amd: Add ac_shader_debug_info

This is very similar to nir_debug_info_instr but it can exist outside of
a nir shader.

Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29298>

src/amd/common/ac_shader_debug_info.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2024 Valve Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef AC_SHADER_DEBUG_INFO_H
+#define AC_SHADER_DEBUG_INFO_H
+
+#include "stdint.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum ac_shader_debug_info_type {
+   ac_shader_debug_info_src_loc,
+};
+
+/*
+ * ac_shader_debug_info holds information about a sequence of hardware instructions starting
+ * at ac_shader_debug_info::offset and ending at the offset of the next ac_shader_debug_info.
+ */
+struct ac_shader_debug_info {
+   enum ac_shader_debug_info_type type;
+
+   union {
+      struct {
+         /* Line number and spirv offset this instruction sequence was generated from. */
+         char *file;
+         uint32_t line;
+         uint32_t column;
+         uint32_t spirv_offset;
+      } src_loc;
+   };
+
+   /* Offset into the shader binary: */
+   uint32_t offset;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif