[NFC] Add GitHub issues to HLSL FIXME comments

In order to make this easier to track I've filed issues for each of the
HLSL FIXME comments that I can find. I may have missed some, but I want
this to be the new default mode.

clang/lib/CodeGen/CGHLSLRuntime.cpp

@@ -143,6 +143,7 @@ void CGHLSLRuntime::emitEntryFunction(const FunctionDecl *FD,
   IRBuilder<> B(BB);
   llvm::SmallVector<Value *> Args;
   // FIXME: support struct parameters where semantics are on members.
+  // See: https://github.com/llvm/llvm-project/issues/57874
   for (const auto *Param : FD->parameters()) {
     Args.push_back(emitInputSemantic(B, *Param));
   }
@@ -150,6 +151,7 @@ void CGHLSLRuntime::emitEntryFunction(const FunctionDecl *FD,
   CallInst *CI = B.CreateCall(FunctionCallee(Fn), Args);
   (void)CI;
   // FIXME: Handle codegen for return type semantics.
+  // See: https://github.com/llvm/llvm-project/issues/57875
   B.CreateRetVoid();
 }
 

clang/lib/Driver/ToolChains/HLSL.cpp

@@ -209,5 +209,6 @@ HLSLToolChain::TranslateArgs(const DerivedArgList &Args, StringRef BoundArch,
   }
   // FIXME: add validation for enable_16bit_types should be after HLSL 2018 and
   // shader model 6.2.
+  // See: https://github.com/llvm/llvm-project/issues/57876
   return DAL;
 }

clang/lib/Sema/SemaDecl.cpp

@@ -11896,6 +11896,7 @@ void Sema::CheckHLSLEntryPoint(FunctionDecl *FD) {
   for (const auto *Param : FD->parameters()) {
     if (!Param->hasAttr<HLSLAnnotationAttr>()) {
       // FIXME: Handle struct parameters where annotations are on struct fields.
+      // See: https://github.com/llvm/llvm-project/issues/57875
       Diag(FD->getLocation(), diag::err_hlsl_missing_semantic_annotation);
       Diag(Param->getLocation(), diag::note_previous_decl) << Param;
       FD->setInvalidDecl();

clang/test/CodeGenHLSL/validator_version.hlsl

@@ -1,6 +1,7 @@
 // RUN: %clang -cc1 -S -triple dxil-pc-shadermodel6.3-library -S -emit-llvm -xhlsl -validator-version 1.1 -o - %s | FileCheck %s
 
 // FIXME:The following line should work once SPIR-V support for HLSL is added.
+// See: https://github.com/llvm/llvm-project/issues/57877
 // DISABLED: %clang -cc1 -S -triple spirv32 -S -emit-llvm -xhlsl -validator-version 1.1 -o - %s | FileCheck %s --check-prefix=NOT_DXIL
 
 // CHECK:!dx.valver = !{![[valver:[0-9]+]]}