[Bug 109056] Image load store regressions

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109056

            Bug ID: 109056
           Summary: Image load store regressions
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Keywords: bisected, regression
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: mark.a.janes at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Vulkan tests regresson on i965:

dEQP-VK.image.texel_view_compatible.compute.basic.image_store.bc1_rgb_srgb_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.basic.image_store.bc1_rgb_unorm_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.basic.image_store.bc1_rgba_srgb_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.basic.image_store.bc1_rgba_unorm_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.basic.image_store.bc4_snorm_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.basic.image_store.bc4_unorm_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.extended.image_store.bc1_rgb_srgb_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.extended.image_store.bc1_rgb_unorm_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.extended.image_store.bc1_rgba_srgb_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.extended.image_store.bc1_rgba_unorm_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.extended.image_store.bc4_snorm_block.r16g16b16a16_sfloat
dEQP-VK.image.texel_view_compatible.compute.extended.image_store.bc4_unorm_block.r16g16b16a16_sfloat

In the output for these tests:
error: src->ssa->num_components == num_components
(../src/compiler/nir/nir_validate.c:206)

Bisected to:
06fbcd2cd5cc5702c9039c26d20082a99bc157bf
Author:     Eric Anholt <eric at anholt.net>

intel: Simplify the half-float packing in image load/store lowering.

This was noted by Jason in review when I tried to make a helper for the
old path.

Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>

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