https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61723
--- Comment #6 from Paul Pluzhnikov <ppluzhnikov at google dot com> --- It turns out that the original unreduced test case does not error on trunk @r212277; it only ICEs on gcc-4.8 and gcc-4.9 branches. But once I creduced it using 4.9, the reduced test also ICEd on trunk. I have just verified that the latest 4.9 @r212536 crashes like so on non-reduced test: gcc-svn-4_9-r212536/bin/g++ -c -std=c++11 t.ii -O2 t.cc: In function ‘ZZZZ’: t.cc:22:24: internal compiler error: Segmentation fault 0xb947ff crash_signal ../../gcc/toplev.c:337 0x952096 fold_comparison ../../gcc/fold-const.c:9074 0x95be35 fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*, tree_node*) ../../gcc/fold-const.c:13563 0xbca30d cleanup_control_expr_graph ../../gcc/tree-cfgcleanup.c:112 0xbca30d cleanup_control_flow_bb ../../gcc/tree-cfgcleanup.c:187 0xbca30d cleanup_tree_cfg_bb ../../gcc/tree-cfgcleanup.c:630 0xbcbd48 cleanup_tree_cfg_1 ../../gcc/tree-cfgcleanup.c:675 0xbcbd48 cleanup_tree_cfg_noloop ../../gcc/tree-cfgcleanup.c:731 0xbcbd48 cleanup_tree_cfg() ../../gcc/tree-cfgcleanup.c:786 0xaea194 execute_function_todo ../../gcc/passes.c:1811 0xaeaa83 execute_todo ../../gcc/passes.c:1887 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. This appears to be a different ICE. Should I reduce it?