[CUDA][OPENMP][NVPTX]Improve logic of the debug info support.

Summary:
Added support for the -gline-directives-only option + fixed logic of the
debug info for CUDA devices. If optimization level is O0, then options
--[no-]cuda-noopt-device-debug do not affect the debug info level. If
the optimization level is >O0, debug info options are used +
--no-cuda-noopt-device-debug is used or no --cuda-noopt-device-debug is
used, the optimization level for the device code is kept and the
emission of the debug directives is used.
If the opt level is > O0, debug info is requested +
--cuda-noopt-device-debug option is used, the optimization is disabled
for the device code + required debug info is emitted.

Reviewers: tra, echristo

Subscribers: aprantl, guansong, JDevlieghere, cfe-commits

Differential Revision: https://reviews.llvm.org/D51554

llvm-svn: 348930

1 files changed, 21 insertions, 10 deletions

diff --git a/clang/test/Driver/openmp-offload-gpu.c b/clang/test/Driver/openmp-offload-gpu.c
index 940828b82b3..dfdc79b5f70 100644
--- a/clang/test/Driver/openmp-offload-gpu.c
+++ b/clang/test/Driver/openmp-offload-gpu.c
@@ -190,29 +190,35 @@
 // CHK-BCLIB-WARN: No library 'libomptarget-nvptx-sm_20.bc' found in the default clang lib directory or in LIBRARY_PATH. Expect degraded performance due to no inlining of runtime functions on target devices.
 
 /// Check that debug info is emitted in dwarf-2
-// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -g -O0 --no-cuda-noopt-device-debug 2>&1 \
-// RUN:   | FileCheck -check-prefix=NO_DEBUG %s
+// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -g -O1 --no-cuda-noopt-device-debug 2>&1 \
+// RUN:   | FileCheck -check-prefix=DEBUG_DIRECTIVES %s
 // RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -g -O3 2>&1 \
-// RUN:   | FileCheck -check-prefix=NO_DEBUG %s
+// RUN:   | FileCheck -check-prefix=DEBUG_DIRECTIVES %s
 // RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -g -O3 --no-cuda-noopt-device-debug 2>&1 \
-// RUN:   | FileCheck -check-prefix=NO_DEBUG %s
+// RUN:   | FileCheck -check-prefix=DEBUG_DIRECTIVES %s
 // RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -g0 2>&1 \
 // RUN:   | FileCheck -check-prefix=NO_DEBUG %s
 // RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -ggdb0 -O3 --cuda-noopt-device-debug 2>&1 \
 // RUN:   | FileCheck -check-prefix=NO_DEBUG %s
-// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -gline-tables-only 2>&1 \
-// RUN:   | FileCheck -check-prefix=NO_DEBUG -check-prefix=LINE_TABLE %s
-// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -ggdb1 -O2 --cuda-noopt-device-debug 2>&1 \
-// RUN:   | FileCheck -check-prefix=NO_DEBUG -check-prefix=LINE_TABLE %s
+// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -gline-directives-only 2>&1 \
+// RUN:   | FileCheck -check-prefix=DEBUG_DIRECTIVES %s
 
-// LINE_TABLE-NOT: warning: debug
+// DEBUG_DIRECTIVES-NOT: warning: debug
 // NO_DEBUG-NOT: warning: debug
+// NO_DEBUG: "-fopenmp-is-device"
+// NO_DEBUG-NOT: "-debug-info-kind=
 // NO_DEBUG: ptxas
-// LINE_TABLE: "-lineinfo"
+// DEBUG_DIRECTIVES: "-triple" "nvptx64-nvidia-cuda"
+// DEBUG_DIRECTIVES-SAME: "-debug-info-kind=line-directives-only"
+// DEBUG_DIRECTIVES-SAME: "-fopenmp-is-device"
+// DEBUG_DIRECTIVES: ptxas
+// DEBUG_DIRECTIVES: "-lineinfo"
 // NO_DEBUG-NOT: "-g"
 // NO_DEBUG: nvlink
 // NO_DEBUG-NOT: "-g"
 
+// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -g -O0 --no-cuda-noopt-device-debug 2>&1 \
+// RUN:   | FileCheck -check-prefix=HAS_DEBUG %s
 // RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -g 2>&1 \
 // RUN:   | FileCheck -check-prefix=HAS_DEBUG %s
 // RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -g -O0 --cuda-noopt-device-debug 2>&1 \
@@ -227,9 +233,14 @@
 // RUN:   | FileCheck -check-prefix=HAS_DEBUG %s
 // RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -ggdb3 -O2 --cuda-noopt-device-debug 2>&1 \
 // RUN:   | FileCheck -check-prefix=HAS_DEBUG %s
+// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -gline-tables-only 2>&1 \
+// RUN:   | FileCheck -check-prefix=HAS_DEBUG %s
+// RUN:   %clang -### -no-canonical-prefixes -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target -march=sm_60 %s -ggdb1 -O2 --cuda-noopt-device-debug 2>&1 \
+// RUN:   | FileCheck -check-prefix=HAS_DEBUG %s
 
 // HAS_DEBUG-NOT: warning: debug
 // HAS_DEBUG: "-triple" "nvptx64-nvidia-cuda"
+// HAS_DEBUG-SAME: "-debug-info-kind={{limited|line-tables-only}}"
 // HAS_DEBUG-SAME: "-dwarf-version=2"
 // HAS_DEBUG-SAME: "-fopenmp-is-device"
 // HAS_DEBUG: ptxas