From fc0f4010bb4c4fb843218c6e3aa0112ffc67c299 Mon Sep 17 00:00:00 2001
From: Xiang1 Zhang <xiang1.zhang@intel.com>
Date: Mon, 14 Dec 2020 17:42:21 -0800
Subject: Revert "[Debugify] Support checking Machine IR debug info"

This reverts commit 57a3d9ec4a8c1422f07264bed9f12a4ea416707e.
---
 llvm/lib/CodeGen/MachineCheckDebugify.cpp | 126 ------------------------------
 1 file changed, 126 deletions(-)
 delete mode 100644 llvm/lib/CodeGen/MachineCheckDebugify.cpp

(limited to 'llvm/lib/CodeGen/MachineCheckDebugify.cpp')

diff --git a/llvm/lib/CodeGen/MachineCheckDebugify.cpp b/llvm/lib/CodeGen/MachineCheckDebugify.cpp
deleted file mode 100644
index bd7f0f8..0000000
--- a/llvm/lib/CodeGen/MachineCheckDebugify.cpp
+++ /dev/null
@@ -1,126 +0,0 @@
-//===- MachineCheckDebugify.cpp - Check debug info ------------------------===//
-//
-// 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 This checks debug info after mir-debugify (+ pass-to-test). Currently
-/// it simply checks the integrity of line info in DILocation and
-/// DILocalVariable which mir-debugifiy generated before.
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/IR/DebugInfo.h"
-#include "llvm/InitializePasses.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Transforms/Utils/Debugify.h"
-
-#define DEBUG_TYPE "mir-check-debugify"
-
-using namespace llvm;
-
-namespace {
-
-struct CheckDebugMachineModule : public ModulePass {
-  bool runOnModule(Module &M) override {
-    MachineModuleInfo &MMI =
-        getAnalysis<MachineModuleInfoWrapperPass>().getMMI();
-
-    NamedMDNode *NMD = M.getNamedMetadata("llvm.mir.debugify");
-    if (!NMD) {
-      errs() << "WARNING: Please run mir-debugify to generate "
-                "llvm.mir.debugify metadata first.\n";
-      return false;
-    }
-
-    auto getDebugifyOperand = [&](unsigned Idx) -> unsigned {
-      return mdconst::extract<ConstantInt>(NMD->getOperand(Idx)->getOperand(0))
-          ->getZExtValue();
-    };
-    assert(NMD->getNumOperands() == 2 &&
-           "llvm.mir.debugify should have exactly 2 operands!");
-    unsigned NumLines = getDebugifyOperand(0);
-    unsigned NumVars = getDebugifyOperand(1);
-    BitVector MissingLines{NumLines, true};
-    BitVector MissingVars{NumVars, true};
-
-    for (Function &F : M.functions()) {
-      MachineFunction *MF = MMI.getMachineFunction(F);
-      if (!MF)
-        continue;
-      for (MachineBasicBlock &MBB : *MF) {
-        // Find missing lines.
-        // TODO: Avoid meta instructions other than dbg_val.
-        for (MachineInstr &MI : MBB) {
-          if (MI.isDebugValue())
-            continue;
-          const DebugLoc DL = MI.getDebugLoc();
-          if (DL && DL.getLine() != 0) {
-            MissingLines.reset(DL.getLine() - 1);
-            continue;
-          }
-
-          if (!DL) {
-            errs() << "WARNING: Instruction with empty DebugLoc in function ";
-            errs() << F.getName() << " --";
-            MI.print(errs());
-          }
-        }
-
-        // Find missing variables.
-        // TODO: Handle DBG_INSTR_REF which is under an experimental option now.
-        for (MachineInstr &MI : MBB) {
-          if (!MI.isDebugValue())
-            continue;
-          const DILocalVariable *LocalVar = MI.getDebugVariable();
-          unsigned Var = ~0U;
-
-          (void)to_integer(LocalVar->getName(), Var, 10);
-          assert(Var <= NumVars && "Unexpected name for DILocalVariable");
-          MissingVars.reset(Var - 1);
-        }
-      }
-    }
-
-    bool Fail = false;
-    for (unsigned Idx : MissingLines.set_bits()) {
-      errs() << "WARNING: Missing line " << Idx + 1 << "\n";
-      Fail = true;
-    }
-
-    for (unsigned Idx : MissingVars.set_bits()) {
-      errs() << "WARNING: Missing variable " << Idx + 1 << "\n";
-      Fail = true;
-    }
-    errs() << "Machine IR debug info check: ";
-    errs() << (Fail ? "FAIL" : "PASS") << "\n";
-
-    return false;
-  }
-
-  CheckDebugMachineModule() : ModulePass(ID) {}
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.addRequired<MachineModuleInfoWrapperPass>();
-    AU.addPreserved<MachineModuleInfoWrapperPass>();
-    AU.setPreservesCFG();
-  }
-
-  static char ID; // Pass identification.
-};
-char CheckDebugMachineModule::ID = 0;
-
-} // end anonymous namespace
-
-INITIALIZE_PASS_BEGIN(CheckDebugMachineModule, DEBUG_TYPE,
-                      "Machine Check Debug Module", false, false)
-INITIALIZE_PASS_END(CheckDebugMachineModule, DEBUG_TYPE,
-                    "Machine Check Debug Module", false, false)
-
-ModulePass *llvm::createCheckDebugMachineModulePass() {
-  return new CheckDebugMachineModule();
-}
-- 
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