[Bug 89970] New: i965/fs CSE should copy propagate into logic operations with signed arguments

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89970

            Bug ID: 89970
           Summary: i965/fs CSE should copy propagate into logic
                    operations with signed arguments
           Product: Mesa
           Version: git
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: idr at freedesktop.org
        QA Contact: intel-3d-bugs at lists.freedesktop.org

With some other Boolean and gl_FrontFacing work that I'm doing, I've noticed
that occasionally something like

not(8)          g37<1>D         g29<8,8,1>D                     { align1 1Q
compacted };
and(8)          g38<1>D         g37<8,8,1>D     0x3f800000UD    { align1 1Q };

is generated.  Instead, this should be

and(8)          g38<1>UD        -g29<8,8,1>UD   0x3f800000UD    { align1 1Q };

I'm submitting a bug so that I don't forget about this.

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