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[OpenMP][AMDGPU] Skip backend and assemble phases for amdgcn 

Remove emit-llvm-bc from addClangTargetOptions as it conflicts with -E for save-temps.

AMDGCN does not yet support linking object files so backend and assemble actions are
skipped, leaving LLVM IR as the output format.

Reviewed By: JonChesterfield, ronlieb

Differential Revision: https://reviews.llvm.org/D96769
This commit is contained in:
Pushpinder Singh 2021-03-16 04:54:21 +00:00
parent dddd590fd0
commit fc12a64ecc
3 changed files with 43 additions and 13 deletions
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10
clang/lib/Driver/Driver.cpp
View File

@ -3086,8 +3086,16 @@ class OffloadingActionBuilder final {
}
// By default, we produce an action for each device arch.
for (Action *&A : OpenMPDeviceActions)
for (unsigned I = 0; I < ToolChains.size(); ++I) {
Action *&A = OpenMPDeviceActions[I];
// AMDGPU does not support linking of object files, so we skip
// assemble and backend actions to produce LLVM IR.
if (ToolChains[I]->getTriple().isAMDGCN() &&
(CurPhase == phases::Assemble || CurPhase == phases::Backend))
continue;
A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
}
return ABRT_Success;
}

6
clang/lib/Driver/ToolChains/AMDGPUOpenMP.cpp
View File

@ -161,6 +161,11 @@ void AMDGCN::OpenMPLinker::ConstructJob(Compilation &C, const JobAction &JA,
// Each command outputs different files.
const char *LLVMLinkCommand =
constructLLVMLinkCommand(C, JA, Inputs, Args, GPUArch, Prefix);
// Produce readable assembly if save-temps is enabled.
if (C.getDriver().isSaveTempsEnabled())
constructLlcCommand(C, JA, Inputs, Args, GPUArch, Prefix, LLVMLinkCommand,
/*OutputIsAsm=*/true);
const char *LlcCommand = constructLlcCommand(C, JA, Inputs, Args, GPUArch,
Prefix, LLVMLinkCommand);
constructLldCommand(C, JA, Inputs, Output, Args, LlcCommand);
@ -189,7 +194,6 @@ void AMDGPUOpenMPToolChain::addClangTargetOptions(
CC1Args.push_back("-target-cpu");
CC1Args.push_back(DriverArgs.MakeArgStringRef(GpuArch));
CC1Args.push_back("-fcuda-is-device");
CC1Args.push_back("-emit-llvm-bc");
if (DriverArgs.hasArg(options::OPT_nogpulib))
return;

40
clang/test/Driver/amdgpu-openmp-toolchain.c
View File

@ -1,3 +1,4 @@
// REQUIRES: x86-registered-target
// REQUIRES: amdgpu-registered-target
// RUN: env LIBRARY_PATH=%S/Inputs/hip_dev_lib %clang -### --target=x86_64-unknown-linux-gnu -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 %s 2>&1 \
// RUN: | FileCheck %s
@ -5,7 +6,7 @@
// verify the tools invocations
// CHECK: clang{{.*}}"-cc1" "-triple" "x86_64-unknown-linux-gnu"{{.*}}"-x" "c"{{.*}}
// CHECK: clang{{.*}}"-cc1" "-triple" "x86_64-unknown-linux-gnu"{{.*}}"-x" "ir"{{.*}}
// CHECK: clang{{.*}}"-cc1"{{.*}}"-triple" "amdgcn-amd-amdhsa"{{.*}}"-target-cpu" "gfx906" "-fcuda-is-device" "-emit-llvm-bc" "-mlink-builtin-bitcode"{{.*}}libomptarget-amdgcn-gfx906.bc"{{.*}}
// CHECK: clang{{.*}}"-cc1"{{.*}}"-triple" "amdgcn-amd-amdhsa"{{.*}}"-target-cpu" "gfx906" "-fcuda-is-device" "-mlink-builtin-bitcode"{{.*}}libomptarget-amdgcn-gfx906.bc"{{.*}}
// CHECK: llvm-link{{.*}}"-o" "{{.*}}amdgpu-openmp-toolchain-{{.*}}-gfx906-linked-{{.*}}.bc"
// CHECK: llc{{.*}}amdgpu-openmp-toolchain-{{.*}}-gfx906-linked-{{.*}}.bc" "-mtriple=amdgcn-amd-amdhsa" "-mcpu=gfx906" "-filetype=obj" "-o"{{.*}}amdgpu-openmp-toolchain-{{.*}}-gfx906-{{.*}}.o"
// CHECK: lld{{.*}}"-flavor" "gnu" "--no-undefined" "-shared" "-o"{{.*}}amdgpu-openmp-toolchain-{{.*}}.out" "{{.*}}amdgpu-openmp-toolchain-{{.*}}-gfx906-{{.*}}.o"
@ -25,18 +26,35 @@
// CHECK-PHASES: 6: preprocessor, {5}, cpp-output, (device-openmp)
// CHECK-PHASES: 7: compiler, {6}, ir, (device-openmp)
// CHECK-PHASES: 8: offload, "host-openmp (x86_64-unknown-linux-gnu)" {2}, "device-openmp (amdgcn-amd-amdhsa)" {7}, ir
// CHECK-PHASES: 9: backend, {8}, assembler, (device-openmp)
// CHECK-PHASES: 10: assembler, {9}, object, (device-openmp)
// CHECK-PHASES: 11: linker, {10}, image, (device-openmp)
// CHECK-PHASES: 12: offload, "device-openmp (amdgcn-amd-amdhsa)" {11}, image
// CHECK-PHASES: 13: clang-offload-wrapper, {12}, ir, (host-openmp)
// CHECK-PHASES: 14: backend, {13}, assembler, (host-openmp)
// CHECK-PHASES: 15: assembler, {14}, object, (host-openmp)
// CHECK-PHASES: 16: linker, {4, 15}, image, (host-openmp)
// CHECK-PHASES: 9: linker, {8}, image, (device-openmp)
// CHECK-PHASES: 10: offload, "device-openmp (amdgcn-amd-amdhsa)" {9}, image
// CHECK-PHASES: 11: clang-offload-wrapper, {10}, ir, (host-openmp)
// CHECK-PHASES: 12: backend, {11}, assembler, (host-openmp)
// CHECK-PHASES: 13: assembler, {12}, object, (host-openmp)
// CHECK-PHASES: 14: linker, {4, 13}, image, (host-openmp)
// handling of --libomptarget-amdgcn-bc-path
// RUN: %clang -### --target=x86_64-unknown-linux-gnu -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx803 --libomptarget-amdgcn-bc-path=%S/Inputs/hip_dev_lib/libomptarget-amdgcn-gfx803.bc %s 2>&1 | FileCheck %s --check-prefix=CHECK-LIBOMPTARGET
// CHECK-LIBOMPTARGET: clang{{.*}}"-cc1"{{.*}}"-triple" "amdgcn-amd-amdhsa"{{.*}}"-target-cpu" "gfx803" "-fcuda-is-device" "-emit-llvm-bc" "-mlink-builtin-bitcode"{{.*}}Inputs/hip_dev_lib/libomptarget-amdgcn-gfx803.bc"{{.*}}
// CHECK-LIBOMPTARGET: clang{{.*}}"-cc1"{{.*}}"-triple" "amdgcn-amd-amdhsa"{{.*}}"-target-cpu" "gfx803" "-fcuda-is-device" "-mlink-builtin-bitcode"{{.*}}Inputs/hip_dev_lib/libomptarget-amdgcn-gfx803.bc"{{.*}}
// RUN: %clang -### --target=x86_64-unknown-linux-gnu -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx803 -nogpulib %s 2>&1 | FileCheck %s --check-prefix=CHECK-NOGPULIB
// CHECK-NOGPULIB-NOT: clang{{.*}}"-cc1"{{.*}}"-triple" "amdgcn-amd-amdhsa"{{.*}}"-target-cpu" "gfx803" "-fcuda-is-device" "-emit-llvm-bc" "-mlink-builtin-bitcode"{{.*}}libomptarget-amdgcn-gfx803.bc"{{.*}}
// CHECK-NOGPULIB-NOT: clang{{.*}}"-cc1"{{.*}}"-triple" "amdgcn-amd-amdhsa"{{.*}}"-target-cpu" "gfx803" "-fcuda-is-device" "-mlink-builtin-bitcode"{{.*}}libomptarget-amdgcn-gfx803.bc"{{.*}}
// RUN: %clang -### --target=x86_64-unknown-linux-gnu -ccc-print-bindings -save-temps -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx803 -nogpulib %s 2>&1 | FileCheck %s --check-prefix=CHECK-PRINT-BINDINGS
// CHECK-PRINT-BINDINGS: "x86_64-unknown-linux-gnu" - "clang", inputs: ["[[INPUT:.*]]"],
// CHECK-PRINT-BINDINGS: "x86_64-unknown-linux-gnu" - "clang",{{.*}} output: "[[HOST_BC:.*]]"
// CHECK-PRINT-BINDINGS: "x86_64-unknown-linux-gnu" - "clang", inputs: ["[[HOST_BC]]"], output: "[[HOST_S:.*]]"
// CHECK-PRINT-BINDINGS: "x86_64-unknown-linux-gnu" - "clang::as", inputs: ["[[HOST_S]]"], output: "[[HOST_O:.*]]"
// CHECK-PRINT-BINDINGS: "amdgcn-amd-amdhsa" - "clang", inputs: ["[[INPUT]]"], output: "[[DEVICE_I:.*]]"
// CHECK-PRINT-BINDINGS: "amdgcn-amd-amdhsa" - "clang", inputs: ["[[DEVICE_I]]", "[[HOST_BC]]"], output: "[[DEVICE_BC:.*]]"
// CHECK-PRINT-BINDINGS: "amdgcn-amd-amdhsa" - "AMDGCN::OpenMPLinker", inputs: ["[[DEVICE_BC]]"], output: "[[DEVICE_OUT:.*]]"
// CHECK-PRINT-BINDINGS: "x86_64-unknown-linux-gnu" - "offload wrapper", inputs: ["[[DEVICE_OUT]]"], output: "[[OFFLOAD_WRAPPER:.*]]"
// CHECK-PRINT-BINDINGS: "x86_64-unknown-linux-gnu" - "clang", inputs: ["[[OFFLOAD_WRAPPER]]"], output: "[[OFFLOAD_S:.*]]"
// CHECK-PRINT-BINDINGS: "x86_64-unknown-linux-gnu" - "clang::as", inputs: ["[[OFFLOAD_S]]"], output: "[[OFFLOAD_O:.*]]"
// CHECK-PRINT-BINDINGS: "x86_64-unknown-linux-gnu" - "GNU::Linker", inputs: ["[[HOST_O]]", "[[OFFLOAD_O]]"], output:
// verify the llc is invoked for textual assembly output
// RUN: env LIBRARY_PATH=%S/Inputs/hip_dev_lib %clang -### --target=x86_64-unknown-linux-gnu -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 -save-temps %s 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK-SAVE-ASM
// CHECK-SAVE-ASM: llc{{.*}}amdgpu-openmp-toolchain-{{.*}}-gfx906-linked.bc" "-mtriple=amdgcn-amd-amdhsa" "-mcpu=gfx906" "-filetype=asm" "-o"{{.*}}amdgpu-openmp-toolchain-{{.*}}-gfx906.s"
// CHECK-SAVE-ASM: llc{{.*}}amdgpu-openmp-toolchain-{{.*}}-gfx906-linked.bc" "-mtriple=amdgcn-amd-amdhsa" "-mcpu=gfx906" "-filetype=obj" "-o"{{.*}}amdgpu-openmp-toolchain-{{.*}}-gfx906.o"