nv50,nvc0: always pull out bufctx on context destruction

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 7d11b761f248ebf5cc2c6732e67656f828afb110)
nv50: setup scissors on clear_render_target/depth_stencil

[imirkin: add logic to also clear the "regular" scissors]
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 200382be8576c43a668724c77b0f1b5a80b3adba)
nv50,nvc0: set constbufs dirty on pipe context switch

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 49eccef06b0b4ca7d7cef0d76c2c251dd679c3bc)
nv50/ir/tgsi: TGSI_OPCODE_POW replicates its result

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 2f2d1b3d9b090aeba316d6c425c23e92340b5502)
nv50/ir/opt: fix constant folding with saturate modifier

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 3b0867f35b5b294eb0d40524a6bc4c8de888a96f)
nv50/ir: fix lowering of predicated instructions (without defs)

Note that predicated instructions with defs are still not supported
because transformation to SSA doesn't handle them yet.

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 452a4151aa1eebbc12b621a465fc452fdb95a08b)
nv50/ir/tgsi: optimize KIL

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit d479713d25699c168af807ad36068691af11d0e0)
Revert "i965/vec4: Change vec4_visitor::emit_lrp to use MAC for gen<6"

This reverts commit 2dfbbeca50b95ccdd714d9baa4411c779f6a20d9 with the
comment about MAC and implicit accumulator removed.

Why this code didn't work in all circumstances is unknown and without a
working Ironlake simulator (which uses a different AUB format) we'll
probably never know, short of a lot of experimentation, and spending a
bunch of time to try to optimize a few instructions on Ironlake is not
time well spent.

Moreover, for mix(vec4, vec4, vec4) using the accumulator introduces a
dependence between the otherwise independent per-component calculations.
Not using the accumulator, even if it means an extra instruction per
component might be preferable. We don't know, we don't have data, and
we don't have the necessary register on Ironlake for shader_time to tell
us.

Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77703
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
(cherry picked from commit db42dd89527a42def720c3dd78a6e14402a1a2a2)
Revert "i965/fs: Change fs_visitor::emit_lrp to use MAC for gen<6"

This reverts commit a6860100b87415ab510d0d210cabfeeccebc9a0a.

Why this code didn't work in all circumstances is unknown and without a
working Ironlake simulator (which uses a different AUB format) we'll
probably never know, short of a lot of experimentation, and spending a
bunch of time to try to optimize a few instructions on Ironlake is not
time well spent.

Moreover, for mix(vec4, vec4, vec4) using the accumulator introduces a
dependence between the otherwise independent per-component calculations.
Not using the accumulator, even if it means an extra instruction per
component might be preferable. We don't know, we don't have data, and
we don't have the necessary register on Ironlake for shader_time to tell
us.

Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77707
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
(cherry picked from commit c2c639ecf667b4b7cf17cfe33dfe710432f2c43a)
glx: do not leak dri3Display

v2: Do not wrap the code in ifdef HAVE_DRI3 (suggested by Keith)

Cc: "10.1 10.2" <mesa-stable@lists.freedesktop.org>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
(cherry picked from commit eb2241f8a921a09db13bc453ce97b1f1939add17)
Revert "i965/fs: Reduce restrictions on interference in register coalescing."

This reverts commit f770123f58b46459e8dbd27525162ee8ba89f30b.

Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78692
(cherry picked from commit ccb1ea8a1502286124b48030dac9b898a6c7caaa)
Revert "i965/fs: Give up in interference check if we see a WHILE."

This reverts commit 55de1c035cbca2b7087b3aa21a8c3dfc900a4ad9.

Cc: "10.2" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit fc025a67198941ea105cb8a22272b4abf38b8616)
Revert "i965/fs: Simplify interference scan in register coalescing."

This reverts commit 5ff1e446d44bb9d50f84883c7058635cb070e069.

Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77704
(cherry picked from commit a39428cf5c973513c5189dec4af34ce1e1582d51)
Revert "i965: Don't make instructions with a null dest a barrier to scheduling."

This reverts commit 42a26cb5e441a01d5288b299980f23affaad53fe.

Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78648
(cherry picked from commit 0d3f83f4ad5f66a3ad62f1ec0cdc5029487e92f3)
meta/blit: Add stencil texturing mode save and restore

v2 (Ken): Only restore the mode if it has changed.

Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
(cherry picked from commit c246828c4d59025bf4e1d5d9de5d9bc5517b3a7b)
i965/meta: Store stencil texturing mode

Meta path needs to keep the current texture object's state. Fixes
the following gles3 cts tests on bdw:

framebuffer_blit_functionality_negative_width_blit.test: fail
framebuffer_blit_functionality_all_buffer_blit.test: fail
framebuffer_blit_functionality_negative_height_blit.test: fail
framebuffer_blit_functionality_missing_buffers_blit.test: fail
framebuffer_blit_functionality_negative_dimensions_blit.test: fail
framebuffer_blit_functionality_minifying_blit.test: fail
framebuffer_blit_functionality_magnifying_blit.test: fail

Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
(cherry picked from commit 57730d67f66f998e8417979b1569ad51f1a75c66)
meta/blit: Use gl_FragColor also in the msaa blit shader

Fixes framebuffer_blit_functionality_multisampled_to_singlesampled_blit
es3 cts test on bdw. Also fixes this on ivb when ivb is forced to use
the meta path.

No piglit regressions on IVB.

Further input from Ken:

 "Unfortunately, this doesn't fix MRT for integer data.

  In the single-sampled case, since we're directly copying data, we were
  read/copy/write data as "float" values, which actually contained the
  integer bits.  Here, we can't do that since we need to process the
  actual integer data.

  I do wonder if we could use intBitsToFloat/uintBitsToFloat to stuff the
  integer bits in the float gl_FragColor output.  Just a crazy idea.

  In the long term (post 10.2), I think we should draft an extension that
  allows you to do "layout(location = all)" on user-defined fragment
  shader outputs.  (Or some similar syntax.)"

Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Cc: "10.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
(cherry picked from commit a6022e5405a11ef24e3870ca86ffbbb52929ad4f)
i965: Fix repeated usage of rectangle texture coordinate scaling.

Previously, we set up new entries in the params[] array on every access
of a rectangle texture.  Unfortunately, we only reserve space for
(2 * MaxTextureImageUnits) extra entries, so programs which accessed
rectangle textures more times than that would write off the end of the
array and likely crash.

We don't really have a decent mapping between the index returned by
_mesa_add_state_reference and our index into the params array, so we
have to manually search for it.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78691
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Cc: mesa-stable@lists.freedesktop.org
(cherry picked from commit bb9623a1a8b1884817422752c8dced9f084d4547)
glsl: fix use-after free bug/crash in ast_declarator_list::hir()

The call to get_variable_being_redeclared() may delete 'var' so we
can't reference var->name afterward.  We fix that by examining the
var's name before making that call.

Fixes valgrind warnings and possible crash when running the piglit
tests/spec/glsl-1.30/execution/clipping/vs-clip-distance-in-param.shader_test
test (and probably others).

Cc: "10.1 10.2" <mesa-stable@lists.freedesktop.org>

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
(cherry picked from commit f9cecca7a6e3d9ff231075381b88d179e153a5a4)
glx: load dri driver with RTLD_LOCAL so dlclose never fails to unload

There is no reason anymore to load with RTLD_GLOBAL and for some driver
this even result in dlclose failing to unload leading to catastrophic
failure with swrast fallback.

Cc: "10.1 10.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
(cherry picked from commit e3cc0d90e14e62a0a787b6c07a6df0f5c84039be)