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[Bug tree-optimization/83241] [8 regression] ICE in verify_use after store-merging
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 01 Dec 2017 14:40:43 +0000
- Subject: [Bug tree-optimization/83241] [8 regression] ICE in verify_use after store-merging
- Auto-submitted: auto-generated
- References: <bug-83241-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83241
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-01
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|[8 regression] segmentation |[8 regression] ICE in
|fault in dce |verify_use after
| |store-merging
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
(gdb) p debug_tree (ssa_name)
<ssa_name 0x7ffff689cb88 nothrow public visited var <var_decl 0x7ffff69e4000
.MEM>
def_stmt
version:8 in-free-list>
$1 = void
some unlink_stmt_vdef () missing?
<bb 2> [local count: 1073741825]:
# .MEM_6 = VDEF <.MEM_5(D)>
c = a;
# VUSE <.MEM_8>
_13 = MEM[(int *)&c + 4B];
# VUSE <.MEM_6>
_1 = c.md_tmplt_hdr_dma;
_2 = (short int) _1;
_3 = _1 >> 16;
_4 = (short int) _3;
# .MEM_10 = VDEF <.MEM_6>
MEM[(short int *)&b + 12B] = _13;
...