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701117320d
Summary: `getEHScopeMembership()` function is used not only for funclet-based EHs; they apply to all EH schemes that use the scoped IR (catchpad/cleanuppad/...). D47005 (rL333045) changed some of the uses of the term 'funclet' to 'EH scopes' in case they apply to all scoped EH, and this fixes more of them. For `FuncletLayout` pass, I left it as is because the pass is only used for funclet-based EH. Reviewers: majnemer Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D47611 llvm-svn: 333711
63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
//===-- FuncletLayout.cpp - Contiguously lay out funclets -----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements basic block placement transformations which result in
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// funclets being contiguous.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/Analysis.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/Passes.h"
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using namespace llvm;
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#define DEBUG_TYPE "funclet-layout"
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namespace {
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class FuncletLayout : public MachineFunctionPass {
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public:
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static char ID; // Pass identification, replacement for typeid
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FuncletLayout() : MachineFunctionPass(ID) {
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initializeFuncletLayoutPass(*PassRegistry::getPassRegistry());
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}
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bool runOnMachineFunction(MachineFunction &F) override;
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MachineFunctionProperties getRequiredProperties() const override {
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return MachineFunctionProperties().set(
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MachineFunctionProperties::Property::NoVRegs);
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}
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};
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}
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char FuncletLayout::ID = 0;
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char &llvm::FuncletLayoutID = FuncletLayout::ID;
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INITIALIZE_PASS(FuncletLayout, DEBUG_TYPE,
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"Contiguously Lay Out Funclets", false, false)
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bool FuncletLayout::runOnMachineFunction(MachineFunction &F) {
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// Even though this gets information from getEHScopeMembership(), this pass is
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// only necessary for funclet-based EH personalities, in which these EH scopes
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// are outlined at the end.
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DenseMap<const MachineBasicBlock *, int> FuncletMembership =
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getEHScopeMembership(F);
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if (FuncletMembership.empty())
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return false;
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F.sort([&](MachineBasicBlock &X, MachineBasicBlock &Y) {
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auto FuncletX = FuncletMembership.find(&X);
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auto FuncletY = FuncletMembership.find(&Y);
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assert(FuncletX != FuncletMembership.end());
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assert(FuncletY != FuncletMembership.end());
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return FuncletX->second < FuncletY->second;
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});
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// Conservatively assume we changed something.
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return true;
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}
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