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45edf51a57
This will be used in LCSSA to speed up the canonicalization. Differential Revision: https://reviews.llvm.org/D31694 llvm-svn: 299660
75 lines
1.6 KiB
C++
75 lines
1.6 KiB
C++
//=== llvm/unittest/ADT/BreadthFirstIteratorTest.cpp - BFS iterator tests -===//
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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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#include "llvm/ADT/BreadthFirstIterator.h"
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#include "TestGraph.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace llvm {
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TEST(BreadthFristIteratorTest, Basic) {
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typedef bf_iterator<Graph<4>> BFIter;
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Graph<4> G;
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G.AddEdge(0, 1);
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G.AddEdge(0, 2);
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G.AddEdge(1, 3);
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auto It = BFIter::begin(G);
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auto End = BFIter::end(G);
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EXPECT_EQ(It.getLevel(), 0U);
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EXPECT_EQ(*It, G.AccessNode(0));
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++It;
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EXPECT_EQ(It.getLevel(), 1U);
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EXPECT_EQ(*It, G.AccessNode(1));
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++It;
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EXPECT_EQ(It.getLevel(), 1U);
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EXPECT_EQ(*It, G.AccessNode(2));
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++It;
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EXPECT_EQ(It.getLevel(), 2U);
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EXPECT_EQ(*It, G.AccessNode(3));
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++It;
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EXPECT_EQ(It, End);
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}
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TEST(BreadthFristIteratorTest, Cycle) {
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typedef bf_iterator<Graph<4>> BFIter;
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Graph<4> G;
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G.AddEdge(0, 1);
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G.AddEdge(1, 0);
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G.AddEdge(1, 2);
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G.AddEdge(2, 1);
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G.AddEdge(2, 1);
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G.AddEdge(2, 3);
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G.AddEdge(3, 2);
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G.AddEdge(3, 1);
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G.AddEdge(3, 0);
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auto It = BFIter::begin(G);
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auto End = BFIter::end(G);
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EXPECT_EQ(It.getLevel(), 0U);
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EXPECT_EQ(*It, G.AccessNode(0));
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++It;
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EXPECT_EQ(It.getLevel(), 1U);
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EXPECT_EQ(*It, G.AccessNode(1));
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++It;
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EXPECT_EQ(It.getLevel(), 2U);
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EXPECT_EQ(*It, G.AccessNode(2));
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++It;
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EXPECT_EQ(It.getLevel(), 3U);
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EXPECT_EQ(*It, G.AccessNode(3));
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++It;
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EXPECT_EQ(It, End);
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}
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} // end namespace llvm
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