[clang] 3b52341 - [CUDA] Fix output name being replaced in device-only mode

[Joseph Huber via cfe-commits]

Author: Joseph Huber
Date: 2022-08-05T19:08:41-04:00
New Revision: 3b52341116b794e53dec2fd07e568884e5a0b8bb

URL: https://github.com/llvm/llvm-project/commit/3b52341116b794e53dec2fd07e568884e5a0b8bb
DIFF: https://github.com/llvm/llvm-project/commit/3b52341116b794e53dec2fd07e568884e5a0b8bb.diff

LOG: [CUDA] Fix output name being replaced in device-only mode

When performing device only compilation, there was an issue where
`cubin` outputs were being renamed to `cubin` despite the user's name.
This is required in a normal compilation flow as the Nvidia tools only
understand specific filenames instead of checking magic bytes for some
unknown reason. We do not want to perform this transformation when the
user is performing device only compilation.

Reviewed By: tra

Differential Revision: https://reviews.llvm.org/D131278

Added: 
    

Modified: 
    clang/lib/Driver/ToolChains/Cuda.cpp
    clang/test/Driver/cuda-bindings.cu

Removed: 
    


################################################################################
diff  --git a/clang/lib/Driver/ToolChains/Cuda.cpp b/clang/lib/Driver/ToolChains/Cuda.cpp
index 5e59677947e62..7ad990dda467e 100644
--- a/clang/lib/Driver/ToolChains/Cuda.cpp
+++ b/clang/lib/Driver/ToolChains/Cuda.cpp
@@ -693,8 +693,8 @@ CudaToolChain::CudaToolChain(const Driver &D, const llvm::Triple &Triple,
 
 std::string CudaToolChain::getInputFilename(const InputInfo &Input) const {
   // Only object files are changed, for example assembly files keep their .s
-  // extensions. 
-  if (Input.getType() != types::TY_Object)
+  // extensions. If the user requested device-only compilation don't change it.
+  if (Input.getType() != types::TY_Object || getDriver().offloadDeviceOnly())
     return ToolChain::getInputFilename(Input);
 
   // Replace extension for object files with cubin because nvlink relies on

diff  --git a/clang/test/Driver/cuda-bindings.cu b/clang/test/Driver/cuda-bindings.cu
index 6cc21251bfdd3..7115117e79ce5 100644
--- a/clang/test/Driver/cuda-bindings.cu
+++ b/clang/test/Driver/cuda-bindings.cu
@@ -135,3 +135,14 @@
 // RUN: | FileCheck -check-prefix=DASM2 %s
 // DASM2: # "nvptx64-nvidia-cuda" - "clang",{{.*}} output: "cuda-bindings-cuda-nvptx64-nvidia-cuda-sm_30.s"
 // DASM2: # "nvptx64-nvidia-cuda" - "clang",{{.*}} output: "cuda-bindings-cuda-nvptx64-nvidia-cuda-sm_35.s"
+
+//
+// Ensure we output the user's specified name in device-only mode.
+//
+// RUN: %clang -target powerpc64le-ibm-linux-gnu -### \
+// RUN:        --cuda-gpu-arch=sm_52 --cuda-device-only -c -o foo.o %s 2>&1 \
+// RUN: | FileCheck -check-prefix=D_ONLY %s
+// RUN: %clang -target powerpc64le-ibm-linux-gnu -### --offload-new-driver \
+// RUN:        --cuda-gpu-arch=sm_52 --cuda-device-only -c -o foo.o %s 2>&1 \
+// RUN: | FileCheck -check-prefix=D_ONLY %s
+// D_ONLY: "foo.o"