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[Bug tree-optimization/78542] [7 Regression] wrong code at -Og results in endless loop
- From: "glisse at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 26 Nov 2016 14:36:30 +0000
- Subject: [Bug tree-optimization/78542] [7 Regression] wrong code at -Og results in endless loop
- Auto-submitted: auto-generated
- References: <bug-78542-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78542
Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-11-26
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Indeed. CCP4 says
Visiting PHI node: x_4 = PHI <x_6(D)(2), 1(3)>
Argument #0 (2 -> 3 executable)
x_6(D) Value: CONSTANT x_6(D)
Argument #1 (3 -> 3 not executable)
PHI node value: CONSTANT x_6(D)
and then proceeds with x_4 = x_6.