_temp(tree_node*, int, int)
        ../../gcc/function.c:961
0x8b2611 expand_call(tree_node*, rtx_def*, int)
        ../../gcc/calls.c:2559
0x9b72d2 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        ../../gcc/expr.c:10575
0x8c350c expand_expr
        ../../gcc/expr.h:256
0x8c350c expand_call_stmt
        ../../gcc/cfgexpand.c:2648
0x8c350c expand_gimple_stmt_1
        ../../gcc/cfgexpand.c:3536
0x8c350c expand_gimple_stmt
        ../../gcc/cfgexpand.c:3702
0x8c5801 expand_gimple_tailcall
        ../../gcc/cfgexpand.c:3749
0x8c5801 expand_gimple_basic_block
        ../../gcc/cfgexpand.c:5685
0x8cac06 execute
        ../../gcc/cfgexpand.c:6323
Please submit a full bug report,
with preprocessed source if appropriate.



Of note, "-fipa-icf-variables" is one of those that does _not_ trigger the ICE
when added to "-O1".