ilo: 3DSTATE_INDEX_BUFFER may be wrongly skipped

In finalize_index_buffer(), when the current index buffer was destroyed due to
u_upload_data(), it may happen that the new index buffer is at the same
address as the old one.  Comparing the pointers to the two buffers could fail
to work, and 3DSTATE_INDEX_BUFFER would be incorrectly skipped.

Holding a reference to the current index buffer before calling u_upload_data()
should fix the problem.
ilo: initialize constant buffer SURFACE_STATE early

Fix ilo_gpe_init_view_surface_for_buffer to allow buffer to be NULL, and add
ilo_gpe_set_view_surface_bo to set it later.  This allows us to set up
SURFACE_STATE early for constant buffers backed by user buffers.
i965/fs: Log a performance warning if skipping 16-wide due to pulls.

Usually, the driver creates both 8-wide and 16-wide variants of every
fragment shader.  When 16-wide compilation fails, it logs a performance
warning explaining why only an 8-wide program exists.

However, when there are pull parameters, the driver won't even bother
trying the 16-wide compile (since it would fail).  In this case, it
failed to emit a performance warning, leaving no explanation for the
missing 16-wide program.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965/fs: Explicitly disallow CSE on predicated instructions.

The existing inst->is_partial_write() already disallows predicated
instructions, so this has no functional change.  However, it's worth
doing explicitly since the CSE pass does not consider the flag register.
This means it could blindly factor out operations that use the same
sources, but which have different condition codes set.

This prevents a regression in the next commit.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965/fs: Consider predicated SEL instructions as whole variable writes.

The instruction

   (+f0.0) SEL dst, src0, src1

will write either src0 or src1 to dst, depending on the predicate.
Unlike most predicated instructions, it always writes to dst.

fs_inst::is_partial_write() is supposed to return true if the whole
register is guaranteed to be written.  The !inst->predicated check makes
sense for most instructions, which might not write the whole register,
but SEL is a special case.

This caused live interval analysis to ignore the destination of
predicated SEL instructions when computing "def" information.

Requires the previous commit to avoid regressions.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965/fs: Optimize IF/MOV/ELSE/MOV/ENDIF to SEL when possible.

Many GLSL shaders contain code of the form:

   x = condition ? foo : bar

The compiler emits an ir_if tree for this, since each subexpression
might be a complex tree that could have side-effects and short-circuit
logic operations.

However, the common case is to simply pick one of two constants or
variable's values---which is exactly what SEL is for.  Replacing IF/ELSE
with SEL also simplifies the control flow graph, making optimization
passes which work on basic blocks more effective.

The shader-db statistics:

   total instructions in shared programs: 1655247 -> 1503234 (-9.18%)
   instructions in affected programs:     949188 -> 797175 (-16.02%)

   2,970 shaders were helped, none hurt.  Gained 181 SIMD16 programs.

This helps Valve's Source Engine games (max -41.33%), The Cave
(max -33.33%), Serious Sam 3 (max -18.64%), Yo Frankie! (max -30.19%),
Zen Bound (max -22.22%), GStreamer (max -6.12%), and GLBenchmark 2.7
(max -1.94%).

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965/fs: Remove extraneous newline in dump_instruction() for CMP.

This resulted in printouts like:

   246: cmp.cmod.f0.0
    ???, vgrf152, 0.000000f, (null),

With this patch, CMP is properly printed on one line.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965/fs: Add dump_instruction() support for ARF destinations.

CMP instructions use BRW_ARF_NULL as a destination.  Prior to this
patch, dump_instruction() decoded the destination as "???".

Now it decodes BRW_ARF_NULL as "(null)" and other ARFs numerically.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
gallivm: (trivial) fix typo in argument declaration of lp_build_size_query_soa

Was meant to match the name used elsewhere, spotted by Anthony.
draw: (trivial) dump tgsi for geometry shaders with GALLIVM_DEBUG_TGSI

And dump the variant key too (same as vs does).
Just so I can stop wondering why I see the tgsi dump for fs and vs but not
gs...
gallivm: simplify geometry shader mask handling a bit

Instead of reducing masks to 0/1 simply use the mask directly as -1.
Also use some signed comparison instead of unsigned (as far as I understand
these values have to be (very) small and signed means llvm doesn't have to
apply additional logic to do the unsigned comparisons the cpu can't do).
Saves a couple of instructions in some test geometry shader here.

v2: that was a bit to much optimization, don't skip combining the masks...

Reviewed-by: Zack Rusin <zackr@vmware.com>
draw: simplify prim mask construction

The code was quite weird, the second comparison was in fact a complete no-op
and we can also do the comparison with the vector directly instead of scalar,
which should not also be faster but it is way more obvious how that mask
is actually going to look like.

Reviewed-by: Zack Rusin <zackr@vmware.com>
gallivm: fix exec_mask interaction with geometry shader after end of main

Because we must maintain an exec_mask even if there's currently nothing
on the mask stack, we can still have an exec_mask at the end of the program.
Effectively, this mask should be set back to default when returning from main.
Without relying on END/RET opcode (I think it's valid to have neither) it is
actually difficult to do this, as there doesn't seem any reasonable place to
do it, so instead let's just say the exec_mask is invalid outside main (which
it really is effectively).
The problem is that geometry shader called end_primitive outside the shader
(in the epilogue), and as a result used a bogus mask, leading to bugs if we
had to set the (somewhat misnamed) ret_in_main bit anywhere. So just avoid
the mask combining function when called from outside the shader.

Reviewed-by: Zack Rusin <zackr@vmware.com>
gbm: Link to libwayland-drm if Wayland EGL platform is enabled

We were relying on libEGL to pull in libwayland-client symbols, but with
commit 2c2e64edaba0f6aeb181ca5b51eb8dea8e9b39f9 cleaned up the
symbol leak.

https://bugs.freedesktop.org/show_bug.cgi?id=67962
Revert "ilo: initialize constant buffer SURFACE_STATE early"

This reverts commit a9b800aa81cffdcaef2490ff49986099feae2663.  With push
constant support, the constructed SURFACE_STATE is unused and wasted.  The
change only slows things down.
ilo: make constant buffer 0 upload optional

Add ILO_KERNEL_SKIP_CBUF0_UPLOAD so that we can skip constant buffer 0 upload
when the kernel does not need it.
ilo: support copying constant buffer 0 to PCB

Add ILO_KERNEL_PCB_CBUF0_SIZE so that a kernel can specify how many bytes of
constant buffer 0 need to be copied to PCB.
ilo: support push constant model in shaders

Source constants from URB constant data when the constant data can fit in the
PCB.
ilo: no binding table change when constants are pushed

When constants can be pushed, and nothing else requires new SURFACE_STATEs,
there is no need to emit BINDING_TABLE_STATE.
ilo: enable dumping of WM PCB

It was disabled because it wasn't supported.