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[Bug middle-end/53411] [4.8 Regression] ICE in move_unallocated_pseudos
- From: "bernds at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 21 May 2012 16:52:06 +0000
- Subject: [Bug middle-end/53411] [4.8 Regression] ICE in move_unallocated_pseudos
- Auto-submitted: auto-generated
- References: <bug-53411-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53411
--- Comment #3 from Bernd Schmidt <bernds at gcc dot gnu.org> 2012-05-21 16:52:06 UTC ---
Odd. The following is in 190r.asmcons:
(insn 39 51 141 3 (set (reg:DI 135 [ D.1745 ])
(sign_extend:DI (reg:SI 132 [ j ]))) regehr.c:22 122
{*extendsidi2_rex64}
(expr_list:REG_DEAD (reg:SI 132 [ j ])
(expr_list:REG_UNUSED (reg:DI 135 [ D.1745 ])
(nil))))
That insn has no purpose. We then run delete_trivially_dead_insns in IRA... but
it happens after find_moveable_pseudos, and probably needs to happen before as
well.