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[Bug tree-optimization/32694] [4.1/4.2 Regression] ICE in chain_of_csts_start
- From: "jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 9 Jul 2007 12:52:24 -0000
- Subject: [Bug tree-optimization/32694] [4.1/4.2 Regression] ICE in chain_of_csts_start
- References: <bug-32694-87@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from jakub at gcc dot gnu dot org 2007-07-09 12:52 -------
x86_64-linux.
Rebuilding gcc 4.2 with --enable-checking yields a verify_stmt failure already
after ccp, which changes
WordS64D.1870 xD.1876;
long long intD.5 D.1879;
...
D.1879_7 = 9223372036854775807 - cD.1875_4;
if (D.1879_7 < xD.1876_6) goto <L2>; else goto <L6>;
into:
WordS64D.1870 xD.1876;
if ((long long intD.5) xD.1876_6 == 9223372036854775807) goto <L2>; else goto
<L6>;
which is invalid gimple. But the operands of the comparison had different
types
of arguments already before. Guess the gimple type system patches cured this
on the trunk.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32694