[Bug 93560] opt_combine_constants failing fabsf(reg->f) == table.imm[i].val assertion

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Jan 2 04:54:23 PST 2016


https://bugs.freedesktop.org/show_bug.cgi?id=93560

            Bug ID: 93560
           Summary: opt_combine_constants failing fabsf(reg->f) ==
                    table.imm[i].val assertion
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: mattst88 at gmail.com
          Reporter: kenneth at whitecape.org
        QA Contact: intel-3d-bugs at lists.freedesktop.org

$ shader_runner shaders/closed/UnrealEngine4/PlatformerGame/232.shader_test
-auto

shader_runner: brw_fs_combine_constants.cpp:302: bool
fs_visitor::opt_combine_constants(): Assertion `fabsf(reg->f) ==
table.imm[i].val' failed.

It looks like the value is some kind of NaN:

(gdb) p reg->f
$1 = -nan(0x400000)
(gdb) p table.imm[i].val
$2 = nan(0x400000)

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