Disable SPIR-V extensions except ones needed by chipStar

clang/lib/Driver/ToolChains/HIPSPV.cpp

@@ -99,8 +99,18 @@ void HIPSPV::Linker::constructLinkAndEmitSpirvCommand(
  // We need 1.2 when using warp-level primitivies via sub group extensions.
  // Strictly put we'd need 1.3 for the standard non-extension shuffle
  // operations, but it's not supported by any target yet.
- llvm::opt::ArgStringList TrArgs{"--spirv-max-version=1.2",
- "--spirv-ext=+all"};
+ llvm::opt::ArgStringList TrArgs{
+ "--spirv-max-version=1.2",
+ "--spirv-ext=-all"
+
+ // TODO: Consider upstreaming -Xspirv-translator found in intel-llvm
+ // repository and make it work for SPIR-V toolchains so chipStar may
+ // control extensions it needs (if/when necessary).
+
+ // Needed for experimental indirect call support.
+ ",+SPV_INTEL_function_pointers"
+ // Needed for shuffles below SPIR-V 1.3
+ ",+SPV_INTEL_subgroups"};
  InputInfo TrInput = InputInfo(types::TY_LLVM_BC, TempFile, "");
  SPIRV::constructTranslateCommand(C, *this, JA, Output, TrInput, TrArgs);
 }