Support translation of DIModule (intel#1878)

This entity represents a module in the programming language, for example a Fortran module.
Spec:
KhronosGroup/SPIRV-Registry#186

The implementation is the same as for SPV_INTEL_debug_module extension. Spec for extension:
https://github.com/intel/llvm/blob/sycl/sycl/doc/design/spirv-extensions/SPV_INTEL_debug_module.asciidoc

Original commit:
KhronosGroup/SPIRV-LLVM-Translator@6a0368f

Author: vmaksimo

llvm-spirv/lib/SPIRV/LLVMToSPIRVDbgTran.cpp

@@ -360,7 +360,8 @@ SPIRVEntry *LLVMToSPIRVDbgTran::transDbgEntryImpl(const MDNode *MDN) {
       return transDbgImportedEntry(cast<DIImportedEntity>(DIEntry));
 
     case dwarf::DW_TAG_module: {
-      if (BM->isAllowedToUseExtension(ExtensionID::SPV_INTEL_debug_module))
+      if (BM->isAllowedToUseExtension(ExtensionID::SPV_INTEL_debug_module) ||
+          BM->getDebugInfoEIS() == SPIRVEIS_NonSemantic_Kernel_DebugInfo_100)
         return transDbgModule(cast<DIModule>(DIEntry));
       return getDebugInfoNone();
     }
@@ -1257,15 +1258,33 @@ LLVMToSPIRVDbgTran::transDbgImportedEntry(const DIImportedEntity *IE) {
 SPIRVEntry *LLVMToSPIRVDbgTran::transDbgModule(const DIModule *Module) {
   using namespace SPIRVDebug::Operand::ModuleINTEL;
   SPIRVWordVec Ops(OperandCount);
+  // The difference in translation of NonSemantic Debug Info and
+  // SPV_INTEL_debug_module extension is that extension allows Line and IsDecl
+  // operands to be Literals, when the non-OpenCL Debug Info allows only IDs to
+  // the constant values.
+  bool IsNonSemanticDI =
+      (BM->getDebugInfoEIS() == SPIRVEIS_NonSemantic_Kernel_DebugInfo_100);
   Ops[NameIdx] = BM->getString(Module->getName().str())->getId();
   Ops[SourceIdx] = getSource(Module->getFile())->getId();
-  Ops[LineIdx] = Module->getLineNo();
+  if (IsNonSemanticDI) {
+    ConstantInt *Line = getUInt(M, Module->getLineNo());
+    Ops[LineIdx] = SPIRVWriter->transValue(Line, nullptr)->getId();
+  } else {
+    Ops[LineIdx] = Module->getLineNo();
+  }
   Ops[ParentIdx] = getScope(Module->getScope())->getId();
   Ops[ConfigMacrosIdx] =
       BM->getString(Module->getConfigurationMacros().str())->getId();
   Ops[IncludePathIdx] = BM->getString(Module->getIncludePath().str())->getId();
   Ops[ApiNotesIdx] = BM->getString(Module->getAPINotesFile().str())->getId();
-  Ops[IsDeclIdx] = Module->getIsDecl();
+  if (IsNonSemanticDI) {
+    ConstantInt *IsDecl = getUInt(M, Module->getIsDecl());
+    Ops[IsDeclIdx] = SPIRVWriter->transValue(IsDecl, nullptr)->getId();
+  } else {
+    Ops[IsDeclIdx] = Module->getIsDecl();
+  }
+  if (IsNonSemanticDI)
+    return BM->addDebugInfo(SPIRVDebug::Module, getVoidTy(), Ops);
   BM->addExtension(ExtensionID::SPV_INTEL_debug_module);
   BM->addCapability(spv::CapabilityDebugInfoModuleINTEL);
   return BM->addDebugInfo(SPIRVDebug::ModuleINTEL, getVoidTy(), Ops);

llvm-spirv/lib/SPIRV/SPIRVToLLVMDbgTran.cpp

@@ -1000,14 +1000,22 @@ DINode *SPIRVToLLVMDbgTran::transModule(const SPIRVExtInst *DebugInst) {
   using namespace SPIRVDebug::Operand::ModuleINTEL;
   const SPIRVWordVec &Ops = DebugInst->getArguments();
   assert(Ops.size() >= OperandCount && "Invalid number of operands");
+  bool IsNonSemanticDI =
+      (DebugInst->getExtSetKind() == SPIRVEIS_NonSemantic_Kernel_DebugInfo_100);
   DIScope *Scope = getScope(BM->getEntry(Ops[ParentIdx]));
-  unsigned Line = Ops[LineIdx];
+  auto GetInt = [&](SPIRVId Id) -> ConstantInt * {
+    auto *V = BM->get<SPIRVValue>(Id);
+    return cast<ConstantInt>(SPIRVReader->transValue(V, nullptr, nullptr));
+  };
+  unsigned Line =
+      IsNonSemanticDI ? GetInt(Ops[LineIdx])->getZExtValue() : Ops[LineIdx];
   DIFile *File = getFile(Ops[SourceIdx]);
   StringRef Name = getString(Ops[NameIdx]);
   StringRef ConfigMacros = getString(Ops[ConfigMacrosIdx]);
   StringRef IncludePath = getString(Ops[IncludePathIdx]);
   StringRef ApiNotes = getString(Ops[ApiNotesIdx]);
-  bool IsDecl = Ops[IsDeclIdx];
+  bool IsDecl =
+      IsNonSemanticDI ? GetInt(Ops[IsDeclIdx])->getZExtValue() : Ops[IsDeclIdx];
 
   return Builder.createModule(Scope, Name, ConfigMacros, IncludePath, ApiNotes,
                               File, Line, IsDecl);
@@ -1115,6 +1123,7 @@ MDNode *SPIRVToLLVMDbgTran::transDebugInstImpl(const SPIRVExtInst *DebugInst) {
   case SPIRVDebug::ImportedEntity:
     return transImportedEntry(DebugInst);
 
+  case SPIRVDebug::Module:
   case SPIRVDebug::ModuleINTEL:
     return transModule(DebugInst);
 

llvm-spirv/lib/SPIRV/libSPIRV/SPIRV.debug.h

@@ -53,6 +53,7 @@ enum Instruction {
   ModuleINTEL                   = 36,
   InstCount                     = 37,
   TypeSubrange                  = 110,
+  Module                        = 200,
   TypeArrayDynamic              = 202,
   TypeString                    = 203
 };

llvm-spirv/lib/SPIRV/libSPIRV/SPIRVExtInst.h

@@ -257,6 +257,7 @@ template <> inline void SPIRVMap<SPIRVDebugExtOpKind, std::string>::init() {
   add(SPIRVDebug::InlinedAt, "DebugInlinedAt");
   add(SPIRVDebug::ImportedEntity, "DebugImportedEntity");
   add(SPIRVDebug::ModuleINTEL, "DebugModuleINTEL");
+  add(SPIRVDebug::Module, "DebugModule");
   add(SPIRVDebug::Expression, "DebugExpression");
   add(SPIRVDebug::Operation, "DebugOperation");
 }

llvm-spirv/test/DebugInfo/NonSemanticKernel100/DIModule.ll

@@ -0,0 +1,52 @@
+; ModuleID = '/Volumes/Data/apple-internal/llvm/tools/clang/test/Modules/debug-info-moduleimport.m'
+; RUN: llvm-as < %s -o %t.bc
+; RUN: llvm-spirv --spirv-debug-info-version=nonsemantic-kernel-100 %t.bc -o %t.spv
+; RUN: llvm-spirv -r -emit-opaque-pointers %t.spv -o - | llvm-dis -o %t.ll
+
+; RUN: llc -mtriple=x86_64-apple-macosx %t.ll -accel-tables=Dwarf -o %t -filetype=obj
+; RUN: llvm-dwarfdump -debug-info %t | FileCheck %s
+; RUN: llvm-dwarfdump -verify %t
+
+; RUN: llvm-spirv --spirv-debug-info-version=nonsemantic-kernel-100 %t.bc -spirv-text -o %t.spt
+; RUN: FileCheck %s --input-file %t.spt --check-prefix CHECK-SPIRV
+
+; CHECK: DW_TAG_compile_unit
+; CHECK-NOT: DW_TAG
+; CHECK:   DW_TAG_module
+; CHECK-NEXT: DW_AT_name {{.*}}"DebugModule"
+; CHECK-NEXT: DW_AT_LLVM_config_macros {{.*}}"-DMODULES=0"
+; CHECK-NEXT: DW_AT_LLVM_include_path {{.*}}"/llvm/tools/clang/test/Modules/Inputs"
+; CHECK-NEXT: DW_AT_LLVM_apinotes {{.*}}"m.apinotes"
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "spir64-unknown-unknown"
+
+; CHECK-SPIRV-DAG: ExtInstImport [[#EISId:]] "NonSemantic.Kernel.DebugInfo.100"
+; CHECK-SPIRV: String [[#FileName:]] "/llvm/tools/clang/test/Modules/<stdin>"
+; CHECK-SPIRV: String [[#EmptyStr:]] ""
+; CHECK-SPIRV: String [[#Name:]] "DebugModule"
+; CHECK-SPIRV: String [[#Defines:]] "-DMODULES=0"
+; CHECK-SPIRV: String [[#IncludePath:]] "/llvm/tools/clang/test/Modules/Inputs"
+; CHECK-SPIRV: String [[#ApiNotes:]] "m.apinotes"
+; CHECK-SPIRV: TypeInt [[#TypeInt32:]] 32 0
+; CHECK-SPIRV: Constant [[#TypeInt32]] [[#Constant0:]] 0
+
+; CHECK-SPIRV: ExtInst [[#]] [[#Source:]] [[#]] DebugSource [[#FileName]]
+; CHECK-SPIRV: ExtInst [[#]] [[#Parent:]] [[#]] DebugCompileUnit 65536 4
+; CHECK-SPIRV: ExtInst [[#]] [[#SourceEmpty:]] [[#]] DebugSource [[#EmptyStr]]
+; CHECK-SPIRV: ExtInst [[#]] [[#Module:]] [[#]] DebugModule [[#Name]] [[#SourceEmpty]] [[#Constant0]] [[#Parent]] [[#Defines]] [[#IncludePath]] [[#ApiNotes]] [[#Constant0]]
+; CHECK-SPIRV: ExtInst [[#]] [[#]] [[#]] DebugImportedEntity [[#]] [[#]] [[#]] [[#Source]] [[#Module]]
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!6, !7}
+!llvm.ident = !{!8}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_ObjC, file: !1, producer: "LLVM version 3.7.0", isOptimized: false, runtimeVersion: 2, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !3,  sysroot: "/")
+!1 = !DIFile(filename: "/llvm/tools/clang/test/Modules/<stdin>", directory: "/")
+!2 = !{}
+!3 = !{!4}
+!4 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !0, entity: !5, file: !1, line: 5)
+!5 = !DIModule(scope: null, name: "DebugModule", configMacros: "-DMODULES=0", includePath: "/llvm/tools/clang/test/Modules/Inputs", apinotes: "m.apinotes")
+!6 = !{i32 2, !"Dwarf Version", i32 4}
+!7 = !{i32 2, !"Debug Info Version", i32 3}
+!8 = !{!"LLVM version 3.7.0"}