meson: Check for SPIRV-Tools and llvm-spirv

Changes since:
* v12 (Karol Herbst):
  - rename CLOVER_ALLOW_SPIRV to HAVE_CLOVER_SPIRV
* v11 (Karol Herbst):
  - only set new defines for clover to speed up recompilation
  - remove autotools
* v10:
  - Add a new flag (`--enable-opencl-spirv` for autotools, and
    `-Dopencl-spirv=true` for meson) for enabling SPIR-V support in
    clover, and never automagically enable it without that flag. (Dylan Baker)
  - When enabling the SPIR-V support, the SPIRV-Tools and
    SPIRV-LLVM-Translator libraries are now required dependencies.
* v7:
  - Properly align LLVMSPIRVLib comment (Dylan Baker)
  - Only define CLOVER_ALLOW_SPIRV when **both** dependencies are found:
    autotools was only requiring one or the other.
* v6: Replace the llvm-spirv repository by the new official
      SPIRV-LLVM-Translator.
* v4: Add a comment saying where to find llvm-spirv (Karol Herbst).
* v3:
  - make SPIRV-Tools and llvm-spirv optional (Francisco Jerez);
  - bump requirement for llvm-spirv to version 0.2
* v2:
  - Bump the required version of SPIRV-Tools to the latest release;
  - Add a dependency on llvm-spirv.

Reviewed-by: Dylan Baker <dylan@pnwbakers.com> (v10)
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>

3 files changed, 26 insertions, 2 deletions

diff --git a/meson.build b/meson.build
index a50f57991da..5509a67fdeb 100644
--- a/meson.build
+++ b/meson.build
@@ -712,6 +712,16 @@ if _opencl != 'disabled'
   with_gallium_opencl = true
   with_opencl_icd = _opencl == 'icd'
 
+  with_opencl_spirv = get_option('opencl-spirv')
+  if with_opencl_spirv
+    dep_spirv_tools = dependency('SPIRV-Tools', required : true, version : '>= 2018.0')
+    # LLVMSPIRVLib is available at https://github.com/KhronosGroup/SPIRV-LLVM-Translator
+    dep_llvmspirvlib = dependency('LLVMSPIRVLib', required : true, version : '>= 0.2.1')
+  else
+    dep_spirv_tools = null_dep
+    dep_llvmspirvlib = null_dep
+  endif
+
   if host_machine.cpu_family().startswith('ppc') and cpp.compiles('''
       #if !defined(__VEC__) || !defined(__ALTIVEC__)
       #error "AltiVec not enabled"
@@ -721,8 +731,11 @@ if _opencl != 'disabled'
   endif
 else
   dep_clc = null_dep
+  dep_spirv_tools = null_dep
+  dep_llvmspirvlib = null_dep
   with_gallium_opencl = false
   with_opencl_icd = false
+  with_opencl_spirv = false
 endif
 
 gl_pkgconfig_c_flags = []
diff --git a/meson_options.txt b/meson_options.txt
index a2f86be19ae..3ab2900f929 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -144,6 +144,12 @@ option(
   description : 'build gallium "clover" OpenCL state tracker.',
 )
 option(
+  'opencl-spirv',
+  type : 'boolean',
+  value : false,
+  description : 'build gallium "clover" OpenCL state tracker with SPIR-V binary support.',
+)
+option(
   'd3d-drivers-path',
   type : 'string',
   value : '',
diff --git a/src/gallium/state_trackers/clover/meson.build b/src/gallium/state_trackers/clover/meson.build
index 2ff060bf35b..9e3ec8d5ad4 100644
--- a/src/gallium/state_trackers/clover/meson.build
+++ b/src/gallium/state_trackers/clover/meson.build
@@ -19,12 +19,17 @@
 # SOFTWARE.
 
 clover_cpp_args = []
+clover_spirv_cpp_args = []
 clover_incs = [inc_include, inc_src, inc_gallium, inc_gallium_aux]
 
 if with_opencl_icd
   clover_cpp_args += '-DHAVE_CLOVER_ICD'
 endif
 
+if with_opencl_spirv
+  clover_spirv_cpp_args += '-DHAVE_CLOVER_SPIRV'
+endif
+
 libclllvm = static_library(
   'clllvm',
   files(
@@ -40,7 +45,7 @@ libclllvm = static_library(
   ),
   include_directories : clover_incs,
   cpp_args : [
-    cpp_vis_args,
+    clover_spirv_cpp_args, cpp_vis_args,
     '-DLIBCLC_INCLUDEDIR="@0@/"'.format(dep_clc.get_pkgconfig_variable('includedir')),
     '-DLIBCLC_LIBEXECDIR="@0@/"'.format(dep_clc.get_pkgconfig_variable('libexecdir')),
     '-DCLANG_RESOURCE_DIR="@0@"'.format(join_paths(
@@ -111,7 +116,7 @@ libclover = static_library(
   'clover',
   [clover_files, sha1_h],
   include_directories : clover_incs,
-  cpp_args : [clover_cpp_args, cpp_vis_args],
+  cpp_args : [clover_spirv_cpp_args, clover_cpp_args, cpp_vis_args],
   link_with : [libclllvm],
   override_options : clover_cpp_std,
 )