[Bug 95242] piglit.spec.arb_separate_shader_objects.execution.layout-location-named-block regression

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95242

            Bug ID: 95242
           Summary: piglit.spec.arb_separate_shader_objects.execution.layo
                    ut-location-named-block regression
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: mark.a.janes at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

mesa 0d88b15f073d09afed1747d9cdde98f15c7aa28d regressed this test:

Standard Output

/tmp/build_root/m64/lib/piglit/bin/shader_runner
/tmp/build_root/m64/lib/piglit/tests/spec/arb_separate_shader_objects/execution/layout-location-named-block.shader_test
-auto
piglit: debug: Requested an OpenGL 3.2 Core Context, and received a matching
3.3 context

Standard Error

Failed to link:
error: fragment shader input `name2' with explicit location has no matching
output
error: fragment shader input `name' with explicit location has no matching
output

------------------------------------------------------------
Author:     Timothy Arceri <timothy.arceri at collabora.com>
glsl: cross validate varyings with a component qualifier

This change checks for component overlap, including handling overlap of
locations and components by doubles. Previously there was no validation
for assigning explicit locations to a location used by the second half
of a double.

V3: simplify handling of doubles and fix double component aliasing
detection

V2: fix component matching for matricies

Reviewed-by: Anuj Phogat <anuj.phogat at gmail.com>
Reviewed-by: Edward O'Callaghan <eocallaghan at alterapraxis.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

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