[PATCH] D68394: [HIP] Enable specifying different default gpu arch for HIP/CUDA.

[Michael Liao via Phabricator via cfe-commits]

hliao created this revision.
hliao added reviewers: tra, yaxunl.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D68394

Files:
  clang/lib/Driver/Driver.cpp
  clang/test/Driver/hip-default-gpu-arch.hip


Index: clang/test/Driver/hip-default-gpu-arch.hip
===================================================================
--- /dev/null
+++ clang/test/Driver/hip-default-gpu-arch.hip
@@ -0,0 +1,7 @@
+// REQUIRES: clang-driver
+// REQUIRES: x86-registered-target
+// REQUIRES: amdgpu-registered-target
+
+// RUN: %clang -### -x hip -c %s 2>&1 | FileCheck %s
+
+// CHECK: {{.*}}clang{{.*}}"-target-cpu" "gfx600"
Index: clang/lib/Driver/Driver.cpp
===================================================================
--- clang/lib/Driver/Driver.cpp
+++ clang/lib/Driver/Driver.cpp
@@ -2329,6 +2329,10 @@
 
     /// Flag for -fgpu-rdc.
     bool Relocatable = false;
+
+    /// Default GPU architecture if there's no one specified.
+    CudaArch DefaultCudaArch = CudaArch::UNKNOWN;
+
   public:
     CudaActionBuilderBase(Compilation &C, DerivedArgList &Args,
                           const Driver::InputList &Inputs,
@@ -2518,7 +2522,7 @@
       // supported GPUs.  sm_20 code should work correctly, if
       // suboptimally, on all newer GPUs.
       if (GpuArchList.empty())
-        GpuArchList.push_back(CudaArch::SM_20);
+        GpuArchList.push_back(DefaultCudaArch);
 
       return Error;
     }
@@ -2530,7 +2534,9 @@
   public:
     CudaActionBuilder(Compilation &C, DerivedArgList &Args,
                       const Driver::InputList &Inputs)
-        : CudaActionBuilderBase(C, Args, Inputs, Action::OFK_Cuda) {}
+        : CudaActionBuilderBase(C, Args, Inputs, Action::OFK_Cuda) {
+      DefaultCudaArch = CudaArch::SM_20;
+    }
 
     ActionBuilderReturnCode
     getDeviceDependences(OffloadAction::DeviceDependences &DA,
@@ -2645,7 +2651,9 @@
   public:
     HIPActionBuilder(Compilation &C, DerivedArgList &Args,
                      const Driver::InputList &Inputs)
-        : CudaActionBuilderBase(C, Args, Inputs, Action::OFK_HIP) {}
+        : CudaActionBuilderBase(C, Args, Inputs, Action::OFK_HIP) {
+      DefaultCudaArch = CudaArch::GFX600;
+    }
 
     bool canUseBundlerUnbundler() const override { return true; }
 


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