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[Bug tree-optimization/81083] [7/8 Regression] ICE: Unable to coalesce ssa_names 4 and 13 which are marked as MUST COALESCE
- 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: Tue, 13 Jun 2017 12:41:01 +0000
- Subject: [Bug tree-optimization/81083] [7/8 Regression] ICE: Unable to coalesce ssa_names 4 and 13 which are marked as MUST COALESCE
- Auto-submitted: auto-generated
- References: <bug-81083-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81083
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-06-13
Known to work| |6.3.1
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |7.2
Summary|[7 Regression] ICE: Unable |[7/8 Regression] ICE:
|to coalesce ssa_names 4 and |Unable to coalesce
|13 which are marked as MUST |ssa_names 4 and 13 which
|COALESCE |are marked as MUST COALESCE
Ever confirmed|0 |1
Known to fail| |7.1.1, 8.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
<bb 4> [99.96%]:
obj.x = arg_3(ab);
arg_13(ab) = arg_9(D);
_1 = obj.x;
if (_1 != 0)
goto <bb 5>; [33.00%]
else
goto <bb 7>; [67.00%]
<bb 5> [32.99%]:
func ();
<bb 6> [32.98%]:
pretmp_17 = obj.x;
<bb 7> [99.95%]:
# prephitmp_18 = PHI <arg_3(ab)(4), pretmp_17(6)>
caused by PRE.
Mine.