llvm/lib/TableGen/TGTimer.cpp

   1 //===- TGTimer.cpp - TableGen Timer implementation --------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Implement the tablegen timer class.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "llvm/TableGen/TGTimer.h"
  14 using namespace llvm;
  15
  16 // These functions implement the phase timing facility. Starting a timer
  17 // when one is already running stops the running one.
  18 void TGTimer::startTimer(StringRef Name) {
  19   if (!TimingGroup)
  20     return;
  21   if (LastTimer && LastTimer->isRunning()) {
  22     LastTimer->stopTimer();
  23     if (BackendTimer) {
  24       LastTimer->clear();
  25       BackendTimer = false;
  26     }
  27   }
  28
  29   LastTimer = std::make_unique<Timer>("", Name, *TimingGroup);
  30   LastTimer->startTimer();
  31 }
  32
  33 void TGTimer::stopTimer() {
  34   if (!TimingGroup)
  35     return;
  36
  37   assert(LastTimer && "No phase timer was started");
  38   LastTimer->stopTimer();
  39 }
  40
  41 void TGTimer::startBackendTimer(StringRef Name) {
  42   if (!TimingGroup)
  43     return;
  44
  45   startTimer(Name);
  46   BackendTimer = true;
  47 }
  48
  49 void TGTimer::stopBackendTimer() {
  50   if (!TimingGroup || !BackendTimer)
  51     return;
  52   stopTimer();
  53   BackendTimer = false;
  54 }