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[flang][Driver] Add support for -mllvm -print-pipeline-passes #106141

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Merged
merged 3 commits into from
Aug 29, 2024
Merged

[flang][Driver] Add support for -mllvm -print-pipeline-passes #106141

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9b83df9
[flang][Driver] Add support for -mllvm -print-pipeline-passes
Aug 26, 2024
a8d69e7
Remove unnecessary target triple from test invocation.
Aug 27, 2024
81d4f14
Add comment as a reminder that -mllvm -print-pipeline-passes should e…
Aug 29, 2024
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16 changes: 16 additions & 0 deletions flang/lib/Frontend/FrontendActions.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,10 @@

#include "flang/Tools/CLOptions.inc"

namespace llvm {
extern cl::opt<bool> PrintPipelinePasses;
} // namespace llvm

using namespace Fortran::frontend;

// Declare plugin extension function declarations.
Expand Down Expand Up @@ -1015,6 +1019,18 @@ void CodeGenAction::runOptimizationPipeline(llvm::raw_pwrite_stream &os) {
else if (action == BackendActionTy::Backend_EmitLL)
mpm.addPass(llvm::PrintModulePass(os));

// Print a textual, '-passes=' compatible, representation of pipeline if
// requested. In this case, don't run the passes. This mimics the behavior of
// clang.
if (llvm::PrintPipelinePasses) {
mpm.printPipeline(llvm::outs(), [&pic](llvm::StringRef className) {
auto passName = pic.getPassNameForClassName(className);
return passName.empty() ? className : passName;
});
llvm::outs() << "\n";
return;
}

// Run the passes.
mpm.run(*llvmModule, mam);
}
Expand Down
10 changes: 10 additions & 0 deletions flang/test/Driver/print-pipeline-passes.f90
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@@ -0,0 +1,10 @@
! Test that -print-pipeline-passes works in flang

! RUN: %flang_fc1 -triple x86_64-unknown-linux-gnu -emit-llvm-bc -o /dev/null -mllvm -print-pipeline-passes -O0 %s 2>&1 | FileCheck %s

! Don't try to check all passes, just a few to make sure that something is
! actually printed.
! CHECK: always-inline
! CHECK-SAME: annotation-remarks

end program
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