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/*========================== begin_copyright_notice ============================
Copyright (C) 2025 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "GenX.h"
#include "llvm/IR/InstVisitor.h"
#define DEBUG_TYPE "GENX_UNFREEZE"
using namespace llvm;
namespace {
class GenXUnfreeze : public FunctionPass, public InstVisitor<GenXUnfreeze> {
bool Changed = false;
public:
static char ID;
explicit GenXUnfreeze() : FunctionPass(ID) {}
StringRef getPassName() const override { return "GenX unfreeze"; }
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesCFG();
}
void visitFreezeInst(FreezeInst &FI);
bool runOnFunction(Function &F) override;
};
} // namespace
char GenXUnfreeze::ID = 0;
namespace llvm {
void initializeGenXUnfreezePass(PassRegistry &);
} // namespace llvm
INITIALIZE_PASS_BEGIN(GenXUnfreeze, "GenXUnfreeze", "GenXUnfreeze", false,
false)
INITIALIZE_PASS_END(GenXUnfreeze, "GenXUnfreeze", "GenXUnfreeze", false, false)
FunctionPass *llvm::createGenXUnfreezePass() {
initializeGenXUnfreezePass(*PassRegistry::getPassRegistry());
return new GenXUnfreeze();
}
void GenXUnfreeze::visitFreezeInst(FreezeInst &FI) {
if (FI.use_empty())
return;
auto *V = FI.getOperand(0);
FI.replaceAllUsesWith(V);
FI.eraseFromParent();
Changed = true;
}
bool GenXUnfreeze::runOnFunction(Function &F) {
visit(F);
return Changed;
}
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