Move a bunch of the CLC stuff from src/microsoft to common code

The D3D12-specific stuff isn't useful to have in common code but all the
stuff to invoke clang really should be common.

v2: Rebase (Lionel)

v3: Define a new clc_libclc_new_dxil() entrypoint to create a clc
    context with DXIL nir_options (Jesse)

v4: Fixup meson build (Lionel)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9156>

src/compiler/clc/clc_helpers.h

@@ -0,0 +1,104 @@
+/*
+ * Copyright © Microsoft Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef MESA_CLC_HELPERS_H
+#define MESA_CLC_HELPERS_H
+
+#include "nir_types.h"
+
+#include "clc.h"
+#include "util/u_string.h"
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+bool
+clc_spirv_get_kernels_info(const struct clc_binary *spvbin,
+                           const struct clc_kernel_info **kernels,
+                           unsigned *num_kernels,
+                           const struct clc_parsed_spec_constant **spec_constants,
+                           unsigned *num_spec_constants,
+                           const struct clc_logger *logger);
+
+void
+clc_free_kernels_info(const struct clc_kernel_info *kernels,
+                      unsigned num_kernels);
+
+int
+clc_c_to_spir(const struct clc_compile_args *args,
+              const struct clc_logger *logger,
+              struct clc_binary *out_spir);
+
+int
+clc_spir_to_spirv(const struct clc_binary *in_spir,
+                  const struct clc_logger *logger,
+                  struct clc_binary *out_spirv);
+
+int
+clc_c_to_spirv(const struct clc_compile_args *args,
+               const struct clc_logger *logger,
+               struct clc_binary *out_spirv);
+
+int
+clc_link_spirv_binaries(const struct clc_linker_args *args,
+                        const struct clc_logger *logger,
+                        struct clc_binary *out_spirv);
+
+int
+clc_spirv_specialize(const struct clc_binary *in_spirv,
+                     const struct clc_parsed_spirv *parsed_data,
+                     const struct clc_spirv_specialization_consts *consts,
+                     struct clc_binary *out_spirv);
+
+void
+clc_dump_spirv(const struct clc_binary *spvbin, FILE *f);
+
+void
+clc_free_spir_binary(struct clc_binary *spir);
+
+void
+clc_free_spirv_binary(struct clc_binary *spvbin);
+
+#define clc_log(logger, level, fmt, ...) do {        \
+      if (!logger || !logger->level) break;          \
+      char *_msg = NULL;                             \
+      asprintf(&_msg, fmt, ##__VA_ARGS__);           \
+      assert(_msg);                                  \
+      logger->level(logger->priv, _msg);             \
+      free(_msg);                                    \
+   } while (0)
+
+#define clc_error(logger, fmt, ...) clc_log(logger, error, fmt, ##__VA_ARGS__)
+#define clc_warning(logger, fmt, ...) clc_log(logger, warning, fmt, ##__VA_ARGS__)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MESA_CLC_HELPERS_H */