[Bug 109064] temp_comp_access::get_required_live_range: enclosing_scope_first_write is NULL

* [Bug 109064] temp_comp_access::get_required_live_range: enclosing_scope_first_write is NULL
@ 2018-12-14 22:12 bugzilla-daemon
  2018-12-16  1:29 ` bugzilla-daemon
  0 siblings, 1 reply; 2+ messages in thread
From: bugzilla-daemon @ 2018-12-14 22:12 UTC (permalink / raw)
  To: dri-devel

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https://bugs.freedesktop.org/show_bug.cgi?id=109064

            Bug ID: 109064
           Summary: temp_comp_access::get_required_live_range:
                    enclosing_scope_first_write is NULL
           Product: Mesa
           Version: 18.3
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: alex_y_xu@yahoo.ca
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 142814
  --> https://bugs.freedesktop.org/attachment.cgi?id=142814&action=edit
FS_bb6bfb3018b248ae9b31f50f6cc3c1401308f621.glsl

When loading a game in The Witcher 3, the game crashes.

#0  (anonymous namespace)::temp_comp_access::get_required_live_range
(this=0x7f8f6d259928) at
../mesa-18.3.1/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp:936
        keep_for_full_loop = true
        enclosing_scope = 0x7f8ff7beb0c0
        enclosing_scope_first_read = 0x7f8ff7beb0c0
        enclosing_scope_first_write = <optimized out>
        conditional = <optimized out>
        keep_for_full_loop = <optimized out>
        enclosing_scope_first_read = <optimized out>
        enclosing_scope_first_write = <optimized out>
        conditional = <optimized out>
        enclosing_scope = <optimized out>

I used MESA_SHADER_DUMP_PATH to dump the shaders, and attached the last one in
chronological order (I assume this is probably the one that crashed).

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