[PATCH] D145815: [Flang][Driver] Add support for fopenmp-is-device and fembed-offload-object to Flang ToolChain

[Andrew Gozillon via Phabricator via cfe-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG0cd31a7d3087: [Flang][Driver] Add support for fopenmp-is-device and fembed-offload-object to… (authored by agozillon).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D145815/new/

https://reviews.llvm.org/D145815

Files:
  clang/lib/Driver/ToolChains/Flang.cpp
  clang/lib/Driver/ToolChains/Flang.h
  flang/test/Driver/omp-frontend-forwarding.f90


Index: flang/test/Driver/omp-frontend-forwarding.f90
===================================================================
--- /dev/null
+++ flang/test/Driver/omp-frontend-forwarding.f90
@@ -0,0 +1,22 @@
+! Test that flang-new OpenMP and OpenMP offload related 
+! commands forward or expand to the appropriate commands 
+! for flang-new -fc1 as expected.
+
+! Test regular -fopenmp with no offload
+! RUN: %flang -### -fopenmp %s 2>&1 | FileCheck --check-prefixes=CHECK-OPENMP %s
+! CHECK-OPENMP: "{{[^"]*}}flang-new" "-fc1" {{.*}} "-fopenmp" {{.*}}.f90"
+! CHECK-OPENMP-NOT: "{{[^"]*}}flang-new" "-fc1" {{.*}} "-fopenmp" {{.*}} "-fopenmp-is-device" {{.*}}.f90"
+
+! Test regular -fopenmp with offload for basic fopenmp-is-device flag addition and correct fopenmp 
+! RUN: %flang -### -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa %s 2>&1 | FileCheck --check-prefixes=CHECK-OPENMP-IS-DEVICE %s
+! CHECK-OPENMP-IS-DEVICE: "{{[^"]*}}flang-new" "-fc1" {{.*}} "-fopenmp" {{.*}} "-fopenmp-is-device" {{.*}}.f90"
+
+! Testing fembed-offload-object and fopenmp-is-device
+! RUN: %flang -S -### %s -o %t 2>&1 \
+! RUN: -fopenmp --offload-arch=gfx90a \
+! RUN: --target=aarch64-unknown-linux-gnu \
+! RUN:   | FileCheck %s --check-prefixes=CHECK-OPENMP-EMBED
+! CHECK-OPENMP-EMBED: "{{[^"]*}}flang-new" "-fc1" "-triple" "aarch64-unknown-linux-gnu" {{.*}} "-fopenmp" {{.*}}.f90"
+! CHECK-OPENMP-EMBED-NEXT: "{{[^"]*}}flang-new" "-fc1" "-triple" "amdgcn-amd-amdhsa" {{.*}} "-fopenmp" {{.*}} "-fopenmp-is-device" {{.*}}.f90"
+! CHECK-OPENMP-EMBED: "{{[^"]*}}clang-offload-packager" {{.*}} "--image=file={{.*}}.bc,triple=amdgcn-amd-amdhsa,arch=gfx90a,kind=openmp"
+! CHECK-OPENMP-EMBED-NEXT: "{{[^"]*}}flang-new" "-fc1" "-triple" "aarch64-unknown-linux-gnu" {{.*}} "-fopenmp" {{.*}} "-fembed-offload-object={{.*}}.out" {{.*}}.bc"
Index: clang/lib/Driver/ToolChains/Flang.h
===================================================================
--- clang/lib/Driver/ToolChains/Flang.h
+++ clang/lib/Driver/ToolChains/Flang.h
@@ -56,6 +56,17 @@
   void addTargetOptions(const llvm::opt::ArgList &Args,
                         llvm::opt::ArgStringList &CmdArgs) const;
 
+  /// Extract offload options from the driver arguments and add them to
+  /// the command arguments.
+  /// \param [in] C The current compilation for the driver invocation
+  /// \param [in] Inputs The input infomration on the current file inputs
+  /// \param [in] JA The job action
+  /// \param [in] Args The list of input driver arguments
+  /// \param [out] CmdArgs The list of output command arguments
+  void addOffloadOptions(Compilation &C, const InputInfoList &Inputs,
+                         const JobAction &JA, const llvm::opt::ArgList &Args,
+                         llvm::opt::ArgStringList &CmdArgs) const;
+
   /// Extract other compilation options from the driver arguments and add them
   /// to the command arguments.
   ///
Index: clang/lib/Driver/ToolChains/Flang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Flang.cpp
+++ clang/lib/Driver/ToolChains/Flang.cpp
@@ -114,6 +114,35 @@
   // TODO: Add target specific flags, ABI, mtune option etc.
 }
 
+void Flang::addOffloadOptions(Compilation &C, const InputInfoList &Inputs,
+                              const JobAction &JA, const ArgList &Args,
+                              ArgStringList &CmdArgs) const {
+  bool IsOpenMPDevice = JA.isDeviceOffloading(Action::OFK_OpenMP);
+  bool IsHostOffloadingAction = JA.isHostOffloading(Action::OFK_OpenMP) ||
+                                JA.isHostOffloading(C.getActiveOffloadKinds());
+
+  // Skips the primary input file, which is the input file that the compilation
+  // proccess will be executed upon (e.g. the host bitcode file) and
+  // adds the other secondary input (e.g. device bitcode files for embedding)
+  // to the embed offload object. This is condensed logic from the Clang driver
+  // for embedding offload objects during HostOffloading.
+  if (IsHostOffloadingAction) {
+    for (size_t i = 1; i < Inputs.size(); ++i) {
+      if (Inputs[i].getType() != types::TY_Nothing)
+        CmdArgs.push_back(
+            Args.MakeArgString("-fembed-offload-object=" +
+                               getToolChain().getInputFilename(Inputs[i])));
+    }
+  }
+
+  if (IsOpenMPDevice) {
+    // -fopenmp-is-device is passed along to tell the frontend that it is
+    // generating code for a device, so that only the relevant code is
+    // emitted.
+    CmdArgs.push_back("-fopenmp-is-device");
+  }
+}
+
 static void addFloatingPointOptions(const Driver &D, const ArgList &Args,
                                     ArgStringList &CmdArgs) {
   StringRef FPContract;
@@ -327,6 +356,9 @@
   // Add other compile options
   addOtherOptions(Args, CmdArgs);
 
+  // Offloading related options
+  addOffloadOptions(C, Inputs, JA, Args, CmdArgs);
+
   // Forward -Xflang arguments to -fc1
   Args.AddAllArgValues(CmdArgs, options::OPT_Xflang);
 


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