[Mesa-dev] [Bug 104777] Attaching multiple shader objects for the same stage to a GLSL program triggers a linker error

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104777

Juan A. Suarez <jasuarez at igalia.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #3 from Juan A. Suarez <jasuarez at igalia.com> ---
commit 4195eed961ccfe404ae81b9112189fc93a254ded
Author: Juan A. Suarez Romero <jasuarez at igalia.com>
Date:   Mon Feb 5 17:38:39 2018 +0100

    glsl/linker: check same name is not used in block and outside

    According with OpenGL GLSL 3.20 spec, section 4.3.9:

      "It is a link-time error if any particular shader interface
       contains:
         - two different blocks, each having no instance name, and each
           having a member of the same name, or
         - a variable outside a block, and a block with no instance name,
           where the variable has the same name as a member in the block."

    This fixes a previous commit 9b894c8 ("glsl/linker: link-error using the
    same name in unnamed block and outside") that covered this case, but
    did not take in account that precision qualifiers are ignored when
    comparing blocks with no instance name.

    With this commit, the original tests
    KHR-GL*.shaders.uniform_block.common.name_matching keep fixed, and also
    dEQP-GLES31.functional.shaders.linkage.uniform.block.differing_precision
    regression is fixed, which was broken by previous commit.

    v2: use helper varibles (Matteo Bruni)

    Fixes: 9b894c8 ("glsl/linker: link-error using the same name in unnamed
block and outside")
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104668
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104777
    CC: Mark Janes <mark.a.janes at intel.com>
    CC: "18.0" <mesa-stable at lists.freedesktop.org>
    Tested-by: Matteo Bruni <matteo.mystral at gmail.com>
    Reviewed-by: Tapani Pälli <tapani.palli at intel.com>
    Signed-off-by: Juan A. Suarez Romero <jasuarez at igalia.com>

 src/compiler/glsl/linker.cpp | 53
++++++++++++++++++++++++++++++-----------------------
 1 file changed, 30 insertions(+), 23 deletions(-)

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