| Issue |
144992
|
| Summary |
Where and When does the outer customized pass plugin execute exactly?
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
TJU-PanYizhe
|
I used `PassInfoMixin` to implement my own pass plugin and load it with `clang-19 -fpass-plugin="build/libRCXLP.so" tests/test.c -S -emit-llvm -o tests/out/test_clang.ll` command.
I wonder Where and When does this pass plugin execute exactly?
- before all other passes implemented in llvm
- or after all other passes
- or ... ?
This is my pass plugin code
```C++
#include "RCXLP.h"
using namespace std;
using namespace llvm;
namespace
{
class MY_TEST_Pass : public PassInfoMixin<MY_TEST_Pass>
{
public:
vector<RCXLP::RIRInstruction> rir_instructions;
PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM)
{
cout << "My first pass plugin" << endl;
return PreservedAnalyses::all();
}
};
}
llvm::PassPluginLibraryInfo getMyPluginInfo()
{
return {
LLVM_PLUGIN_API_VERSION, "MY_TEST_Pass", "v0.1",
[](llvm::PassBuilder &PB)
{
PB.registerPipelineStartEPCallback(
[](ModulePassManager &MPM, OptimizationLevel Level)
{
FunctionPassManager FPM;
MPM.addPass(MY_TEST_Pass());
});
PB.registerPipelineParsingCallback(
[](
llvm::StringRef Name, llvm::ModulePassManager &MPM,
llvm::ArrayRef<llvm::PassBuilder::PipelineElement>)
{
if (Name == "my-test")
{
MPM.addPass(MY_TEST_Pass());
return true;
}
return false;
});
}};
}
extern "C" LLVM_ATTRIBUTE_WEAK ::llvm::PassPluginLibraryInfo
llvmGetPassPluginInfo()
{
return getMyPluginInfo();
}
```
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