You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
2.0 KiB
60 lines
2.0 KiB
4 months ago
|
//===-- FuncletLayout.cpp - Contiguously lay out funclets -----------------===//
|
||
|
|
//
|
||
|
|
// The LLVM Compiler Infrastructure
|
||
|
|
//
|
||
|
|
// This file is distributed under the University of Illinois Open Source
|
||
|
|
// License. See LICENSE.TXT for details.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// This file implements basic block placement transformations which result in
|
||
|
|
// funclets being contiguous.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
#include "llvm/CodeGen/Passes.h"
|
||
|
|
#include "llvm/CodeGen/Analysis.h"
|
||
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
||
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
||
|
|
using namespace llvm;
|
||
|
|
|
||
|
|
#define DEBUG_TYPE "funclet-layout"
|
||
|
|
|
||
|
|
namespace {
|
||
|
|
class FuncletLayout : public MachineFunctionPass {
|
||
|
|
public:
|
||
|
|
static char ID; // Pass identification, replacement for typeid
|
||
|
|
FuncletLayout() : MachineFunctionPass(ID) {
|
||
|
|
initializeFuncletLayoutPass(*PassRegistry::getPassRegistry());
|
||
|
|
}
|
||
|
|
|
||
|
|
bool runOnMachineFunction(MachineFunction &F) override;
|
||
|
|
MachineFunctionProperties getRequiredProperties() const override {
|
||
|
|
return MachineFunctionProperties().set(
|
||
|
|
MachineFunctionProperties::Property::AllVRegsAllocated);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
char FuncletLayout::ID = 0;
|
||
|
|
char &llvm::FuncletLayoutID = FuncletLayout::ID;
|
||
|
|
INITIALIZE_PASS(FuncletLayout, "funclet-layout",
|
||
|
|
"Contiguously Lay Out Funclets", false, false)
|
||
|
|
|
||
|
|
bool FuncletLayout::runOnMachineFunction(MachineFunction &F) {
|
||
|
|
DenseMap<const MachineBasicBlock *, int> FuncletMembership =
|
||
|
|
getFuncletMembership(F);
|
||
|
|
if (FuncletMembership.empty())
|
||
|
|
return false;
|
||
|
|
|
||
|
|
F.sort([&](MachineBasicBlock &X, MachineBasicBlock &Y) {
|
||
|
|
auto FuncletX = FuncletMembership.find(&X);
|
||
|
|
auto FuncletY = FuncletMembership.find(&Y);
|
||
|
|
assert(FuncletX != FuncletMembership.end());
|
||
|
|
assert(FuncletY != FuncletMembership.end());
|
||
|
|
return FuncletX->second < FuncletY->second;
|
||
|
|
});
|
||
|
|
|
||
|
|
// Conservatively assume we changed something.
|
||
|
|
return true;
|
||
|
|
}
|