[clang] [flang] [flang][cuda] Add -fcuda option (PR #84944)
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Tue Mar 12 09:37:49 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang
@llvm/pr-subscribers-flang-driver
Author: Valentin Clement (バレンタイン クレメン) (clementval)
<details>
<summary>Changes</summary>
Flang driver was already able to enable the CUDA language feature base on the file extension but there was no command line option. This PR adds one.
---
Full diff: https://github.com/llvm/llvm-project/pull/84944.diff
7 Files Affected:
- (modified) clang/include/clang/Driver/Options.td (+3)
- (modified) clang/lib/Driver/ToolChains/Flang.cpp (+1)
- (modified) flang/lib/Frontend/CompilerInvocation.cpp (+6)
- (modified) flang/lib/Frontend/FrontendAction.cpp (+8-3)
- (added) flang/test/Driver/cuda-option.f90 (+13)
- (modified) flang/test/Driver/driver-help-hidden.f90 (+1)
- (modified) flang/test/Driver/driver-help.f90 (+2)
``````````diff
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index aca8c9b0d5487a..bd28ec90bf7283 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -6488,6 +6488,9 @@ defm stack_arrays : BoolOptionWithoutMarshalling<"f", "stack-arrays",
defm loop_versioning : BoolOptionWithoutMarshalling<"f", "version-loops-for-stride",
PosFlag<SetTrue, [], [ClangOption], "Create unit-strided versions of loops">,
NegFlag<SetFalse, [], [ClangOption], "Do not create unit-strided loops (default)">>;
+
+def fcuda : Flag<["-"], "fcuda">, Group<f_Group>,
+ HelpText<"Enable CUDA">;
} // let Visibility = [FC1Option, FlangOption]
def J : JoinedOrSeparate<["-"], "J">,
diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index 6168b42dc78292..9b47ab0e7fcbf3 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -41,6 +41,7 @@ void Flang::addFortranDialectOptions(const ArgList &Args,
options::OPT_fopenmp,
options::OPT_fopenmp_version_EQ,
options::OPT_fopenacc,
+ options::OPT_fcuda,
options::OPT_finput_charset_EQ,
options::OPT_fimplicit_none,
options::OPT_fno_implicit_none,
diff --git a/flang/lib/Frontend/CompilerInvocation.cpp b/flang/lib/Frontend/CompilerInvocation.cpp
index 4707de0e976ca7..435f1df152c40d 100644
--- a/flang/lib/Frontend/CompilerInvocation.cpp
+++ b/flang/lib/Frontend/CompilerInvocation.cpp
@@ -877,6 +877,12 @@ static bool parseDialectArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
if (args.hasArg(clang::driver::options::OPT_flarge_sizes))
res.getDefaultKinds().set_sizeIntegerKind(8);
+ // -fcuda
+ if (args.hasArg(clang::driver::options::OPT_fcuda)) {
+ res.getFrontendOpts().features.Enable(
+ Fortran::common::LanguageFeature::CUDA);
+ }
+
// -fopenmp and -fopenacc
if (args.hasArg(clang::driver::options::OPT_fopenacc)) {
res.getFrontendOpts().features.Enable(
diff --git a/flang/lib/Frontend/FrontendAction.cpp b/flang/lib/Frontend/FrontendAction.cpp
index 599b4e11f0cfbd..bb1c239540d9f5 100644
--- a/flang/lib/Frontend/FrontendAction.cpp
+++ b/flang/lib/Frontend/FrontendAction.cpp
@@ -86,9 +86,14 @@ bool FrontendAction::beginSourceFile(CompilerInstance &ci,
invoc.collectMacroDefinitions();
}
- // Enable CUDA Fortran if source file is *.cuf/*.CUF.
- invoc.getFortranOpts().features.Enable(Fortran::common::LanguageFeature::CUDA,
- getCurrentInput().getIsCUDAFortran());
+ if (!invoc.getFortranOpts().features.IsEnabled(
+ Fortran::common::LanguageFeature::CUDA)) {
+ // Enable CUDA Fortran if source file is *.cuf/*.CUF and not already
+ // enabled.
+ invoc.getFortranOpts().features.Enable(
+ Fortran::common::LanguageFeature::CUDA,
+ getCurrentInput().getIsCUDAFortran());
+ }
// Decide between fixed and free form (if the user didn't express any
// preference, use the file extension to decide)
diff --git a/flang/test/Driver/cuda-option.f90 b/flang/test/Driver/cuda-option.f90
new file mode 100644
index 00000000000000..7bd1b3ddbffc3c
--- /dev/null
+++ b/flang/test/Driver/cuda-option.f90
@@ -0,0 +1,13 @@
+! Test -fcuda option
+! RUN: %flang -fc1 -cpp -fcuda -fdebug-unparse %s -o - | FileCheck %s
+
+program main
+#if _CUDA
+ integer :: var = _CUDA
+#endif
+ integer, device :: dvar
+end program
+
+! CHECK-LABEL: PROGRAM main
+! CHECK: INTEGER :: var = 1
+! CHECK: INTEGER, DEVICE :: dvar
diff --git a/flang/test/Driver/driver-help-hidden.f90 b/flang/test/Driver/driver-help-hidden.f90
index 44dbac44772b29..7b2e28263a825a 100644
--- a/flang/test/Driver/driver-help-hidden.f90
+++ b/flang/test/Driver/driver-help-hidden.f90
@@ -32,6 +32,7 @@
! CHECK-NEXT: -fbackslash Specify that backslash in string introduces an escape character
! CHECK-NEXT: -fcolor-diagnostics Enable colors in diagnostics
! CHECK-NEXT: -fconvert=<value> Set endian conversion of data for unformatted files
+! CHECK-NEXT: -fcuda Enable CUDA
! CHECK-NEXT: -fdefault-double-8 Set the default double precision kind to an 8 byte wide type
! CHECK-NEXT: -fdefault-integer-8 Set the default integer and logical kind to an 8 byte wide type
! CHECK-NEXT: -fdefault-real-8 Set the default real kind to an 8 byte wide type
diff --git a/flang/test/Driver/driver-help.f90 b/flang/test/Driver/driver-help.f90
index b4280a454e3128..dd8a7573375d7a 100644
--- a/flang/test/Driver/driver-help.f90
+++ b/flang/test/Driver/driver-help.f90
@@ -28,6 +28,7 @@
! HELP-NEXT: -fbackslash Specify that backslash in string introduces an escape character
! HELP-NEXT: -fcolor-diagnostics Enable colors in diagnostics
! HELP-NEXT: -fconvert=<value> Set endian conversion of data for unformatted files
+! HELP-NEXT: -fcuda Enable CUDA
! HELP-NEXT: -fdefault-double-8 Set the default double precision kind to an 8 byte wide type
! HELP-NEXT: -fdefault-integer-8 Set the default integer and logical kind to an 8 byte wide type
! HELP-NEXT: -fdefault-real-8 Set the default real kind to an 8 byte wide type
@@ -165,6 +166,7 @@
! HELP-FC1-NEXT: -fbackslash Specify that backslash in string introduces an escape character
! HELP-FC1-NEXT: -fcolor-diagnostics Enable colors in diagnostics
! HELP-FC1-NEXT: -fconvert=<value> Set endian conversion of data for unformatted files
+! HELP-FC1-NEXT: -fcuda Enable CUDA
! HELP-FC1-NEXT: -fdebug-dump-all Dump symbols and the parse tree after the semantic checks
! HELP-FC1-NEXT: -fdebug-dump-parse-tree-no-sema
! HELP-FC1-NEXT: Dump the parse tree (skips the semantic checks)
``````````
</details>
https://github.com/llvm/llvm-project/pull/84944
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