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Current Path: /usr/src/contrib/llvm-project/llvm/lib/Target/WebAssembly

usr / src / contrib / llvm-project / llvm / lib / Target / WebAssembly /

📁 ..
📁 AsmParser
📁 Disassembler
📁 MCTargetDesc
📄 README.txt(8.34 KB)
📁 TargetInfo
📄 WebAssembly.h(4.05 KB)
📄 WebAssembly.td(4.85 KB)
📄 WebAssemblyAddMissingPrototypes.cpp(5.41 KB)
📄 WebAssemblyArgumentMove.cpp(3.36 KB)
📄 WebAssemblyAsmPrinter.cpp(16.09 KB)
📄 WebAssemblyAsmPrinter.h(3.12 KB)
📄 WebAssemblyCFGSort.cpp(15.94 KB)
📄 WebAssemblyCFGStackify.cpp(55.56 KB)
📄 WebAssemblyDebugFixup.cpp(5.4 KB)
📄 WebAssemblyDebugValueManager.cpp(1.77 KB)
📄 WebAssemblyDebugValueManager.h(1.13 KB)
📄 WebAssemblyExceptionInfo.cpp(6.23 KB)
📄 WebAssemblyExceptionInfo.h(6.24 KB)
📄 WebAssemblyExplicitLocals.cpp(15.04 KB)
📄 WebAssemblyFastISel.cpp(40.39 KB)
📄 WebAssemblyFixBrTableDefaults.cpp(5.81 KB)
📄 WebAssemblyFixFunctionBitcasts.cpp(12.59 KB)
📄 WebAssemblyFixIrreducibleControlFlow.cpp(18.91 KB)
📄 WebAssemblyFrameLowering.cpp(12.68 KB)
📄 WebAssemblyFrameLowering.h(2.98 KB)
📄 WebAssemblyISD.def(1.17 KB)
📄 WebAssemblyISelDAGToDAG.cpp(9.08 KB)
📄 WebAssemblyISelLowering.cpp(68.59 KB)
📄 WebAssemblyISelLowering.h(5.85 KB)
📄 WebAssemblyInstrAtomics.td(48.5 KB)
📄 WebAssemblyInstrBulkMemory.td(2.84 KB)
📄 WebAssemblyInstrCall.td(3.21 KB)
📄 WebAssemblyInstrControl.td(7.93 KB)
📄 WebAssemblyInstrConv.td(14.1 KB)
📄 WebAssemblyInstrFloat.td(6.03 KB)
📄 WebAssemblyInstrFormats.td(3.1 KB)
📄 WebAssemblyInstrInfo.cpp(8.21 KB)
📄 WebAssemblyInstrInfo.h(2.63 KB)
📄 WebAssemblyInstrInfo.td(14.37 KB)
📄 WebAssemblyInstrInteger.td(6.05 KB)
📄 WebAssemblyInstrMemory.td(18.63 KB)
📄 WebAssemblyInstrRef.td(1.15 KB)
📄 WebAssemblyInstrSIMD.td(39.08 KB)
📄 WebAssemblyLateEHPrepare.cpp(14.57 KB)
📄 WebAssemblyLowerBrUnless.cpp(6.21 KB)
📄 WebAssemblyLowerEmscriptenEHSjLj.cpp(45.45 KB)
📄 WebAssemblyLowerGlobalDtors.cpp(7.79 KB)
📄 WebAssemblyMCInstLower.cpp(13.72 KB)
📄 WebAssemblyMCInstLower.h(1.63 KB)
📄 WebAssemblyMachineFunctionInfo.cpp(4.29 KB)
📄 WebAssemblyMachineFunctionInfo.h(6.75 KB)
📄 WebAssemblyMemIntrinsicResults.cpp(7.39 KB)
📄 WebAssemblyOptimizeLiveIntervals.cpp(4.61 KB)
📄 WebAssemblyOptimizeReturned.cpp(2.46 KB)
📄 WebAssemblyPeephole.cpp(6.33 KB)
📄 WebAssemblyPrepareForLiveIntervals.cpp(4.34 KB)
📄 WebAssemblyRegColoring.cpp(6.37 KB)
📄 WebAssemblyRegNumbering.cpp(3.86 KB)
📄 WebAssemblyRegStackify.cpp(38.22 KB)
📄 WebAssemblyRegisterInfo.cpp(6.21 KB)
📄 WebAssemblyRegisterInfo.h(1.74 KB)
📄 WebAssemblyRegisterInfo.td(2.83 KB)
📄 WebAssemblyReplacePhysRegs.cpp(3.89 KB)
📄 WebAssemblyRuntimeLibcallSignatures.cpp(33.82 KB)
📄 WebAssemblyRuntimeLibcallSignatures.h(1.37 KB)
📄 WebAssemblySelectionDAGInfo.cpp(2.57 KB)
📄 WebAssemblySelectionDAGInfo.h(1.94 KB)
📄 WebAssemblySetP2AlignOperands.cpp(3.32 KB)
📄 WebAssemblySubtarget.cpp(2.18 KB)
📄 WebAssemblySubtarget.h(3.88 KB)
📄 WebAssemblyTargetMachine.cpp(18.85 KB)
📄 WebAssemblyTargetMachine.h(2.29 KB)
📄 WebAssemblyTargetObjectFile.cpp(886 B)
📄 WebAssemblyTargetObjectFile.h(959 B)
📄 WebAssemblyTargetTransformInfo.cpp(2.9 KB)
📄 WebAssemblyTargetTransformInfo.h(2.5 KB)
📄 WebAssemblyUtilities.cpp(3.43 KB)
📄 WebAssemblyUtilities.h(1.8 KB)
📄 known_gcc_test_failures.txt(2.07 KB)

Editing: WebAssemblyDebugFixup.cpp

//===-- WebAssemblyDebugFixup.cpp - Debug Fixup ------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Several prior passes may "stackify" registers, here we ensure any references
/// in such registers in debug_value instructions become stack relative also.
/// This is done in a separate pass such that not all previous passes need to
/// track stack depth when values get stackified.
///
//===----------------------------------------------------------------------===//

#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssembly.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "WebAssemblyUtilities.h"
#include "llvm/ADT/SCCIterator.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;

#define DEBUG_TYPE "wasm-debug-fixup"

namespace {
class WebAssemblyDebugFixup final : public MachineFunctionPass {
  StringRef getPassName() const override { return "WebAssembly Debug Fixup"; }

void getAnalysisUsage(AnalysisUsage &AU) const override {
    AU.setPreservesCFG();
    MachineFunctionPass::getAnalysisUsage(AU);
  }

bool runOnMachineFunction(MachineFunction &MF) override;

public:
  static char ID; // Pass identification, replacement for typeid
  WebAssemblyDebugFixup() : MachineFunctionPass(ID) {}
};
} // end anonymous namespace

char WebAssemblyDebugFixup::ID = 0;
INITIALIZE_PASS(
    WebAssemblyDebugFixup, DEBUG_TYPE,
    "Ensures debug_value's that have been stackified become stack relative",
    false, false)

FunctionPass *llvm::createWebAssemblyDebugFixup() {
  return new WebAssemblyDebugFixup();
}

bool WebAssemblyDebugFixup::runOnMachineFunction(MachineFunction &MF) {
  LLVM_DEBUG(dbgs() << "********** Debug Fixup **********\n"
                       "********** Function: "
                    << MF.getName() << '\n');

WebAssemblyFunctionInfo &MFI = *MF.getInfo<WebAssemblyFunctionInfo>();
  const auto *TII = MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();

struct StackElem {
    unsigned Reg;
    MachineInstr *DebugValue;
  };
  std::vector<StackElem> Stack;
  for (MachineBasicBlock &MBB : MF) {
    // We may insert into this list.
    for (auto MII = MBB.begin(); MII != MBB.end(); ++MII) {
      MachineInstr &MI = *MII;
      if (MI.isDebugValue()) {
        auto &MO = MI.getOperand(0);
        // Also check if not a $noreg: likely a DBG_VALUE we just inserted.
        if (MO.isReg() && MO.getReg().isValid() &&
            MFI.isVRegStackified(MO.getReg())) {
          // Found a DBG_VALUE with a stackified register we will
          // change into a stack operand.
          // Search for register rather than assume it is on top (which it
          // typically is if it appears right after the def), since
          // DBG_VALUE's may shift under some circumstances.
          for (auto &Elem : reverse(Stack)) {
            if (MO.getReg() == Elem.Reg) {
              auto Depth = static_cast<unsigned>(&Elem - &Stack[0]);
              LLVM_DEBUG(dbgs() << "Debug Value VReg " << MO.getReg()
                                << " -> Stack Relative " << Depth << "\n");
              MO.ChangeToTargetIndex(WebAssembly::TI_OPERAND_STACK, Depth);
              // Save the DBG_VALUE instruction that defined this stackified
              // variable since later we need it to construct another one on
              // pop.
              Elem.DebugValue = &MI;
              break;
            }
          }
          // If the Reg was not found, we have a DBG_VALUE outside of its
          // def-use range, and we leave it unmodified as reg, which means
          // it will be culled later.
        }
      } else {
        // Track stack depth.
        for (MachineOperand &MO : reverse(MI.explicit_uses())) {
          if (MO.isReg() && MFI.isVRegStackified(MO.getReg())) {
            auto Prev = Stack.back();
            Stack.pop_back();
            assert(Prev.Reg == MO.getReg() &&
                   "WebAssemblyDebugFixup: Pop: Register not matched!");
            if (Prev.DebugValue) {
              // This stackified reg is a variable that started life at
              // Prev.DebugValue, so now that we're popping it we must insert
              // a $noreg DBG_VALUE for the variable to end it, right after
              // the current instruction.
              BuildMI(*Prev.DebugValue->getParent(), std::next(MII),
                      Prev.DebugValue->getDebugLoc(), TII->get(WebAssembly::DBG_VALUE), false,
                      Register(), Prev.DebugValue->getOperand(2).getMetadata(),
                      Prev.DebugValue->getOperand(3).getMetadata());
            }
          }
        }
        for (MachineOperand &MO : MI.defs()) {
          if (MO.isReg() && MFI.isVRegStackified(MO.getReg())) {
            Stack.push_back({MO.getReg(), nullptr});
          }
        }
      }
    }
    assert(Stack.empty() &&
           "WebAssemblyDebugFixup: Stack not empty at end of basic block!");
  }

return true;
}

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Editing: WebAssemblyDebugFixup.cpp

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