[Bug 83239] New: glbenchmark 2.7 assert

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83239

          Priority: medium
            Bug ID: 83239
          Assignee: idr at freedesktop.org
           Summary: glbenchmark 2.7 assert
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: lemody at gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/DRI/i965
           Product: Mesa

With Mesa master (80771e4) glb2.7 does not start but instead says:

GLBenchmark: brw_fs_live_variables.cpp:141: void
brw::fs_live_variables::setup_def_use(): Assertion `ip == block->start_ip'
failed.

Bisected to:
------------------- 8< ------------------------------------
commit 20a849b4aa63c7fce96b04de674a4c70f054ed9c
Author: Matt Turner <mattst88 at gmail.com>
Date:   Sat Jul 12 21:18:39 2014 -0700

    i965: Use basic-block aware insertion/removal functions.

    To avoid invalidating and recreating the control flow graph. Also stop
    invalidating the CFG in places we didn't add or remove an instruction.

    cfg calculations:     202951 -> 80307 (-60.43%)

    Reviewed-by: Topi Pohjolainen <topi.pohjolainen at intel.com>

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