[clang] e5cdb6c - [flang][driver] Add support for `-c` and `-emit-obj`
Andrzej Warzynski via cfe-commits
cfe-commits at lists.llvm.org
Thu Jan 7 02:53:36 PST 2021
Author: Andrzej Warzynski
Date: 2021-01-07T10:52:38Z
New Revision: e5cdb6c56edf656d03f57c5c285cfa8c6b7b6f57
URL: https://github.com/llvm/llvm-project/commit/e5cdb6c56edf656d03f57c5c285cfa8c6b7b6f57
DIFF: https://github.com/llvm/llvm-project/commit/e5cdb6c56edf656d03f57c5c285cfa8c6b7b6f57.diff
LOG: [flang][driver] Add support for `-c` and `-emit-obj`
This patch adds a frontend action for emitting object files. While Flang
does not support code-generation, this action remains a placeholder.
This patch simply provides glue-code to connect the compiler driver
with the appropriate frontend action.
The new action is triggered with the `-c` compiler driver flag, i.e.
`flang-new -c`. This is then translated to `flang-new -fc1 -emit-obj`,
so `-emit-obj` has to be marked as supported as well.
As code-generation is not available yet, `flang-new -c` results in a
driver error:
```
error: code-generation is not available yet
```
Hopefully this will help communicating the level of available
functionality within Flang.
The definition of `emit-obj` is updated so that it can be shared between
Clang and Flang. As the original definition was enclosed within a
Clang-specific TableGen `let` statement, it is extracted into a new `let`
statement. That felt like the cleanest option.
I also commented out `-triple` in Flang::ConstructJob and updated some
comments there. This is similar to https://reviews.llvm.org/D93027. I
wanted to make sure that it's clear that we can't support `-triple`
until we have code-generation. However, once code-generation is
available we _will need_ `-triple`.
As this patch adds `-emit-obj`, the emit-obj.f90 becomes irrelevant and
is deleted. Instead, phases.f90 is added to demonstrate that users can
control compilation phases (indeed, `-c` is a phase control flag).
Reviewed By: SouraVX, clementval
Differential Revision: https://reviews.llvm.org/D93301
Added:
flang/test/Flang-Driver/code-gen.f90
flang/test/Flang-Driver/phases.f90
Modified:
clang/include/clang/Driver/Options.td
clang/lib/Driver/ToolChains/Flang.cpp
flang/include/flang/Frontend/FrontendActions.h
flang/include/flang/Frontend/FrontendOptions.h
flang/lib/Frontend/CompilerInvocation.cpp
flang/lib/Frontend/FrontendActions.cpp
flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
flang/test/Flang-Driver/driver-help-hidden.f90
flang/test/Flang-Driver/driver-help.f90
Removed:
flang/test/Flang-Driver/emit-obj.f90
################################################################################
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 6b5ae35ad7e0..ffa7fbd84df9 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -857,7 +857,7 @@ def current__version : JoinedOrSeparate<["-"], "current_version">;
def cxx_isystem : JoinedOrSeparate<["-"], "cxx-isystem">, Group<clang_i_Group>,
HelpText<"Add directory to the C++ SYSTEM include search path">, Flags<[CC1Option]>,
MetaVarName<"<directory>">;
-def c : Flag<["-"], "c">, Flags<[NoXarchOption]>, Group<Action_Group>,
+def c : Flag<["-"], "c">, Flags<[NoXarchOption, FlangOption]>, Group<Action_Group>,
HelpText<"Only run preprocess, compile, and assemble steps">;
def fconvergent_functions : Flag<["-"], "fconvergent-functions">, Group<f_Group>, Flags<[CC1Option]>,
HelpText<"Assume functions may be convergent">;
@@ -4854,8 +4854,6 @@ def emit_llvm_only : Flag<["-"], "emit-llvm-only">,
HelpText<"Build ASTs and convert to LLVM, discarding output">;
def emit_codegen_only : Flag<["-"], "emit-codegen-only">,
HelpText<"Generate machine code, but discard output">;
-def emit_obj : Flag<["-"], "emit-obj">,
- HelpText<"Emit native object files">;
def rewrite_test : Flag<["-"], "rewrite-test">,
HelpText<"Rewriter playground">;
def rewrite_macros : Flag<["-"], "rewrite-macros">,
@@ -5229,6 +5227,18 @@ def fsycl_is_device : Flag<["-"], "fsycl-is-device">,
} // let Flags = [CC1Option, NoDriverOption]
+//===----------------------------------------------------------------------===//
+// Frontend Options - cc1 + fc1
+//===----------------------------------------------------------------------===//
+let Flags = [CC1Option, FC1Option, NoDriverOption] in {
+let Group = Action_Group in {
+
+def emit_obj : Flag<["-"], "emit-obj">,
+ HelpText<"Emit native object files">;
+
+} // let Group = Action_Group
+} // let Flags = [CC1Option, FC1Option, NoDriverOption]
+
//===----------------------------------------------------------------------===//
// cc1as-only Options
//===----------------------------------------------------------------------===//
diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index 69f0841bb0c5..bf300d737991 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -28,17 +28,22 @@ void Flang::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output, const InputInfoList &Inputs,
const ArgList &Args, const char *LinkingOutput) const {
const auto &TC = getToolChain();
- const llvm::Triple &Triple = TC.getEffectiveTriple();
- const std::string &TripleStr = Triple.getTriple();
+ // TODO: Once code-generation is available, this will need to be commented
+ // out.
+ // const llvm::Triple &Triple = TC.getEffectiveTriple();
+ // const std::string &TripleStr = Triple.getTriple();
ArgStringList CmdArgs;
+ // Invoke ourselves in -fc1 mode.
CmdArgs.push_back("-fc1");
- // TODO: Eventually all actions will require a triple (e.g. `-triple
- // aarch64-unknown-linux-gnu`). However, `-triple` is currently not supported
- // by `flang-new -fc1`, so we only add it selectively to actions that we
- // don't support/execute just yet.
+ // TODO: Once code-generation is available, this will need to be commented
+ // out.
+ // Add the "effective" target triple.
+ // CmdArgs.push_back("-triple");
+ // CmdArgs.push_back(Args.MakeArgString(TripleStr));
+
if (isa<PreprocessJobAction>(JA)) {
if (C.getArgs().hasArg(options::OPT_test_io))
CmdArgs.push_back("-test-io");
@@ -61,8 +66,6 @@ void Flang::ConstructJob(Compilation &C, const JobAction &JA,
assert(false && "Unexpected output type!");
}
} else if (isa<AssembleJobAction>(JA)) {
- CmdArgs.push_back("-triple");
- CmdArgs.push_back(Args.MakeArgString(TripleStr));
CmdArgs.push_back("-emit-obj");
} else {
assert(false && "Unexpected action class for Flang tool.");
diff --git a/flang/include/flang/Frontend/FrontendActions.h b/flang/include/flang/Frontend/FrontendActions.h
index 3eea94b60bf5..9f125e3a91e9 100644
--- a/flang/include/flang/Frontend/FrontendActions.h
+++ b/flang/include/flang/Frontend/FrontendActions.h
@@ -29,6 +29,10 @@ class ParseSyntaxOnlyAction : public FrontendAction {
void ExecuteAction() override;
};
+class EmitObjAction : public FrontendAction {
+ void ExecuteAction() override;
+};
+
} // namespace Fortran::frontend
#endif // LLVM_FLANG_FRONTEND_FRONTENDACTIONS_H
diff --git a/flang/include/flang/Frontend/FrontendOptions.h b/flang/include/flang/Frontend/FrontendOptions.h
index d167f094955c..7add145971cf 100644
--- a/flang/include/flang/Frontend/FrontendOptions.h
+++ b/flang/include/flang/Frontend/FrontendOptions.h
@@ -28,6 +28,9 @@ enum ActionKind {
/// -fsyntax-only
ParseSyntaxOnly,
+ /// Emit a .o file.
+ EmitObj,
+
/// TODO: RunPreprocessor, EmitLLVM, EmitLLVMOnly,
/// EmitCodeGenOnly, EmitAssembly, (...)
};
diff --git a/flang/lib/Frontend/CompilerInvocation.cpp b/flang/lib/Frontend/CompilerInvocation.cpp
index df7fe44feb9c..57f097f189f9 100644
--- a/flang/lib/Frontend/CompilerInvocation.cpp
+++ b/flang/lib/Frontend/CompilerInvocation.cpp
@@ -99,9 +99,11 @@ static InputKind ParseFrontendArgs(FrontendOptions &opts,
case clang::driver::options::OPT_fsyntax_only:
opts.programAction_ = ParseSyntaxOnly;
break;
+ case clang::driver::options::OPT_emit_obj:
+ opts.programAction_ = EmitObj;
+ break;
// TODO:
- // case clang::driver::options::OPT_emit_obj:
// case calng::driver::options::OPT_emit_llvm:
// case clang::driver::options::OPT_emit_llvm_only:
// case clang::driver::options::OPT_emit_codegen_only:
diff --git a/flang/lib/Frontend/FrontendActions.cpp b/flang/lib/Frontend/FrontendActions.cpp
index acb9988611e6..a15793571bfb 100644
--- a/flang/lib/Frontend/FrontendActions.cpp
+++ b/flang/lib/Frontend/FrontendActions.cpp
@@ -111,3 +111,10 @@ void ParseSyntaxOnlyAction::ExecuteAction() {
ci.diagnostics().Report(DiagID) << GetCurrentFileOrBufferName();
}
}
+
+void EmitObjAction::ExecuteAction() {
+ CompilerInstance &ci = this->instance();
+ unsigned DiagID = ci.diagnostics().getCustomDiagID(
+ clang::DiagnosticsEngine::Error, "code-generation is not available yet");
+ ci.diagnostics().Report(DiagID);
+}
diff --git a/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp b/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
index 0315fd5dd2fb..50c9fca0b882 100644
--- a/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
+++ b/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
@@ -34,6 +34,8 @@ static std::unique_ptr<FrontendAction> CreateFrontendBaseAction(
break;
case ParseSyntaxOnly:
return std::make_unique<ParseSyntaxOnlyAction>();
+ case EmitObj:
+ return std::make_unique<EmitObjAction>();
break;
default:
break;
diff --git a/flang/test/Flang-Driver/code-gen.f90 b/flang/test/Flang-Driver/code-gen.f90
new file mode 100644
index 000000000000..53a1a52be7c0
--- /dev/null
+++ b/flang/test/Flang-Driver/code-gen.f90
@@ -0,0 +1,15 @@
+! RUN: not %flang-new %s 2>&1 | FileCheck %s --check-prefix=ERROR
+! RUN: not %flang-new -c %s 2>&1 | FileCheck %s --check-prefix=ERROR
+! RUN: not %flang-new -emit-obj %s 2>&1 | FileCheck %s --check-prefix=ERROR
+! RUN: not %flang-new -fc1 -emit-obj %s 2>&1 | FileCheck %s --check-prefix=ERROR
+
+! REQUIRES: new-flang-driver
+
+! Although code-generation is not yet available, we do have frontend actions
+! that correspond to `-c` and `-emit-obj`. For now these actions are just a
+! placeholder and running them leads to a driver error. This test makes sure
+! that these actions are indeed run (rather than `-c` or `-emit-obj` being
+! rejected earlier).
+! TODO: Replace this file with a proper test once code-generation is available.
+
+! ERROR: code-generation is not available yet
diff --git a/flang/test/Flang-Driver/driver-help-hidden.f90 b/flang/test/Flang-Driver/driver-help-hidden.f90
index 2b0e3162eb6f..c9913ff7e51d 100644
--- a/flang/test/Flang-Driver/driver-help-hidden.f90
+++ b/flang/test/Flang-Driver/driver-help-hidden.f90
@@ -19,6 +19,7 @@
! CHECK-EMPTY:
! CHECK-NEXT:OPTIONS:
! CHECK-NEXT: -### Print (but do not run) the commands to run for this compilation
+! CHECK-NEXT: -c Only run preprocess, compile, and assemble steps
! CHECK-NEXT: -D <macro>=<value> Define <macro> to <value> (or 1 if <value> omitted)
! CHECK-NEXT: -E Only run the preprocessor
! CHECK-NEXT: -fcolor-diagnostics Enable colors in diagnostics
diff --git a/flang/test/Flang-Driver/driver-help.f90 b/flang/test/Flang-Driver/driver-help.f90
index 69319253034c..e2fab5c73b5e 100644
--- a/flang/test/Flang-Driver/driver-help.f90
+++ b/flang/test/Flang-Driver/driver-help.f90
@@ -19,6 +19,7 @@
! HELP-EMPTY:
! HELP-NEXT:OPTIONS:
! HELP-NEXT: -### Print (but do not run) the commands to run for this compilation
+! HELP-NEXT: -c Only run preprocess, compile, and assemble steps
! HELP-NEXT: -D <macro>=<value> Define <macro> to <value> (or 1 if <value> omitted)
! HELP-NEXT: -E Only run the preprocessor
! HELP-NEXT: -fcolor-diagnostics Enable colors in diagnostics
@@ -35,6 +36,7 @@
! HELP-FC1-EMPTY:
! HELP-FC1-NEXT:OPTIONS:
! HELP-FC1-NEXT: -D <macro>=<value> Define <macro> to <value> (or 1 if <value> omitted)
+! HELP-FC1-NEXT: -emit-obj Emit native object files
! HELP-FC1-NEXT: -E Only run the preprocessor
! HELP-FC1-NEXT: -help Display available options
! HELP-FC1-NEXT: -o <file> Write output to <file>
diff --git a/flang/test/Flang-Driver/emit-obj.f90 b/flang/test/Flang-Driver/emit-obj.f90
deleted file mode 100644
index 09c1f84fb87c..000000000000
--- a/flang/test/Flang-Driver/emit-obj.f90
+++ /dev/null
@@ -1,14 +0,0 @@
-! RUN: not %flang-new %s 2>&1 | FileCheck %s --check-prefix=ERROR
-! RUN: not %flang-new -emit-obj %s 2>&1 | FileCheck %s --check-prefix=ERROR
-! RUN: not %flang-new -fc1 -emit-obj %s 2>&1 | FileCheck %s --check-prefix=ERROR-FC1
-
-! REQUIRES: new-flang-driver
-
-! By default (e.g. when no options like `-E` are passed) flang-new
-! creates a job that corresponds to `-emit-obj`. This option/action is
-! not yet supported. Verify that this is correctly reported as error.
-
-! ERROR: error: unknown argument: '-triple'
-! ERROR: error: unknown argument: '-emit-obj'
-
-! ERROR-FC1: error: unknown argument: '-emit-obj'
diff --git a/flang/test/Flang-Driver/phases.f90 b/flang/test/Flang-Driver/phases.f90
new file mode 100644
index 000000000000..62c54c73177e
--- /dev/null
+++ b/flang/test/Flang-Driver/phases.f90
@@ -0,0 +1,20 @@
+! RUN: %flang-new -E -ccc-print-phases %s 2>&1 | FileCheck %s --check-prefix=PP
+! RUN: %flang-new -fsyntax-only -ccc-print-phases %s 2>&1 | FileCheck %s --check-prefix=COMPILE
+! RUN: %flang-new -c -ccc-print-phases %s 2>&1 | FileCheck %s --check-prefix=EMIT_OBJ
+
+! REQUIRES: new-flang-driver
+
+! This test verifies the phase control in Flang compiler driver.
+
+! PP: +- 0: input, "{{.*}}phases.f90", f95-cpp-input
+! PP-NEXT: 1: preprocessor, {0}, f95
+
+! COMPILE: +- 0: input, "{{.*}}phases.f90", f95-cpp-input
+! COMPILE-NEXT: 1: preprocessor, {0}, f95
+! COMPILE-NEXT: 2: compiler, {1}, none
+
+! EMIT_OBJ: +- 0: input, "{{.*}}phases.f90", f95-cpp-input
+! EMIT_OBJ-NEXT: 1: preprocessor, {0}, f95
+! EMIT_OBJ-NEXT: 2: compiler, {1}, ir
+! EMIT_OBJ-NEXT: +- 3: backend, {2}, assembler
+! EMIT_OBJ-NEXT: 4: assembler, {3}, object
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