LCOV - code coverage report
Current view: top level - include/llvm/Analysis - DivergenceAnalysis.h (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 6 6 100.0 %
Date: 2017-09-14 15:23:50 Functions: 2 3 66.7 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===- llvm/Analysis/DivergenceAnalysis.h - Divergence Analysis -*- C++ -*-===//
       2             : //
       3             : //                     The LLVM Compiler Infrastructure
       4             : //
       5             : // This file is distributed under the University of Illinois Open Source
       6             : // License. See LICENSE.TXT for details.
       7             : //
       8             : //===----------------------------------------------------------------------===//
       9             : //
      10             : // The divergence analysis is an LLVM pass which can be used to find out
      11             : // if a branch instruction in a GPU program is divergent or not. It can help
      12             : // branch optimizations such as jump threading and loop unswitching to make
      13             : // better decisions.
      14             : //
      15             : //===----------------------------------------------------------------------===//
      16             : 
      17             : #include "llvm/ADT/DenseSet.h"
      18             : #include "llvm/IR/Function.h"
      19             : #include "llvm/Pass.h"
      20             : 
      21             : namespace llvm {
      22             : class Value;
      23       17655 : class DivergenceAnalysis : public FunctionPass {
      24             : public:
      25             :   static char ID;
      26             : 
      27       17751 :   DivergenceAnalysis() : FunctionPass(ID) {
      28        5917 :     initializeDivergenceAnalysisPass(*PassRegistry::getPassRegistry());
      29        5917 :   }
      30             : 
      31             :   void getAnalysisUsage(AnalysisUsage &AU) const override;
      32             : 
      33             :   bool runOnFunction(Function &F) override;
      34             : 
      35             :   // Print all divergent branches in the function.
      36             :   void print(raw_ostream &OS, const Module *) const override;
      37             : 
      38             :   // Returns true if V is divergent.
      39       30922 :   bool isDivergent(const Value *V) const { return DivergentValues.count(V); }
      40             : 
      41             :   // Returns true if V is uniform/non-divergent.
      42       15459 :   bool isUniform(const Value *V) const { return !isDivergent(V); }
      43             : 
      44             : private:
      45             :   // Stores all divergent values.
      46             :   DenseSet<const Value *> DivergentValues;
      47             : };
      48             : } // End llvm namespace

Generated by: LCOV version 1.13