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".
