[flang-commits] [clang] [flang] [FLANG] allow -fopenmp= (PR #86816)
via flang-commits
flang-commits at lists.llvm.org
Wed Mar 27 08:44:20 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-flang-driver
Author: Mats Petersson (Leporacanthicus)
<details>
<summary>Changes</summary>
This enables the -fopenmp=<library> option to the set of options supported by flang.
The generated arguments for the FC1 compilation will appear in a slightly different order, so one test had to be updated to be less sensitive to order of the arguments.
---
Full diff: https://github.com/llvm/llvm-project/pull/86816.diff
4 Files Affected:
- (modified) clang/include/clang/Driver/Options.td (+2-1)
- (modified) clang/lib/Driver/ToolChains/Flang.cpp (+26-2)
- (added) flang/test/Driver/fopenmp.f90 (+60)
- (modified) flang/test/Driver/omp-driver-offload.f90 (+7-2)
``````````diff
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index aca8c9b0d5487a..3e78dada51a1b3 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -3403,7 +3403,8 @@ defm openmp_extensions: BoolFOption<"openmp-extensions",
"Enable all Clang extensions for OpenMP directives and clauses">,
NegFlag<SetFalse, [NoArgumentUnused], [ClangOption, CC1Option],
"Disable all Clang extensions for OpenMP directives and clauses">>;
-def fopenmp_EQ : Joined<["-"], "fopenmp=">, Group<f_Group>;
+def fopenmp_EQ : Joined<["-"], "fopenmp=">, Group<f_Group>,
+ Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>;
def fopenmp_use_tls : Flag<["-"], "fopenmp-use-tls">, Group<f_Group>,
Flags<[NoArgumentUnused, HelpHidden]>;
def fnoopenmp_use_tls : Flag<["-"], "fnoopenmp-use-tls">, Group<f_Group>,
diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index 6168b42dc78292..97326c2ed13f3c 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -38,8 +38,6 @@ void Flang::addFortranDialectOptions(const ArgList &Args,
Args.addAllArgs(CmdArgs, {options::OPT_ffixed_form,
options::OPT_ffree_form,
options::OPT_ffixed_line_length_EQ,
- options::OPT_fopenmp,
- options::OPT_fopenmp_version_EQ,
options::OPT_fopenacc,
options::OPT_finput_charset_EQ,
options::OPT_fimplicit_none,
@@ -764,6 +762,32 @@ void Flang::ConstructJob(Compilation &C, const JobAction &JA,
// Add other compile options
addOtherOptions(Args, CmdArgs);
+ // Forward flags for OpenMP. We don't do this if the current action is an
+ // device offloading action other than OpenMP.
+ if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
+ options::OPT_fno_openmp, false) &&
+ (JA.isDeviceOffloading(Action::OFK_None) ||
+ JA.isDeviceOffloading(Action::OFK_OpenMP))) {
+ switch (D.getOpenMPRuntime(Args)) {
+ case Driver::OMPRT_OMP:
+ case Driver::OMPRT_IOMP5:
+ // Clang can generate useful OpenMP code for these two runtime libraries.
+ CmdArgs.push_back("-fopenmp");
+ Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_version_EQ);
+
+ // FIXME: Clang supports a whole bunch more flags here.
+ break;
+ default:
+ // By default, if Clang doesn't know how to generate useful OpenMP code
+ // for a specific runtime library, we just don't pass the '-fopenmp' flag
+ // down to the actual compilation.
+ // FIXME: It would be better to have a mode which *only* omits IR
+ // generation based on the OpenMP support so that we get consistent
+ // semantic analysis, etc.
+ break;
+ }
+ }
+
// Offloading related options
addOffloadOptions(C, Inputs, JA, Args, CmdArgs);
diff --git a/flang/test/Driver/fopenmp.f90 b/flang/test/Driver/fopenmp.f90
new file mode 100644
index 00000000000000..068134a97a19d0
--- /dev/null
+++ b/flang/test/Driver/fopenmp.f90
@@ -0,0 +1,60 @@
+! RUN: %flang -target x86_64-linux-gnu -fopenmp=libomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-OPENMP
+! RUN: %flang -target x86_64-linux-gnu -fopenmp=libgomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-NO-OPENMP
+! RUN: %flang -target x86_64-linux-gnu -fopenmp=libiomp5 -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-OPENMP
+! RUN: %flang -target x86_64-apple-darwin -fopenmp=libomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-OPENMP
+! RUN: %flang -target x86_64-apple-darwin -fopenmp=libgomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-NO-OPENMP
+! RUN: %flang -target x86_64-apple-darwin -fopenmp=libiomp5 -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-OPENMP
+! RUN: %flang -target x86_64-freebsd -fopenmp=libomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-OPENMP
+! RUN: %flang -target x86_64-freebsd -fopenmp=libgomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-NO-OPENMP
+! RUN: %flang -target x86_64-freebsd -fopenmp=libiomp5 -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-OPENMP
+! RUN: %flang -target x86_64-windows-gnu -fopenmp=libomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-OPENMP
+! RUN: %flang -target x86_64-windows-gnu -fopenmp=libgomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-NO-OPENMP
+! RUN: %flang -target x86_64-windows-gnu -fopenmp=libiomp5 -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-FC1-OPENMP
+
+! CHECK-FC1-OPENMP: "-fc1"
+! CHECK-FC1-OPENMP: "-fopenmp"
+!
+! CHECK-FC1-NO-OPENMP: "-fc1"
+! CHECK-FC1-NO-OPENMP-NOT: "-fopenmp"
+!
+! RUN: %flang -target x86_64-linux-gnu -fopenmp=libomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-OMP
+! RUN: %flang -target x86_64-linux-gnu -fopenmp=libgomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-GOMP --check-prefix=CHECK-LD-GOMP-RT
+! RUN: %flang -target x86_64-linux-gnu -fopenmp=libiomp5 %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-IOMP5
+!
+! RUN: %flang -target x86_64-darwin -fopenmp=libomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-OMP
+! RUN: %flang -target x86_64-darwin -fopenmp=libgomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-GOMP --check-prefix=CHECK-LD-GOMP-NO-RT
+! RUN: %flang -target x86_64-darwin -fopenmp=libiomp5 %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-IOMP5
+!
+! RUN: %flang -target x86_64-freebsd -fopenmp=libomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-OMP
+! RUN: %flang -target x86_64-freebsd -fopenmp=libgomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-GOMP --check-prefix=CHECK-LD-GOMP-NO-RT
+! RUN: %flang -target x86_64-freebsd -fopenmp=libiomp5 %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-IOMP5
+!
+! RUN: %flang -target x86_64-windows-gnu -fopenmp=libomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-OMP
+! RUN: %flang -target x86_64-windows-gnu -fopenmp=libgomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-GOMP --check-prefix=CHECK-LD-GOMP-NO-RT
+! RUN: %flang -target x86_64-windows-gnu -fopenmp=libiomp5 %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-IOMP5MD
+!
+! CHECK-LD-OMP: "{{.*}}ld{{(.exe)?}}"
+! CHECK-LD-OMP: "-lomp"
+!
+! CHECK-LD-GOMP: "{{.*}}ld{{(.exe)?}}"
+! CHECK-LD-GOMP: "-lgomp"
+! CHECK-LD-GOMP-RT: "-lrt"
+! CHECK-LD-GOMP-NO-RT-NOT: "-lrt"
+!
+! CHECK-LD-IOMP5: "{{.*}}ld{{(.exe)?}}"
+! CHECK-LD-IOMP5: "-liomp5"
+!
+! CHECK-LD-IOMP5MD: "{{.*}}ld{{(.exe)?}}"
+! CHECK-LD-IOMP5MD: "-liomp5md"
+!
+! We'd like to check that the default is sane, but until we have the ability
+! to *always* semantically analyze OpenMP without always generating runtime
+! calls (in the event of an unsupported runtime), we don't have a good way to
+! test the CC1 invocation. Instead, just ensure we do eventually link *some*
+! OpenMP runtime.
+!
+! CHECK-LD-ANY: "{{.*}}ld{{(.exe)?}}"
+! CHECK-LD-ANY: "-l{{(omp|gomp|iomp5)}}"
+!
+! CHECK-LD-ANYMD: "{{.*}}ld{{(.exe)?}}"
+! CHECK-LD-ANYMD: "-l{{(omp|gomp|iomp5md)}}"
diff --git a/flang/test/Driver/omp-driver-offload.f90 b/flang/test/Driver/omp-driver-offload.f90
index 9b62699030c68f..7e9a73627cd757 100644
--- a/flang/test/Driver/omp-driver-offload.f90
+++ b/flang/test/Driver/omp-driver-offload.f90
@@ -57,9 +57,14 @@
! RUN: --target=aarch64-unknown-linux-gnu \
! RUN: | FileCheck %s --check-prefix=OPENMP-OFFLOAD-ARGS
! OPENMP-OFFLOAD-ARGS: "{{[^"]*}}flang-new" "-fc1" "-triple" "aarch64-unknown-linux-gnu" {{.*}} "-fopenmp" {{.*}}.f90"
-! OPENMP-OFFLOAD-ARGS-NEXT: "{{[^"]*}}flang-new" "-fc1" "-triple" "amdgcn-amd-amdhsa" {{.*}} "-fopenmp" {{.*}} "-fopenmp-host-ir-file-path" "{{.*}}.bc" "-fopenmp-is-target-device" {{.*}}.f90"
+! OPENMP-OFFLOAD-ARGS-NEXT: "{{[^"]*}}flang-new" "-fc1" "-triple" "amdgcn-amd-amdhsa"
+! OPENMP-OFFLOAD-ARGS-SAME: "-fopenmp"
+! OPENMP-OFFLOAD-ARGS-SAME: "-fopenmp-host-ir-file-path" "{{.*}}.bc" "-fopenmp-is-target-device"
+! OPENMP-OFFLOAD-ARGS-SAME: {{.*}}.f90"
! OPENMP-OFFLOAD-ARGS: "{{[^"]*}}clang-offload-packager{{.*}}" {{.*}} "--image=file={{.*}}.bc,triple=amdgcn-amd-amdhsa,arch=gfx90a,kind=openmp"
-! OPENMP-OFFLOAD-ARGS-NEXT: "{{[^"]*}}flang-new" "-fc1" "-triple" "aarch64-unknown-linux-gnu" {{.*}} "-fopenmp" {{.*}} "-fembed-offload-object={{.*}}.out" {{.*}}.bc"
+! OPENMP-OFFLOAD-ARGS-NEXT: "{{[^"]*}}flang-new" "-fc1" "-triple" "aarch64-unknown-linux-gnu"
+! OPENMP-OFFLOAD-ARGS-SAME: "-fopenmp"
+! OPENMP-OFFLOAD-ARGS-SAME: "-fembed-offload-object={{.*}}.out" {{.*}}.bc"
! Test -fopenmp with offload for RTL Flag Options
! RUN: %flang -### %s -o %t 2>&1 \
``````````
</details>
https://github.com/llvm/llvm-project/pull/86816
More information about the flang-commits
mailing list