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[Bug tree-optimization/69292] [graphite] ICE with -floop-nest-optimize
- From: "vries at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 15 Jan 2016 09:35:04 +0000
- Subject: [Bug tree-optimization/69292] [graphite] ICE with -floop-nest-optimize
- Auto-submitted: auto-generated
- References: <bug-69292-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69292
--- Comment #3 from vries at gcc dot gnu.org ---
After isl code generation, the first BB is bb 28:
...
<bb 28>:
if (1 != 0)
goto <bb 30>;
else
goto <bb 2>;
<bb 30>:
<bb 33>:
_48 = _8 > 0;
if (_48 != 0)
goto <bb 40>;
else
goto <bb 36>;
...
The ICE during update_ssa happens while updating stmt '_48 = _8 > 0' because it
cannot find a reaching def for _8.