[Clang][Flang][OpenMP] Add loadOffloadInfoMetadata and createOffloadEntriesAndInfoMetadata into OMPIRBuilder's finalize and initialize

This allows the generation of OpenMP offload metadata for the OpenMP
dialect when lowering to LLVM-IR and moves some of the shared logic
between the OpenMP Dialect and Clang into the IRBuilder.

Reviewers: jsjodin, jdoerfert, kiranchandramohan

Differential Revision: https://reviews.llvm.org/D148370

1 files changed, 8 insertions, 4 deletions

diff --git a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
index 70171e77eab9..864095fa3464 100644
--- a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
@@ -1274,19 +1274,23 @@ SmallVector<llvm::Value *> ModuleTranslation::lookupValues(ValueRange values) {
 llvm::OpenMPIRBuilder *ModuleTranslation::getOpenMPBuilder() {
   if (!ompBuilder) {
     ompBuilder = std::make_unique<llvm::OpenMPIRBuilder>(*llvmModule);
-    ompBuilder->initialize();
 
     bool isDevice = false;
+    llvm::StringRef hostIRFilePath = "";
     if (auto offloadMod =
-            dyn_cast<mlir::omp::OffloadModuleInterface>(mlirModule))
+            dyn_cast<mlir::omp::OffloadModuleInterface>(mlirModule)) {
       isDevice = offloadMod.getIsDevice();
+      hostIRFilePath = offloadMod.getHostIRFilePath();
+    }
+
+    ompBuilder->initialize(hostIRFilePath);
 
     // TODO: set the flags when available
-    llvm::OpenMPIRBuilderConfig Config(
+    llvm::OpenMPIRBuilderConfig config(
         isDevice, /* IsTargetCodegen */ false,
         /* HasRequiresUnifiedSharedMemory */ false,
         /* OpenMPOffloadMandatory */ false);
-    ompBuilder->setConfig(Config);
+    ompBuilder->setConfig(config);
   }
   return ompBuilder.get();
 }