[OpenMP] Enable previously successful offloading tests.

Create a separate test file to contain all tests for OpenMP
offloading to GPUs.

Make libdevice checking more robust by accounting for
the case in which no libdevice is found.

This changes are in connrection with diff: D29660

llvm-svn: 310718

1 files changed, 95 insertions, 0 deletions

diff --git a/clang/test/Driver/openmp-offload-gpu.c b/clang/test/Driver/openmp-offload-gpu.c
new file mode 100644
index 00000000000..ba1aa2a3605
--- /dev/null
+++ b/clang/test/Driver/openmp-offload-gpu.c
@@ -0,0 +1,95 @@
+///
+/// Perform several driver tests for OpenMP offloading
+///
+
+// Until this test is stabilized on all local configurations.
+// UNSUPPORTED: linux
+
+// REQUIRES: clang-driver
+// REQUIRES: x86-registered-target
+// REQUIRES: powerpc-registered-target
+// REQUIRES: nvptx-registered-target
+
+/// ###########################################################################
+
+/// Check -Xopenmp-target uses one of the archs provided when several archs are used.
+// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_35 -Xopenmp-target -march=sm_60 %s 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHK-FOPENMP-TARGET-ARCHS %s
+
+// CHK-FOPENMP-TARGET-ARCHS: ptxas{{.*}}" "--gpu-name" "sm_60"
+// CHK-FOPENMP-TARGET-ARCHS: nvlink{{.*}}" "-arch" "sm_60"
+
+/// ###########################################################################
+
+/// Check -Xopenmp-target -march=sm_35 works as expected when two triples are present.
+// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=powerpc64le-ibm-linux-gnu,nvptx64-nvidia-cuda -Xopenmp-target=nvptx64-nvidia-cuda -march=sm_35 %s 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHK-FOPENMP-TARGET-COMPILATION %s
+
+// CHK-FOPENMP-TARGET-COMPILATION: ptxas{{.*}}" "--gpu-name" "sm_35"
+// CHK-FOPENMP-TARGET-COMPILATION: nvlink{{.*}}" "-arch" "sm_35"
+
+/// ###########################################################################
+
+/// Check cubin file generation and usage by nvlink
+// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -save-temps %s 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHK-CUBIN %s
+
+// CHK-CUBIN: clang{{.*}}" "-o" "{{.*}}.s"
+// CHK-CUBIN-NEXT: ptxas{{.*}}" "--output-file" {{.*}}.cubin" {{.*}}.s"
+// CHK-CUBIN-NEXT: nvlink" {{.*}}.cubin"
+
+
+/// ###########################################################################
+
+/// Check cubin file generation and usage by nvlink when toolchain has BindArchAction
+// RUN:   %clang -### -no-canonical-prefixes -target x86_64-apple-darwin17.0.0 -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda %s 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHK-CUBIN-DARWIN %s
+
+// CHK-CUBIN-DARWIN: clang{{.*}}" "-o" "{{.*}}.s"
+// CHK-CUBIN-DARWIN-NEXT: ptxas{{.*}}" "--output-file" {{.*}}.cubin" {{.*}}.s"
+// CHK-CUBIN-DARWIN-NEXT: nvlink" {{.*}}.cubin"
+
+/// ###########################################################################
+
+/// Check cubin file generation and usage by nvlink
+// RUN:   touch %t1.o
+// RUN:   touch %t2.o
+// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda %t1.o %t2.o 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHK-TWOCUBIN %s
+
+// CHK-TWOCUBIN: nvlink"{{.*}}"openmp-offload-{{.*}}.cubin" "openmp-offload-{{.*}}.cubin"
+
+/// ###########################################################################
+
+/// Check cubin file generation and usage by nvlink when toolchain has BindArchAction
+// RUN:   touch %t1.o
+// RUN:   touch %t2.o
+// RUN:   %clang -### -no-canonical-prefixes -target x86_64-apple-darwin17.0.0 -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda %t1.o %t2.o 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHK-TWOCUBIN-DARWIN %s
+
+// CHK-TWOCUBIN-DARWIN: nvlink"{{.*}}"openmp-offload-{{.*}}.cubin" "openmp-offload-{{.*}}.cubin"
+
+/// ###########################################################################
+
+/// Check PTXAS is passed -c flag when offloading to an NVIDIA device using OpenMP.
+// RUN:   %clang -### -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -no-canonical-prefixes %s 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHK-PTXAS-DEFAULT %s
+
+// CHK-PTXAS-DEFAULT: ptxas{{.*}}" "-c"
+
+/// ###########################################################################
+
+/// PTXAS is passed -c flag by default when offloading to an NVIDIA device using OpenMP - disable it.
+// RUN:   %clang -### -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -fnoopenmp-relocatable-target -save-temps -no-canonical-prefixes %s 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHK-PTXAS-NORELO %s
+
+// CHK-PTXAS-NORELO-NOT: ptxas{{.*}}" "-c"
+
+/// ###########################################################################
+
+/// PTXAS is passed -c flag by default when offloading to an NVIDIA device using OpenMP
+/// Check that the flag is passed when -fopenmp-relocatable-target is used.
+// RUN:   %clang -### -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -fopenmp-relocatable-target -save-temps -no-canonical-prefixes %s 2>&1 \
+// RUN:   | FileCheck -check-prefix=CHK-PTXAS-RELO %s
+
+// CHK-PTXAS-RELO: ptxas{{.*}}" "-c"