https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69489
--- Comment #10 from amker at gcc dot gnu.org --- (In reply to Andreas Schwab from comment #7) > The second commit triggers this ICE on ia64: > > $ gcc/xgcc -Bgcc/ ../../gcc/gcc/testsuite/gcc.dg/pr70725.c -O3 -S > ../../gcc/gcc/testsuite/gcc.dg/pr70725.c: In function ‘fn1’: > ../../gcc/gcc/testsuite/gcc.dg/pr70725.c:13:1: internal compiler error: in > phi_convertible_by_degenerating_args, at tree-if-conv.c:605 > fn1 () > ^~~ > 0x4000000001c26b3f phi_convertible_by_degenerating_args > ../../gcc/tree-if-conv.c:605 > 0x4000000001c2727f if_convertible_phi_p > ../../gcc/tree-if-conv.c:662 > 0x4000000001c3675f if_convertible_loop_p_1 > ../../gcc/tree-if-conv.c:1408 > 0x4000000001c3700f if_convertible_loop_p > ../../gcc/tree-if-conv.c:1466 > 0x4000000001c374cf tree_if_conversion > ../../gcc/tree-if-conv.c:2774 > 0x4000000001c37d9f execute > ../../gcc/tree-if-conv.c:2875 (In reply to rguent...@suse.de from comment #9) > On Thu, 21 Apr 2016, sch...@linux-m68k.org wrote: > > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69489 > > > > --- Comment #7 from Andreas Schwab <sch...@linux-m68k.org> --- > > The second commit triggers this ICE on ia64: > > > > $ gcc/xgcc -Bgcc/ ../../gcc/gcc/testsuite/gcc.dg/pr70725.c -O3 -S > > ../../gcc/gcc/testsuite/gcc.dg/pr70725.c: In function ‘fn1’: > > ../../gcc/gcc/testsuite/gcc.dg/pr70725.c:13:1: internal compiler error: in > > phi_convertible_by_degenerating_args, at tree-if-conv.c:605 > > fn1 () > > ^~~ > > 0x4000000001c26b3f phi_convertible_by_degenerating_args > > ../../gcc/tree-if-conv.c:605 > > 0x4000000001c2727f if_convertible_phi_p > > ../../gcc/tree-if-conv.c:662 > > 0x4000000001c3675f if_convertible_loop_p_1 > > ../../gcc/tree-if-conv.c:1408 > > 0x4000000001c3700f if_convertible_loop_p > > ../../gcc/tree-if-conv.c:1466 > > 0x4000000001c374cf tree_if_conversion > > ../../gcc/tree-if-conv.c:2774 > > 0x4000000001c37d9f execute > > ../../gcc/tree-if-conv.c:2875 > > Isn't that what was reported in PR70725 for its fix? Does r235341 fix it? I will check this. Also I have a following patch handling general cases in which PHIs can be degenerated and have more than one arguments.
