radeonsi: fix synchronization of shader images

This fixes the winsys->cs_is_buffer_referenced query, which is used for
synchronization before buffers are mapped.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

st/glsl_to_tgsi: fix potential crash when allocating temporaries

When index - t->temps_size is greater than 4096, allocating space for
temporaries on demand will miserably crash. This can happen when a game
uses a lot of temporaries like the recent released Tomb raider.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Cc: "11.1 11.2" <mesa-stable@lists.freedesktop.org>

glsl: Lower vector_extracts to swizzles after lower_vector_derefs.

lower_vector_derefs can produce new vector_extract operations.
Neither i965 nor st_glsl_to_tgsi can handle them, so we'd best
convert them to swizzles.

Together with the previous patch, this fixes assertion failures in
GLideN64, as well as a new Piglit test which reproduces the issue:
spec/glsl-1.10/compiler/vector-dereference-in-dereference.frag

Cc: mesa-stable@lists.freedesktop.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95164
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

glsl: Convert lower_vec_index_to_swizzle to a rvalue visitor.

The old visitor missed some cases.  For example, it wouldn't handle
an ir_dereference_array with a vector_extract as the index.

Rather than trying to add the missing cases, just rewrite it as an
ir_rvalue_visitor.  This makes it easy to replace any expression,
and is much less code.

Cc: mesa-stable@lists.freedesktop.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95164
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

mesa: simplify _mesa_Lightfv

Signed-off-by: Thomas Faller <tfaller1@gmx.de>
Reviewed-by: Brian Paul <brianp@vmware.com>

gallium/radeon: fix crash in r600_set_streamout_targets

Protect against dereferencing a gap in the targets array. This was triggered
by a test in the Khronos CTS.

Cc: "11.1 11.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

st/glsl_to_tgsi: reduce stack explosion in recursive expression visitor

In optimized builds, visit(ir_expression *) experiences inlining with gcc that
leads the function to have a roughly 32KB stack frame. This is a problem given
that the function is called recursively. In non-optimized builds, the stack
frame is much smaller, hence one gets crashes that happen only in optimized
builds.

Arguably there is a compiler bug or at least severe misfeature here. In any
case, the easy thing to do for now seems to be moving the bulk of the
non-recursive code into a separate function. This is sufficient to convince my
version of gcc not to blow up the stack frame of the recursive part. Just to be
sure, add the gcc-specific noinline attribute to prevent this bug from
reoccuring if inliner heuristics change.

v2: put ATTRIBUTE_NOINLINE into macros.h

Cc: "11.1 11.2" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95133
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95026
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92850
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robdclark@gmail.com>

tgsi/text: fix parsing of memory instructions

Properly handle Target and Format parameters when present.

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Dave Airlie <airlied@redhat.com>

tgsi/text: add str_match_name_from_array

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Dave Airlie <airlied@redhat.com>

tgsi/text: add str_match_format helper function

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Dave Airlie <airlied@redhat.com>

tgsi/build: pass Memory.Texture and .Format through tgsi_build_full_instruction

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Dave Airlie <airlied@redhat.com>

tgsi/dump: signal nospace when the last print exceeded the size

Previously, there was a bug where nospace wasn't signalled if it just so
happened that the very last print exceeded the available space.

Reviewed-by: Dave Airlie <airlied@redhat.com>

tgsi/dump: shared dump_ctx initialization

Reviewed-by: Dave Airlie <airlied@redhat.com>

st/omx: don't return early in vid_enc_EncodeFrame()

Earlier commit plugged a memory leak, although it missed a pair of
brackets. Thus we unconditionally returned even in the case of no error.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95203
Fixes: b87856d25d1 ("st/omx: Fix resource leak on OMX_ErrorNone")
Tested-by: Andy Furniss <adf.lists@gmail.com>
Acked-by: Robert Foss <robert.foss@collabora.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
---
What an embarassing bug - missing brackets. Andy can you confirm that it
resolves the issue ?

glsl: Checks for interpolation into its own function.

This generalizes the validation also to be done for variables inside
interface blocks, which, for some cases, was missing.

For a discussion about the additional validation cases included see
https://lists.freedesktop.org/archives/mesa-dev/2016-March/109117.html
and Khronos bug #15671.

Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Andres Gomez <agomez@igalia.com>

nir/algebraic: Support lowering for both 64 and 32-bit ldexp

Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>

nir/opcodes: Make ldexp take an explicitly 32-bit int

There is no sense in having the double version of ldexp take a 64-bit
integer.  Instead, let's just take a 32-bit int all the time.  This also
matches what GLSL does where both variants of ldexp take a regular integer
for the exponent argument.

Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>

nir/opcodes: Simplify the expressions for [un]pack_double

The new expressions are more explicit in terms of where the bits go so it's
a little easier to tell what's going on.  This is the way GLSL specifies
things so it's a bit easier to verify too.  It also has the benifit that
the new expressions easily vectorize so we can constant-fold vector forms
of the _split versions correctly.

Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>

mesa: Fix indirect draw buffer size check on 32-bit systems.

Fixes dEQP-GLES31.functional subtests:
draw_indirect.negative.command_offset_not_in_buffer_signed32_wrap
draw_indirect.negative.command_offset_not_in_buffer_unsigned32_wrap

These tests use really large values that overflow GLsizeiptr, at
which point the buffer size isn't less than "end".

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95138
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Reviewed-by: Mark Janes <mark.a.janes@intel.com>

nir: Switch the arguments to nir_foreach_def

This matches the "foreach x in container" pattern found in many other
programming languages.  Generated by the following regular expression:

s/nir_foreach_def(\([^,]*\),\s*\([^,]*\))/nir_foreach_def(\2, \1)/

Reviewed-by: Eduardo Lima Mitev <elima@igalia.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

nir: Switch the arguments to nir_foreach_use and friends

This matches the "foreach x in container" pattern found in many other
programming languages.  Generated by the following regular expression:

s/nir_foreach_use(\([^,]*\),\s*\([^,]*\))/nir_foreach_use(\2, \1)/

and similar expressions for nir_foreach_use_safe, etc.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

nir: Switch the arguments to nir_foreach_function

This matches the "foreach x in container" pattern found in many other
programming languages.  Generated by the following regular expression:

s/nir_foreach_function(\([^,]*\),\s*\([^,]*\))/nir_foreach_function(\2, \1)/

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

nir: Switch the arguments to nir_foreach_parallel_copy_entry

This matches the "foreach x in container" pattern found in many other
programming languages.

Reviewed-by: Eduardo Lima Mitev <elima@igalia.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

nir: Switch the arguments to nir_foreach_phi_src

This matches the "foreach x in container" pattern found in many other
programming languages.  Generated by the following regular expression:

s/nir_foreach_phi_src(\([^,]*\),\s*\([^,]*\))/nir_foreach_phi_src(\2, \1)/

and a similar expression for nir_foreach_phi_src_safe.

Reviewed-by: Eduardo Lima Mitev <elima@igalia.com>

nir: Switch the arguments to nir_foreach_instr

This matches the "foreach x in container" pattern found in many other
programming languages.  Generated by the following regular expression:

s/nir_foreach_instr(\([^,]*\),\s*\([^,]*\))/nir_foreach_instr(\2, \1)/

and similar expressions for nir_foreach_instr_safe etc.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

anv/lower_push_constants: fixup for nir_foreach_block()

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>

anv/apply_pipeline_layout: fixup for nir_foreach_block()

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>

anv/apply_dynamic_offsets: fixup for nir_foreach_block()

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>

i965/nir: fixup for new foreach_block()

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

nir/algebraic: fixup for new foreach_block()

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

nir/validate: fixup for new foreach_block()

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

nir/nir_worklist: fixup for new foreach_block()

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

nir/remove_dead_variables: fixup for new foreach_block()

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

nir/split_var_copies: fixup for new foreach_block()

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

nir/repair_ssa: fixup for new foreach_block()

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

nir/opt_peephole_select: fixup for new foreach_block()

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

nir/phi_builder: fixup for new foreach_block()

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

nir/opt_cp: fixup for new foreach_block()

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

nir/opt_remove_phis: fixup for new foreach_block()

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

nir/opt_undef: fixup for new foreach_block()

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

nir/opt_dead_cf: fixup for new foreach_block()

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

nir/opt_dce: fixup for new foreach_block()

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

nir/opt_gcm: fixup for new foreach_block()

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

nir/opt_constant_folding: fixup for new foreach_block()

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

nir/lower_samplers: fixup for new foreach_block()

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

nir/normalize_cubemap_coords: fixup for new foreach_block()

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

nir/lower_var_copies: fixup for new foreach_block()

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

nir/move_vec_src_uses_to_dest: fixup for new foreach_block()

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

nir/lower_vars_to_ssa: fixup for new foreach_block()

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

nir/lower_vec_to_movs: fixup for new foreach_block()

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

nir/lower_idiv: fixup for new foreach_block()

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

nir/lower_to_source_mods: fixup for new foreeach_block()

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

nir/lower_io: fixup for new foreach_block()

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

nir/lower_system_values: fixup for new foreach_block()

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

nir/lower_phis_to_scalar: fixup for new foreach_block()

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

nir/lower_indirect_derefs: fixup for new foreach_block()

v2 (Jason Ekstrand): Use nir_foreach_block_safe

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

nir/nir_lower_global_vars: fixup for new foreach_block()

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

nir/lower_atomics: fixup for new foreach_block()

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

nir/lower_load_const: fixup for new foreach_block()

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

nir/lower_locals_to_regs: fixup for new foreach_block()

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

nir/lower_gs_intrinsics: fixup for new foreach_block()

v2 (Jason Ekstrand): Use nir_foreach_block_safe

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

nir/nir: fixup for new foreach_block()

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

nir/lower_clip: fixup for new foreach_block()

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

nir/lower_alu_to_scalar: fixup for new foreach_block()

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

nir/liveness: fixup for new foreach_block()

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

nir/inline_functions: fixup for new foreach_block()

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

nir/from_ssa: fixup for new foreach_block()

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

nir/dominance: fixup for new foreach_block()

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

nvc0: stick compute kernel arguments into uniform_bo

Having one buffer object for input kernel arguments coming from clover
and an other one for OpenGL user uniforms is unnecessary. Using the
uniform_bo object for both GL/CL uniforms avoids to declare a new BO.

This only affects compute programs but it should not hurt anything
because the states are dirtied and data will get reuploaded.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

swr: remove duplicated constant update code

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

gallium/radeon: add the size only once in r600_context_add_resource_size

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

winsys/radeon: enlarge buffer_indices_hashlist

Enlarge the buffer hashlist to prevent large numbers of misses
due to adding more buffers than can be cached in the hashlist.

Ported from winsys/amdgpu: 6373845d985d65c00f7c62b793e67ae5106eabff

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

gallium/radeon: drop support for LINEAR_GENERAL layout

Unused. All texture imports use LINEAR_ALIGNED regardless of what
the DDX does.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

radeonsi: rework clear_buffer flags

Changes:
- don't flush DB for fast color clears
- don't flush any caches for initial clears
- remove the flag from si_copy_buffer, always assume shader coherency

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

anv/dynamic_offsets: Fix the order of arguments to nir_build_imm

anv: Fix a build error caused by recent fp64 NIR changes

nir: Try to warn when C99 extensions are used in nir headers.

Ideally we'd have nir.h being included with -Wpedantic too, but it fails
with:

src/compiler/nir/nir.h:754:20: warning: ISO C++ forbids zero-size array ‘src’ [-Wpedantic]
    nir_alu_src src[];
                    ^
In file included from src/compiler/nir/glsl_to_nir.cpp:42:0:
src/compiler/nir/nir.h:919:16: warning: ISO C++ forbids zero-size array ‘src’ [-Wpedantic]
    nir_src src[];

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

nir: Remove spurious ; after nir_builder functions.

Makes -pedantic happy.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

nir: Remove spurious ; after namespace.

Makes -pedantic happy.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

nir: Avoid C99 field initializers.

As they are not standard C++ and are not supported by MSVC C++ compiler.

Just have nir_imm_double match nir_imm_float above.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>

gallium/util: s/Elements/ARRAY_SIZE/

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

mesa: improve comment on _mesa_check_disallowed_mapping(), return bool

The old comment was a bit terse.  Also, change the function return
type to bool.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

radeonsi: remove needless cache flushes at the end of CP DMA operations

not needed AFAIK

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

radeonsi: remove flushes at the beginning and end of IBs done by the kernel

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

nir: Add lrp lowering for doubles in opt_algebraic

Some hardware (i965 on Broadwell generation, for example) does not support
natively the execution of lrp instruction with double arguments.

Add 'lower_flrp64' flag to lower this instruction in that case.

v2:
   - Rename lower_flrp_double to lower_flrp64 (Jason)
   - Fix typo (Jason)
   - Adapt the code to define bit_size information in the opcodes.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

nir: rename lower_flrp to lower_flrp32

A later patch will add lower_flrp64 option to NIR.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

nir/lower_double_ops: lower round_even()

At least i965 hardware does not have native support for round_even() on doubles.

Reviewed-by: Matt Turner <mattst88@gmail.com>

nir/lower_double_ops: lower fract()

At least i965 hardware does not have native support for fract() on doubles.

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

nir/lower_double_ops: lower ceil()

At least i965 hardware does not have native support for ceil on doubles.

v2 (Sam):
   - Improve the lowering pass to remove one bcsel (Jason).

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

nir/lower_double_ops: lower floor()

At least i965 hardware does not have native support for floor on doubles.

v2 (Sam):
  - Improve the lowering pass to remove one bcsel (Jason)

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

nir/lower_double_ops: lower trunc()

At least i965 hardware does not have native support for truncating doubles.

v2:
  - Simplified the implementation significantly.
  - Fixed the else branch, that was not doing what we wanted.

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

nir: add a pass to lower some double operations

v2: Move to compiler/nir (Iago)
v3: Use nir_imm_int() to load the constants (Sam)
v4 (Sam):
  - Undo line-wrap (Jason).
  - Fix comment (Jason).
  - Improve generated code for get_signed_inf() function (Connor).

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

nir/builder: add nir_imm_double()

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

nir/builder: Add bit_size info to nir_build_imm()

v2:
- Group num_components and bit_size together (Jason)

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

radeonsi: check if value is negative

Fixes a Coverity defect by adding checks to see if a value is negative
before using it to index an array. By checking the value first it makes
the code a bit safer but overall should not have a big impact.

CID: 1355598

Signed-off-by: Jakob Sinclair <sinclair.jakob@openmailbox.org>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>

clover: Fix build against clang SVN >= r267772

(Re-pushing previous fix for clang SVN r265359, which was reverted in
the meantime)

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

glsl: fix lowering outputs for early/nested returns

Return statements in conditional blocks were not having their
output varyings lowered correctly.

This patch fixes the following piglit tests:
/spec/glsl-1.10/execution/vs-float-main-return
/spec/glsl-1.10/execution/vs-vec2-main-return
/spec/glsl-1.10/execution/vs-vec3-main-return

Signed-off-by: Lars Hamre <chemecse@gmail.com>
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>

nir: rewrite nir_foreach_block and friends

Previously, these were functions which took a callback. This meant that
the per-block code had to be in a separate function, and all the data
that you wanted to pass in had to be a single void *. They walked the
control flow tree recursively, doing a depth-first search, and called
the callback in a preorder, matching the order of the original source
code. But since each node in the control flow tree has a pointer to its
parent, we can implement a "get-next" and "get-previous" method that
does the same thing that the recursive function did with no state at
all. This lets us rewrite nir_foreach_block() as a simple for loop,
which lets us greatly simplify its users in some cases. This does
require us to rewrite every user, although the transformation from the
old nir_foreach_block() to the new nir_foreach_block() is mostly
trivial.

One subtlety, though, is that the new nir_foreach_block() won't handle
the case where the current block is deleted, which the old one could.
There's a new nir_foreach_block_safe() which implements the standard
trick for solving this. Most users don't modify control flow, though, so
they won't need it. Right now, only opt_select_peephole needs it.

The old functions are reimplemented in terms of the new macros, although
they'll go away after everything is converted.

v2: keep an implementation of the old functions around
v3 (Jason Ekstrand): A small cosmetic change and a bugfix in the loop
   handling of nir_cf_node_cf_tree_last().
v4 (Jason Ekstrand): Use the _safe macro in foreach_block_reverse_call

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

nir/opt_cp: use nir_block_get_following_if()

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

vbo: Return INVALID_OPERATION during draw with a mapped buffer

Fixes the OpenGLES 3.1 CTS:
 * ESEXT-CTS.draw_elements_base_vertex_tests.invalid_mapped_bos

Because this is triggering the error message after the normal API
validation phase, we don't have the API function name available, and
therefore we generate an error message without the draw call name:

Mesa: User error: GL_INVALID_OPERATION in draw call (vertex buffers are mapped)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95142
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>