[flang-commits] [flang] [mlir] [clang] [Flang][OpenMP][MLIR] Add support for -nogpulib option (PR #71045)
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flang-commits at lists.llvm.org
Thu Nov 2 03:55:02 PDT 2023
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-mlir-llvm
Author: Dominik Adamski (DominikAdamski)
<details>
<summary>Changes</summary>
If -nogpulib option is passed by the user, then the OpenMP device runtime is not used and we should not emit globals to configure debugging at compile-time for the device runtime.
Link to -nogpulib flag implementation for Clang: https://reviews.llvm.org/D125314
---
Full diff: https://github.com/llvm/llvm-project/pull/71045.diff
14 Files Affected:
- (modified) clang/include/clang/Driver/Options.td (+1-1)
- (modified) clang/lib/Driver/ToolChains/Flang.cpp (+2)
- (modified) flang/include/flang/Frontend/LangOptions.def (+2)
- (modified) flang/include/flang/Tools/CrossToolHelpers.h (+7-4)
- (modified) flang/lib/Frontend/CompilerInvocation.cpp (+2)
- (modified) flang/test/Driver/driver-help-hidden.f90 (+1)
- (modified) flang/test/Driver/driver-help.f90 (+2)
- (added) flang/test/Lower/OpenMP/nogpulib.f90 (+12)
- (modified) flang/tools/bbc/bbc.cpp (+7-1)
- (modified) mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td (+1)
- (modified) mlir/include/mlir/Dialect/OpenMP/OpenMPOpsInterfaces.td (+3-2)
- (modified) mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp (+6-2)
- (modified) mlir/test/Dialect/OpenMP/attr.mlir (+6)
- (modified) mlir/test/Target/LLVMIR/openmp-llvm.mlir (+10)
``````````diff
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index b1229b2f4562379..cc50b45b7933d5f 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -5092,7 +5092,7 @@ def nohipwrapperinc : Flag<["-"], "nohipwrapperinc">, Group<IncludePath_Group>,
HelpText<"Do not include the default HIP wrapper headers and include paths">;
def : Flag<["-"], "nocudainc">, Alias<nogpuinc>;
def nogpulib : Flag<["-"], "nogpulib">, MarshallingInfoFlag<LangOpts<"NoGPULib">>,
- Visibility<[ClangOption, CC1Option]>,
+ Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
HelpText<"Do not link device library for CUDA/HIP device compilation">;
def : Flag<["-"], "nocudalib">, Alias<nogpulib>;
def gpulibc : Flag<["-"], "gpulibc">, Visibility<[ClangOption, CC1Option]>,
diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index 999039f83ddfb92..17d9ac7632128d6 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -295,6 +295,8 @@ void Flang::addOffloadOptions(Compilation &C, const InputInfoList &Inputs,
CmdArgs.push_back("-fopenmp-assume-no-thread-state");
if (Args.hasArg(options::OPT_fopenmp_assume_no_nested_parallelism))
CmdArgs.push_back("-fopenmp-assume-no-nested-parallelism");
+ if (Args.hasArg(options::OPT_nogpulib))
+ CmdArgs.push_back("-nogpulib");
}
}
diff --git a/flang/include/flang/Frontend/LangOptions.def b/flang/include/flang/Frontend/LangOptions.def
index 3a1d44f7fb472d1..2bf10826120a8bd 100644
--- a/flang/include/flang/Frontend/LangOptions.def
+++ b/flang/include/flang/Frontend/LangOptions.def
@@ -21,6 +21,8 @@ LANGOPT(Name, Bits, Default)
ENUM_LANGOPT(FPContractMode, FPModeKind, 2, FPM_Fast) ///< FP Contract Mode (off/fast)
+/// Indicate a build without the standard GPU libraries.
+LANGOPT(NoGPULib , 1, false)
/// Permit floating point optimization without regard to infinities
LANGOPT(NoHonorInfs, 1, false)
/// Permit floating point optimization without regard to NaN
diff --git a/flang/include/flang/Tools/CrossToolHelpers.h b/flang/include/flang/Tools/CrossToolHelpers.h
index ddec70fa9824c52..3b51a3845625df3 100644
--- a/flang/include/flang/Tools/CrossToolHelpers.h
+++ b/flang/include/flang/Tools/CrossToolHelpers.h
@@ -53,14 +53,16 @@ struct OffloadModuleOpts {
OffloadModuleOpts(uint32_t OpenMPTargetDebug, bool OpenMPTeamSubscription,
bool OpenMPThreadSubscription, bool OpenMPNoThreadState,
bool OpenMPNoNestedParallelism, bool OpenMPIsTargetDevice,
- bool OpenMPIsGPU, uint32_t OpenMPVersion, std::string OMPHostIRFile = {})
+ bool OpenMPIsGPU, uint32_t OpenMPVersion, std::string OMPHostIRFile = {},
+ bool NoGPULib = false)
: OpenMPTargetDebug(OpenMPTargetDebug),
OpenMPTeamSubscription(OpenMPTeamSubscription),
OpenMPThreadSubscription(OpenMPThreadSubscription),
OpenMPNoThreadState(OpenMPNoThreadState),
OpenMPNoNestedParallelism(OpenMPNoNestedParallelism),
OpenMPIsTargetDevice(OpenMPIsTargetDevice), OpenMPIsGPU(OpenMPIsGPU),
- OpenMPVersion(OpenMPVersion), OMPHostIRFile(OMPHostIRFile) {}
+ OpenMPVersion(OpenMPVersion), OMPHostIRFile(OMPHostIRFile),
+ NoGPULib(NoGPULib) {}
OffloadModuleOpts(Fortran::frontend::LangOptions &Opts)
: OpenMPTargetDebug(Opts.OpenMPTargetDebug),
@@ -70,7 +72,7 @@ struct OffloadModuleOpts {
OpenMPNoNestedParallelism(Opts.OpenMPNoNestedParallelism),
OpenMPIsTargetDevice(Opts.OpenMPIsTargetDevice),
OpenMPIsGPU(Opts.OpenMPIsGPU), OpenMPVersion(Opts.OpenMPVersion),
- OMPHostIRFile(Opts.OMPHostIRFile) {}
+ OMPHostIRFile(Opts.OMPHostIRFile), NoGPULib(Opts.NoGPULib) {}
uint32_t OpenMPTargetDebug = 0;
bool OpenMPTeamSubscription = false;
@@ -81,6 +83,7 @@ struct OffloadModuleOpts {
bool OpenMPIsGPU = false;
uint32_t OpenMPVersion = 11;
std::string OMPHostIRFile = {};
+ bool NoGPULib = false;
};
// Shares assinging of the OpenMP OffloadModuleInterface and its assorted
@@ -95,7 +98,7 @@ void setOffloadModuleInterfaceAttributes(
if (Opts.OpenMPIsTargetDevice) {
offloadMod.setFlags(Opts.OpenMPTargetDebug, Opts.OpenMPTeamSubscription,
Opts.OpenMPThreadSubscription, Opts.OpenMPNoThreadState,
- Opts.OpenMPNoNestedParallelism, Opts.OpenMPVersion);
+ Opts.OpenMPNoNestedParallelism, Opts.OpenMPVersion, Opts.NoGPULib);
if (!Opts.OMPHostIRFile.empty())
offloadMod.setHostIRFilePath(Opts.OMPHostIRFile);
diff --git a/flang/lib/Frontend/CompilerInvocation.cpp b/flang/lib/Frontend/CompilerInvocation.cpp
index ba2ecab3742587a..ef0db22037283d3 100644
--- a/flang/lib/Frontend/CompilerInvocation.cpp
+++ b/flang/lib/Frontend/CompilerInvocation.cpp
@@ -881,6 +881,8 @@ static bool parseDialectArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
args.hasArg(clang::driver::options::OPT_fopenmp_target_debug))
res.getLangOpts().OpenMPTargetDebug = 1;
}
+ if (args.hasArg(clang::driver::options::OPT_nogpulib))
+ res.getLangOpts().NoGPULib = 1;
}
switch (llvm::Triple(res.getTargetOpts().triple).getArch()) {
diff --git a/flang/test/Driver/driver-help-hidden.f90 b/flang/test/Driver/driver-help-hidden.f90
index 6d399f1d179a022..2e65096d0c3fec4 100644
--- a/flang/test/Driver/driver-help-hidden.f90
+++ b/flang/test/Driver/driver-help-hidden.f90
@@ -119,6 +119,7 @@
! CHECK-NEXT: --no-offload-arch=<value>
! CHECK-NEXT: Remove CUDA/HIP offloading device architecture (e.g. sm_35, gfx906) from the list of devices to compile for. 'all' resets the list to its default value.
! CHECK-NEXT: -nocpp Disable predefined and command line preprocessor macros
+! CHECK-NEXT: -nogpulib Do not link device library for CUDA/HIP device compilation
! CHECK-NEXT: --offload-arch=<value> Specify an offloading device architecture for CUDA, HIP, or OpenMP. (e.g. sm_35). If 'native' is used the compiler will detect locally installed architectures. For HIP offloading, the device architecture can be followed by target ID features delimited by a colon (e.g. gfx908:xnack+:sramecc-). May be specified more than once.
! CHECK-NEXT: --offload-device-only Only compile for the offloading device.
! CHECK-NEXT: --offload-host-device Compile for both the offloading host and device (default).
diff --git a/flang/test/Driver/driver-help.f90 b/flang/test/Driver/driver-help.f90
index 31c9caa32ea8292..a29e8a0b69db46d 100644
--- a/flang/test/Driver/driver-help.f90
+++ b/flang/test/Driver/driver-help.f90
@@ -107,6 +107,7 @@
! HELP-NEXT: --no-offload-arch=<value>
! HELP-NEXT: Remove CUDA/HIP offloading device architecture (e.g. sm_35, gfx906) from the list of devices to compile for. 'all' resets the list to its default value.
! HELP-NEXT: -nocpp Disable predefined and command line preprocessor macros
+! HELP-NEXT: -nogpulib Do not link device library for CUDA/HIP device compilation
! HELP-NEXT: --offload-arch=<value> Specify an offloading device architecture for CUDA, HIP, or OpenMP. (e.g. sm_35). If 'native' is used the compiler will detect locally installed architectures. For HIP offloading, the device architecture can be followed by target ID features delimited by a colon (e.g. gfx908:xnack+:sramecc-). May be specified more than once.
! HELP-NEXT: --offload-device-only Only compile for the offloading device.
! HELP-NEXT: --offload-host-device Compile for both the offloading host and device (default).
@@ -239,6 +240,7 @@
! HELP-FC1-NEXT: -mvscale-max=<value> Specify the vscale maximum. Defaults to the vector length agnostic value of "0". (AArch64/RISC-V only)
! HELP-FC1-NEXT: -mvscale-min=<value> Specify the vscale minimum. Defaults to "1". (AArch64/RISC-V only)
! HELP-FC1-NEXT: -nocpp Disable predefined and command line preprocessor macros
+! HELP-FC1-NEXT: -nogpulib Do not link device library for CUDA/HIP device compilation
! HELP-FC1-NEXT: -opt-record-file <value>
! HELP-FC1-NEXT: File name to use for YAML optimization record output
! HELP-FC1-NEXT: -opt-record-format <value>
diff --git a/flang/test/Lower/OpenMP/nogpulib.f90 b/flang/test/Lower/OpenMP/nogpulib.f90
new file mode 100644
index 000000000000000..f2e67136ecd7481
--- /dev/null
+++ b/flang/test/Lower/OpenMP/nogpulib.f90
@@ -0,0 +1,12 @@
+!REQUIRES: amdgpu-registered-target
+
+!RUN: %flang_fc1 -triple amdgcn-amd-amdhsa -emit-hlfir -fopenmp -fopenmp-is-target-device %s -o - | FileCheck %s
+!RUN: bbc -fopenmp -fopenmp-is-target-device -fopenmp-is-gpu -emit-hlfir -o - %s | FileCheck %s
+!RUN: %flang_fc1 -triple amdgcn-amd-amdhsa -emit-hlfir -fopenmp -fopenmp-is-target-device -nogpulib %s -o - | FileCheck %s -check-prefix=FLAG_SET
+!RUN: bbc -fopenmp -fopenmp-is-target-device -fopenmp-is-gpu -emit-hlfir -nogpulib -o - %s | FileCheck %s -check-prefix=FLAG_SET
+
+!CHECK-NOT: module attributes {{{.*}}no_gpu_lib
+!FLAG_SET: module attributes {{{.*}}no_gpu_lib = true
+subroutine omp_subroutine()
+end subroutine omp_subroutine
+
diff --git a/flang/tools/bbc/bbc.cpp b/flang/tools/bbc/bbc.cpp
index 378216bd1e51f8f..a66c41eed59651c 100644
--- a/flang/tools/bbc/bbc.cpp
+++ b/flang/tools/bbc/bbc.cpp
@@ -177,6 +177,12 @@ static llvm::cl::opt<bool> setOpenMPNoNestedParallelism(
"a parallel region."),
llvm::cl::init(false));
+static llvm::cl::opt<bool>
+ setNoGPULib("nogpulib",
+ llvm::cl::desc("Do not link device library for CUDA/HIP device "
+ "compilation"),
+ llvm::cl::init(false));
+
static llvm::cl::opt<bool> enableOpenACC("fopenacc",
llvm::cl::desc("enable openacc"),
llvm::cl::init(false));
@@ -316,7 +322,7 @@ static mlir::LogicalResult convertFortranSourceToMLIR(
OffloadModuleOpts(setOpenMPTargetDebug, setOpenMPTeamSubscription,
setOpenMPThreadSubscription, setOpenMPNoThreadState,
setOpenMPNoNestedParallelism, enableOpenMPDevice,
- enableOpenMPGPU, setOpenMPVersion);
+ enableOpenMPGPU, setOpenMPVersion, "", setNoGPULib);
setOffloadModuleInterfaceAttributes(mlirModule, offloadModuleOpts);
setOpenMPVersionAttribute(mlirModule, setOpenMPVersion);
}
diff --git a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
index 72121ad4f9e47a5..ae2dd018059e3aa 100644
--- a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
+++ b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
@@ -65,6 +65,7 @@ def FlagsAttr : OpenMP_Attr<"Flags", "flags"> {
DefaultValuedParameter<"bool", "false">:$assume_threads_oversubscription,
DefaultValuedParameter<"bool", "false">:$assume_no_thread_state,
DefaultValuedParameter<"bool", "false">:$assume_no_nested_parallelism,
+ DefaultValuedParameter<"bool", "false">:$no_gpu_lib,
DefaultValuedParameter<"uint32_t", "50">:$openmp_device_version
);
diff --git a/mlir/include/mlir/Dialect/OpenMP/OpenMPOpsInterfaces.td b/mlir/include/mlir/Dialect/OpenMP/OpenMPOpsInterfaces.td
index 77001fc816cf91f..89d04af64766fc2 100644
--- a/mlir/include/mlir/Dialect/OpenMP/OpenMPOpsInterfaces.td
+++ b/mlir/include/mlir/Dialect/OpenMP/OpenMPOpsInterfaces.td
@@ -198,11 +198,12 @@ def OffloadModuleInterface : OpInterface<"OffloadModuleInterface"> {
"bool":$assumeThreadsOversubscription,
"bool":$assumeNoThreadState,
"bool":$assumeNoNestedParallelism,
- "uint32_t":$openmpDeviceVersion), [{}], [{
+ "uint32_t":$openmpDeviceVersion,
+ "bool":$noGPULib), [{}], [{
$_op->setAttr(("omp." + mlir::omp::FlagsAttr::getMnemonic()).str(),
mlir::omp::FlagsAttr::get($_op->getContext(), debugKind,
assumeTeamsOversubscription, assumeThreadsOversubscription,
- assumeNoThreadState, assumeNoNestedParallelism, openmpDeviceVersion));
+ assumeNoThreadState, assumeNoNestedParallelism, noGPULib, openmpDeviceVersion));
}]>,
InterfaceMethod<
/*description=*/[{
diff --git a/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp b/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
index 1daf60b8659bb66..083b507f405f426 100644
--- a/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
@@ -2011,6 +2011,12 @@ LogicalResult convertFlagsAttr(Operation *op, mlir::omp::FlagsAttr attribute,
llvm::OpenMPIRBuilder *ompBuilder = moduleTranslation.getOpenMPBuilder();
+ ompBuilder->M.addModuleFlag(llvm::Module::Max, "openmp-device",
+ attribute.getOpenmpDeviceVersion());
+
+ if (attribute.getNoGpuLib())
+ return success();
+
ompBuilder->createGlobalFlag(
attribute.getDebugKind() /*LangOpts().OpenMPTargetDebug*/,
"__omp_rtl_debug_kind");
@@ -2032,8 +2038,6 @@ LogicalResult convertFlagsAttr(Operation *op, mlir::omp::FlagsAttr attribute,
.getAssumeNoNestedParallelism() /*LangOpts().OpenMPNoNestedParallelism*/
,
"__omp_rtl_assume_no_nested_parallelism");
- ompBuilder->M.addModuleFlag(llvm::Module::Max, "openmp-device",
- attribute.getOpenmpDeviceVersion());
return success();
}
diff --git a/mlir/test/Dialect/OpenMP/attr.mlir b/mlir/test/Dialect/OpenMP/attr.mlir
index fc89ebd01b6bf57..2e88dac8ff4d2b9 100644
--- a/mlir/test/Dialect/OpenMP/attr.mlir
+++ b/mlir/test/Dialect/OpenMP/attr.mlir
@@ -54,6 +54,12 @@ module attributes {omp.flags = #omp.flags<assume_teams_oversubscription = true,
// CHECK: module attributes {omp.flags = #omp.flags<assume_teams_oversubscription = true, assume_no_thread_state = true, openmp_device_version = 51>} {
module attributes {omp.flags = #omp.flags<assume_no_thread_state = true, assume_teams_oversubscription = true, openmp_device_version = 51>} {}
+// CHECK: module attributes {omp.flags = #omp.flags<assume_teams_oversubscription = true, assume_no_thread_state = true, no_gpu_lib = true, openmp_device_version = 51>} {
+module attributes {omp.flags = #omp.flags<assume_no_thread_state = true, assume_teams_oversubscription = true, no_gpu_lib = true, openmp_device_version = 51>} {}
+
+// CHECK: module attributes {omp.flags = #omp.flags<assume_teams_oversubscription = true, openmp_device_version = 51>} {
+module attributes {omp.flags = #omp.flags<assume_teams_oversubscription = true, no_gpu_lib = false, openmp_device_version = 51>} {}
+
// CHECK: module attributes {omp.version = #omp.version<version = 51>} {
module attributes {omp.version = #omp.version<version = 51>} {}
diff --git a/mlir/test/Target/LLVMIR/openmp-llvm.mlir b/mlir/test/Target/LLVMIR/openmp-llvm.mlir
index 116c05f3747c6ae..8da17107466f817 100644
--- a/mlir/test/Target/LLVMIR/openmp-llvm.mlir
+++ b/mlir/test/Target/LLVMIR/openmp-llvm.mlir
@@ -2530,6 +2530,16 @@ module attributes {omp.flags = #omp.flags<assume_teams_oversubscription = true,
// -----
+// CHECK-NOT: @__omp_rtl_debug_kind = weak_odr hidden constant i32 0
+// CHECK-NOT: @__omp_rtl_assume_teams_oversubscription = weak_odr hidden constant i32 1
+// CHECK-NOT: @__omp_rtl_assume_threads_oversubscription = weak_odr hidden constant i32 0
+// CHECK-NOT: @__omp_rtl_assume_no_thread_state = weak_odr hidden constant i32 1
+// CHECK-NOT: @__omp_rtl_assume_no_nested_parallelism = weak_odr hidden constant i32 0
+module attributes {omp.flags = #omp.flags<assume_teams_oversubscription = true, assume_no_thread_state = true,
+ no_gpu_lib=true>} {}
+
+// -----
+
module attributes {omp.is_target_device = false} {
// CHECK: define void @filter_nohost
llvm.func @filter_nohost() -> ()
``````````
</details>
https://github.com/llvm/llvm-project/pull/71045
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