[refactor] Let LaunchContextBuilder be the argument of the compiled k…

…ernel function on host

ghstack-source-id: b0449c66699cf667699fab8a1dba603b1b3caf99
Pull Request resolved: #7550

taichi/inc/data_type_with_c_type.inc.h

@@ -0,0 +1,11 @@
+// Doesn't contain f16 and u1.
+PER_C_TYPE(f32, float32)
+PER_C_TYPE(f64, float64)
+PER_C_TYPE(i8, int8)
+PER_C_TYPE(i16, int16)
+PER_C_TYPE(i32, int32)
+PER_C_TYPE(i64, int64)
+PER_C_TYPE(u8, uint8)
+PER_C_TYPE(u16, uint16)
+PER_C_TYPE(u32, uint32)
+PER_C_TYPE(u64, uint64)

taichi/program/launch_context_builder.cpp

@@ -145,6 +145,23 @@ void LaunchContextBuilder::set_extra_arg_int(int i, int j, int32 d) {
   ctx_->extra_args[i][j] = d;
 }
 
+template <typename T>
+void LaunchContextBuilder::set_struct_arg(std::vector<int> index, T v) {
+  if (ctx_->arg_buffer_size == 0) {
+    // Currently arg_buffer_size is always zero on non-LLVM-based backends,
+    // and this function is no-op for these backends.
+    return;
+  }
+  int offset = ctx_->args_type->get_element_offset(index);
+  *(T *)(ctx_->arg_buffer + offset) = v;
+}
+
+#define PER_C_TYPE(x, ctype)                                 \
+  template void LaunchContextBuilder::set_struct_arg<ctype>( \
+      std::vector<int> index, ctype v);
+#include "taichi/inc/data_type_with_c_type.inc.h"
+#undef PER_C_TYPE
+
 void LaunchContextBuilder::set_arg_external_array_with_shape(
     int arg_id,
     uintptr_t ptr,

taichi/program/launch_context_builder.h

@@ -23,6 +23,14 @@ class LaunchContextBuilder {
 
   void set_arg(int arg_id, TypedConstant d);
 
+  template <typename T>
+  void set_arg_u8(int arg_id, T d) {
+    auto dt = kernel_->parameter_list[arg_id].get_dtype();
+    TI_ASSERT(dt->is_primitive(PrimitiveTypeID::u8));
+  }
+  template <typename T>
+  void set_struct_arg(std::vector<int> index, T v);
+
   void set_extra_arg_int(int i, int j, int32 d);
 
   void set_arg_external_array_with_shape(int arg_id,