[llvm] [SPIR-V] Support extension toggling and enabling all (PR #85503)

[Arvind Sudarsanam via llvm-commits]

================
@@ -0,0 +1,92 @@
+//===--- SPIRVCommandLine.cpp ---- Command Line Options ---------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains definitions of classes and functions needed for
+// processing, parsing, and using CLI options for the SPIR-V backend.
+//
+//===----------------------------------------------------------------------===//
+
+#include "SPIRVCommandLine.h"
+#include "llvm/ADT/StringRef.h"
+#include <map>
+
+#define DEBUG_TYPE "spirv-commandline"
+
+using namespace llvm;
+
+const std::map<std::string, SPIRV::Extension::Extension> ExtensionMap = {
+    {"SPV_EXT_shader_atomic_float_add",
+     SPIRV::Extension::Extension::SPV_EXT_shader_atomic_float_add},
+    {"SPV_EXT_shader_atomic_float16_add",
+     SPIRV::Extension::Extension::SPV_EXT_shader_atomic_float16_add},
+    {"SPV_EXT_shader_atomic_float_min_max",
+     SPIRV::Extension::Extension::SPV_EXT_shader_atomic_float_min_max},
+    {"SPV_INTEL_arbitrary_precision_integers",
+     SPIRV::Extension::Extension::SPV_INTEL_arbitrary_precision_integers},
+    {"SPV_INTEL_optnone", SPIRV::Extension::Extension::SPV_INTEL_optnone},
+    {"SPV_INTEL_usm_storage_classes",
+     SPIRV::Extension::Extension::SPV_INTEL_usm_storage_classes},
+    {"SPV_INTEL_subgroups", SPIRV::Extension::Extension::SPV_INTEL_subgroups},
+    {"SPV_KHR_uniform_group_instructions",
+     SPIRV::Extension::Extension::SPV_KHR_uniform_group_instructions},
+    {"SPV_KHR_no_integer_wrap_decoration",
+     SPIRV::Extension::Extension::SPV_KHR_no_integer_wrap_decoration},
+    {"SPV_KHR_float_controls",
+     SPIRV::Extension::Extension::SPV_KHR_float_controls},
+    {"SPV_KHR_expect_assume",
+     SPIRV::Extension::Extension::SPV_KHR_expect_assume},
+    {"SPV_KHR_bit_instructions",
+     SPIRV::Extension::Extension::SPV_KHR_bit_instructions},
+    {"SPV_KHR_linkonce_odr", SPIRV::Extension::Extension::SPV_KHR_linkonce_odr},
+    {"SPV_INTEL_bfloat16_conversion",
+     SPIRV::Extension::Extension::SPV_INTEL_bfloat16_conversion},
+    {"SPV_KHR_subgroup_rotate",
+     SPIRV::Extension::Extension::SPV_KHR_subgroup_rotate},
+    {"SPV_INTEL_variable_length_array",
+     SPIRV::Extension::Extension::SPV_INTEL_variable_length_array},
+    {"SPV_INTEL_function_pointers",
+     SPIRV::Extension::Extension::SPV_INTEL_function_pointers},
+};
+
+bool SPIRVExtensionsParser::parse(cl::Option &O, llvm::StringRef ArgName,
+                                  llvm::StringRef ArgValue,
+                                  std::set<SPIRV::Extension::Extension> &Val) {
----------------
asudarsa wrote:

```suggestion
                                  std::set<SPIRV::Extension::Extension> &Vals) {
```
Please change other locations as well.

https://github.com/llvm/llvm-project/pull/85503