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[Bug rtl-optimization/50765] [4.7 Regression] ICE: in expand_insn, at optabs.c:7681 with -ftree-vectorize -fno-tree-dce
- 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: Thu, 27 Oct 2011 11:11:15 +0000
- Subject: [Bug rtl-optimization/50765] [4.7 Regression] ICE: in expand_insn, at optabs.c:7681 with -ftree-vectorize -fno-tree-dce
- Auto-submitted: auto-generated
- References: <bug-50765-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50765
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011-10-27
Ever Confirmed|0 |1
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-27 11:11:15 UTC ---
Confirmed.
#2 0x0000000000a41dad in expand_insn (icode=CODE_FOR_vec_unpacks_lo_v4si,
nops=2, ops=0x7fffffffcb60)
at /space/rguenther/src/svn/trunk/gcc/optabs.c:7824
7824 gcc_unreachable ();
(gdb) l
7819 void
7820 expand_insn (enum insn_code icode, unsigned int nops,
7821 struct expand_operand *ops)
7822 {
7823 if (!maybe_expand_insn (icode, nops, ops))
7824 gcc_unreachable ();
It seems we expand some useless unpacking?