From e2b0d0952253846a2f83c72c288524263fc5be70 Mon Sep 17 00:00:00 2001
From: lucasz93 <turbo_sgtls@hotmail.com>
Date: Wed, 8 May 2024 12:32:11 +1000
Subject: [PATCH] Add parsing of OpenCL C++ -cl-std flags (#510)

Hello!

Support for OpenCL C++ was added into LLVM 14, but IGC doesn't support
parsing of those flags just yet. I've opened PRs which adds support for
parsing these flags to the following repositories:
[intel-graphics-compiler](https://github.com/intel/intel-graphics-compiler/pull/328),
[compute-runtime](https://github.com/intel/compute-runtime/pull/731) and
[opencl-clang](https://github.com/intel/opencl-clang/pull/510).

The options are passed down into LLVM which then happily compiles my C++
kernel.

PRs should be merged in the following order: opencl-clang,
intel-graphics-compiler, then finally compute-runtime.

Kind regards,
-Lucas

Co-authored-by: Lucas Zadrozny <lucas.zadrozny@hotmail.com>
(cherry picked from commit 545a14577cbeb3cee371afed22fea71c2025e724)
---
 opencl_clang_options.td |  3 +++
 options_compile.cpp     | 16 +++++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/opencl_clang_options.td b/opencl_clang_options.td
index 42cfb7c3..7c19e36e 100644
--- a/opencl_clang_options.td
+++ b/opencl_clang_options.td
@@ -33,6 +33,9 @@ def cl_std_CL1_1: Flag<["-"], "cl-std=CL1.1">;
 def cl_std_CL1_2: Flag<["-"], "cl-std=CL1.2">;
 def cl_std_CL2_0: Flag<["-"], "cl-std=CL2.0">;
 def cl_std_CL3_0: Flag<["-"], "cl-std=CL3.0">;
+def cl_std_CLCxx: Flag<["-"], "cl-std=CLC++">;
+def cl_std_CLCxx1_0: Flag<["-"], "cl-std=CLC++1.0">;
+def cl_std_CLCxx2021: Flag<["-"], "cl-std=CLC++2021">;
 def cl_uniform_work_group_size: Flag<["-"], "cl-uniform-work-group-size">;
 def cl_no_subgroup_ifp: Flag<["-"], "cl-no-subgroup-ifp">;
 def triple : Separate<["-"], "triple">,  HelpText<"Specify target triple (e.g. i686-apple-darwin9)">;
diff --git a/options_compile.cpp b/options_compile.cpp
index db48db1c..25cb1d66 100644
--- a/options_compile.cpp
+++ b/options_compile.cpp
@@ -67,6 +67,7 @@ std::string EffectiveOptionsFilter::processOptions(const OpenCLArgList &args,
                                                    ArgsVector &effectiveArgs) {
   // Reset args
   int iCLStdSet = 0;
+  bool isCpp = false;
   bool fp64Enabled = false;
   std::string szTriple;
   std::string sourceName(llvm::Twine(s_progID++).str());
@@ -135,6 +136,17 @@ std::string EffectiveOptionsFilter::processOptions(const OpenCLArgList &args,
       iCLStdSet = 300;
       effectiveArgs.push_back((*it)->getAsString(args));
       break;
+    case OPT_COMPILE_cl_std_CLCxx:
+    case OPT_COMPILE_cl_std_CLCxx1_0:
+      iCLStdSet = 200;
+      isCpp = true;
+      effectiveArgs.push_back((*it)->getAsString(args));
+      break;
+    case OPT_COMPILE_cl_std_CLCxx2021:
+      iCLStdSet = 300;
+      isCpp = true;
+      effectiveArgs.push_back((*it)->getAsString(args));
+      break;
     case OPT_COMPILE_triple:
       szTriple = (*it)->getValue();
       break;
@@ -212,7 +224,9 @@ std::string EffectiveOptionsFilter::processOptions(const OpenCLArgList &args,
 
   // Specifying the option makes clang emit function body for functions
   // marked with inline keyword.
-  effectiveArgs.push_back("-fgnu89-inline");
+  if (!isCpp) {
+    effectiveArgs.push_back("-fgnu89-inline");
+  }
 
   // Do not support all extensions by default. Support for a particular
   // extension should be enabled by passing a '-cl-ext' option in pszOptionsEx.