From 3211e4f52b787c106b0b194ce9c429570c0fa6c9 Mon Sep 17 00:00:00 2001
From: 0xzhang <aliceb0b@hotmail.com>
Date: Mon, 18 Oct 2021 11:11:14 +0800
Subject: [PATCH] [vulkan] Clear unnecessary GLSL shader files on Vulkan
 backend. (#3211)

---
 cmake/TaichiCore.cmake                        |  2 +-
 taichi/backends/vulkan/shaders/atomics.glsl.h | 44 -------------------
 taichi/backends/vulkan/shaders/epilogue.h     |  1 -
 taichi/backends/vulkan/shaders/prologue.h     | 28 ------------
 4 files changed, 1 insertion(+), 74 deletions(-)
 delete mode 100644 taichi/backends/vulkan/shaders/atomics.glsl.h
 delete mode 100644 taichi/backends/vulkan/shaders/epilogue.h
 delete mode 100644 taichi/backends/vulkan/shaders/prologue.h

diff --git a/cmake/TaichiCore.cmake b/cmake/TaichiCore.cmake
index 3d6e6d2a0ca6f..525fcee7f0c09 100644
--- a/cmake/TaichiCore.cmake
+++ b/cmake/TaichiCore.cmake
@@ -58,7 +58,7 @@ file(GLOB TAICHI_CUDA_SOURCE "taichi/backends/cuda/*.cpp" "taichi/backends/cuda/
 file(GLOB TAICHI_METAL_SOURCE "taichi/backends/metal/*.h" "taichi/backends/metal/*.cpp" "taichi/backends/metal/shaders/*")
 file(GLOB TAICHI_OPENGL_SOURCE "taichi/backends/opengl/*.h" "taichi/backends/opengl/*.cpp" "taichi/backends/opengl/shaders/*")
 file(GLOB TAICHI_CC_SOURCE "taichi/backends/cc/*.h" "taichi/backends/cc/*.cpp")
-file(GLOB TAICHI_VULKAN_SOURCE "taichi/backends/vulkan/*.h" "taichi/backends/vulkan/*.cpp" "taichi/backends/vulkan/shaders/*" "external/SPIRV-Reflect/spirv_reflect.c")
+file(GLOB TAICHI_VULKAN_SOURCE "taichi/backends/vulkan/*.h" "taichi/backends/vulkan/*.cpp" "external/SPIRV-Reflect/spirv_reflect.c")
 file(GLOB TAICHI_INTEROP_SOURCE "taichi/backends/interop/*.cpp" "taichi/backends/interop/*.h")
 
 
diff --git a/taichi/backends/vulkan/shaders/atomics.glsl.h b/taichi/backends/vulkan/shaders/atomics.glsl.h
deleted file mode 100644
index 1c183b6f4b30e..0000000000000
--- a/taichi/backends/vulkan/shaders/atomics.glsl.h
+++ /dev/null
@@ -1,44 +0,0 @@
-// clang-format on
-#include "taichi/backends/vulkan/shaders/prologue.h"
-
-#ifndef TI_INSIDE_VULKAN_CODEGEN
-static_assert(false, "do not include");
-#endif  // TI_INSIDE_VULKAN_CODEGEN
-
-#define VULKAN_BEGIN_CODE_DEF constexpr auto kVulkanAtomicsSourceCode =
-#define VULKAN_END_CODE_DEF ;
-
-// clang-format off
-VULKAN_BEGIN_CODE_DEF
-STR(
-// TODO: don't duplicate, pass in pointer
-float fatomicAdd_root_buffer(int addr, float data) {
-  int old_val = 0;
-  int new_val = 0;
-  int cas_val = 0;
-  int ok = 0;
-  while (ok == 0) {
-    old_val = root_buffer[addr];
-    new_val = floatBitsToInt(intBitsToFloat(old_val) + data);
-    cas_val = atomicCompSwap(root_buffer[addr], old_val, new_val);
-    ok = int(cas_val == old_val);
-  }
-  return intBitsToFloat(old_val);
-}
-
-float fatomicAdd_global_tmps_buffer(int addr, float data) {
-  int old_val = 0;
-  int new_val = 0;
-  int cas_val = 0;
-  int ok = 0;
-  while (ok == 0) {
-    old_val = global_tmps_buffer[addr];
-    new_val = floatBitsToInt(intBitsToFloat(old_val) + data);
-    cas_val = atomicCompSwap(global_tmps_buffer[addr], old_val, new_val);
-    ok = int(cas_val == old_val);
-  }
-  return intBitsToFloat(old_val);
-}
-)
-VULKAN_END_CODE_DEF
-// clang-format on
diff --git a/taichi/backends/vulkan/shaders/epilogue.h b/taichi/backends/vulkan/shaders/epilogue.h
deleted file mode 100644
index 8b137891791fe..0000000000000
--- a/taichi/backends/vulkan/shaders/epilogue.h
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/taichi/backends/vulkan/shaders/prologue.h b/taichi/backends/vulkan/shaders/prologue.h
deleted file mode 100644
index bbacdf2efc286..0000000000000
--- a/taichi/backends/vulkan/shaders/prologue.h
+++ /dev/null
@@ -1,28 +0,0 @@
-#ifdef TI_INSIDE_VULKAN_CODEGEN
-
-#include "taichi/util/macros.h"
-
-#else
-
-#define STR(...) __VA_ARGS__
-
-#define inout
-
-// GLSL builtin stubs
-int floatBitsToInt(float f) {
-  return *reinterpret_cast<int *>(&f);
-}
-
-int intBitsToFloat(float f) {
-  return *reinterpret_cast<int *>(&f);
-}
-
-int atomicCompSwap(int &mem, int compare, int data) {
-  const int old = mem;
-  if (mem == compare) {
-    mem = data;
-  }
-  return old;
-}
-
-#endif  // TI_INSIDE_VULKAN_CODEGEN