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7f2eff792a
can be used by both the new pass manager and the old. This removes it from any of the virtual mess of the pass interfaces and lets it derive cleanly from the DominatorTreeBase<> template. In turn, tons of boilerplate interface can be nuked and it turns into a very straightforward extension of the base DominatorTree interface. The old analysis pass is now a simple wrapper. The names and style of this split should match the split between CallGraph and CallGraphWrapperPass. All of the users of DominatorTree have been updated to match using many of the same tricks as with CallGraph. The goal is that the common type remains the resulting DominatorTree rather than the pass. This will make subsequent work toward the new pass manager significantly easier. Also in numerous places things became cleaner because I switched from re-running the pass (!!! mid way through some other passes run!!!) to directly recomputing the domtree. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199104 91177308-0d34-0410-b5e6-96231b3b80d8
233 lines
7.7 KiB
C++
233 lines
7.7 KiB
C++
//===- llvm/unittests/IR/DominatorTreeTest.cpp - Constants unit 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/IR/Dominators.h"
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#include "llvm/Analysis/PostDominators.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/PassManager.h"
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#include "llvm/Support/SourceMgr.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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void initializeDPassPass(PassRegistry&);
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namespace {
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struct DPass : public FunctionPass {
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static char ID;
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virtual bool runOnFunction(Function &F) {
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DominatorTree *DT =
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&getAnalysis<DominatorTreeWrapperPass>().getDomTree();
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PostDominatorTree *PDT = &getAnalysis<PostDominatorTree>();
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Function::iterator FI = F.begin();
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BasicBlock *BB0 = FI++;
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BasicBlock::iterator BBI = BB0->begin();
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Instruction *Y1 = BBI++;
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Instruction *Y2 = BBI++;
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Instruction *Y3 = BBI++;
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BasicBlock *BB1 = FI++;
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BBI = BB1->begin();
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Instruction *Y4 = BBI++;
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BasicBlock *BB2 = FI++;
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BBI = BB2->begin();
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Instruction *Y5 = BBI++;
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BasicBlock *BB3 = FI++;
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BBI = BB3->begin();
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Instruction *Y6 = BBI++;
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Instruction *Y7 = BBI++;
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BasicBlock *BB4 = FI++;
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BBI = BB4->begin();
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Instruction *Y8 = BBI++;
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Instruction *Y9 = BBI++;
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// Reachability
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EXPECT_TRUE(DT->isReachableFromEntry(BB0));
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EXPECT_TRUE(DT->isReachableFromEntry(BB1));
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EXPECT_TRUE(DT->isReachableFromEntry(BB2));
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EXPECT_FALSE(DT->isReachableFromEntry(BB3));
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EXPECT_TRUE(DT->isReachableFromEntry(BB4));
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// BB dominance
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EXPECT_TRUE(DT->dominates(BB0, BB0));
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EXPECT_TRUE(DT->dominates(BB0, BB1));
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EXPECT_TRUE(DT->dominates(BB0, BB2));
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EXPECT_TRUE(DT->dominates(BB0, BB3));
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EXPECT_TRUE(DT->dominates(BB0, BB4));
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EXPECT_FALSE(DT->dominates(BB1, BB0));
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EXPECT_TRUE(DT->dominates(BB1, BB1));
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EXPECT_FALSE(DT->dominates(BB1, BB2));
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EXPECT_TRUE(DT->dominates(BB1, BB3));
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EXPECT_FALSE(DT->dominates(BB1, BB4));
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EXPECT_FALSE(DT->dominates(BB2, BB0));
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EXPECT_FALSE(DT->dominates(BB2, BB1));
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EXPECT_TRUE(DT->dominates(BB2, BB2));
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EXPECT_TRUE(DT->dominates(BB2, BB3));
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EXPECT_FALSE(DT->dominates(BB2, BB4));
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EXPECT_FALSE(DT->dominates(BB3, BB0));
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EXPECT_FALSE(DT->dominates(BB3, BB1));
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EXPECT_FALSE(DT->dominates(BB3, BB2));
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EXPECT_TRUE(DT->dominates(BB3, BB3));
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EXPECT_FALSE(DT->dominates(BB3, BB4));
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// BB proper dominance
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EXPECT_FALSE(DT->properlyDominates(BB0, BB0));
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EXPECT_TRUE(DT->properlyDominates(BB0, BB1));
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EXPECT_TRUE(DT->properlyDominates(BB0, BB2));
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EXPECT_TRUE(DT->properlyDominates(BB0, BB3));
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EXPECT_FALSE(DT->properlyDominates(BB1, BB0));
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EXPECT_FALSE(DT->properlyDominates(BB1, BB1));
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EXPECT_FALSE(DT->properlyDominates(BB1, BB2));
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EXPECT_TRUE(DT->properlyDominates(BB1, BB3));
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EXPECT_FALSE(DT->properlyDominates(BB2, BB0));
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EXPECT_FALSE(DT->properlyDominates(BB2, BB1));
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EXPECT_FALSE(DT->properlyDominates(BB2, BB2));
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EXPECT_TRUE(DT->properlyDominates(BB2, BB3));
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EXPECT_FALSE(DT->properlyDominates(BB3, BB0));
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EXPECT_FALSE(DT->properlyDominates(BB3, BB1));
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EXPECT_FALSE(DT->properlyDominates(BB3, BB2));
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EXPECT_FALSE(DT->properlyDominates(BB3, BB3));
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// Instruction dominance in the same reachable BB
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EXPECT_FALSE(DT->dominates(Y1, Y1));
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EXPECT_TRUE(DT->dominates(Y1, Y2));
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EXPECT_FALSE(DT->dominates(Y2, Y1));
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EXPECT_FALSE(DT->dominates(Y2, Y2));
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// Instruction dominance in the same unreachable BB
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EXPECT_TRUE(DT->dominates(Y6, Y6));
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EXPECT_TRUE(DT->dominates(Y6, Y7));
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EXPECT_TRUE(DT->dominates(Y7, Y6));
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EXPECT_TRUE(DT->dominates(Y7, Y7));
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// Invoke
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EXPECT_TRUE(DT->dominates(Y3, Y4));
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EXPECT_FALSE(DT->dominates(Y3, Y5));
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// Phi
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EXPECT_TRUE(DT->dominates(Y2, Y9));
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EXPECT_FALSE(DT->dominates(Y3, Y9));
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EXPECT_FALSE(DT->dominates(Y8, Y9));
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// Anything dominates unreachable
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EXPECT_TRUE(DT->dominates(Y1, Y6));
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EXPECT_TRUE(DT->dominates(Y3, Y6));
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// Unreachable doesn't dominate reachable
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EXPECT_FALSE(DT->dominates(Y6, Y1));
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// Instruction, BB dominance
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EXPECT_FALSE(DT->dominates(Y1, BB0));
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EXPECT_TRUE(DT->dominates(Y1, BB1));
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EXPECT_TRUE(DT->dominates(Y1, BB2));
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EXPECT_TRUE(DT->dominates(Y1, BB3));
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EXPECT_TRUE(DT->dominates(Y1, BB4));
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EXPECT_FALSE(DT->dominates(Y3, BB0));
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EXPECT_TRUE(DT->dominates(Y3, BB1));
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EXPECT_FALSE(DT->dominates(Y3, BB2));
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EXPECT_TRUE(DT->dominates(Y3, BB3));
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EXPECT_FALSE(DT->dominates(Y3, BB4));
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EXPECT_TRUE(DT->dominates(Y6, BB3));
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// Post dominance.
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EXPECT_TRUE(PDT->dominates(BB0, BB0));
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EXPECT_FALSE(PDT->dominates(BB1, BB0));
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EXPECT_FALSE(PDT->dominates(BB2, BB0));
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EXPECT_FALSE(PDT->dominates(BB3, BB0));
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EXPECT_TRUE(PDT->dominates(BB4, BB1));
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// Dominance descendants.
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SmallVector<BasicBlock *, 8> DominatedBBs, PostDominatedBBs;
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DT->getDescendants(BB0, DominatedBBs);
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PDT->getDescendants(BB0, PostDominatedBBs);
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EXPECT_EQ(DominatedBBs.size(), 4UL);
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EXPECT_EQ(PostDominatedBBs.size(), 1UL);
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// BB3 is unreachable. It should have no dominators nor postdominators.
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DominatedBBs.clear();
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PostDominatedBBs.clear();
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DT->getDescendants(BB3, DominatedBBs);
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DT->getDescendants(BB3, PostDominatedBBs);
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EXPECT_EQ(DominatedBBs.size(), 0UL);
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EXPECT_EQ(PostDominatedBBs.size(), 0UL);
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return false;
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequired<DominatorTreeWrapperPass>();
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AU.addRequired<PostDominatorTree>();
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}
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DPass() : FunctionPass(ID) {
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initializeDPassPass(*PassRegistry::getPassRegistry());
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}
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};
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char DPass::ID = 0;
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Module* makeLLVMModule(DPass *P) {
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const char *ModuleStrig =
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"declare i32 @g()\n" \
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"define void @f(i32 %x) {\n" \
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"bb0:\n" \
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" %y1 = add i32 %x, 1\n" \
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" %y2 = add i32 %x, 1\n" \
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" %y3 = invoke i32 @g() to label %bb1 unwind label %bb2\n" \
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"bb1:\n" \
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" %y4 = add i32 %x, 1\n" \
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" br label %bb4\n" \
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"bb2:\n" \
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" %y5 = landingpad i32 personality i32 ()* @g\n" \
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" cleanup\n" \
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" br label %bb4\n" \
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"bb3:\n" \
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" %y6 = add i32 %x, 1\n" \
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" %y7 = add i32 %x, 1\n" \
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" ret void\n" \
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"bb4:\n" \
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" %y8 = phi i32 [0, %bb2], [%y4, %bb1]\n"
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" %y9 = phi i32 [0, %bb2], [%y4, %bb1]\n"
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" ret void\n" \
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"}\n";
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LLVMContext &C = getGlobalContext();
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SMDiagnostic Err;
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return ParseAssemblyString(ModuleStrig, NULL, Err, C);
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}
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TEST(DominatorTree, Unreachable) {
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DPass *P = new DPass();
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OwningPtr<Module> M(makeLLVMModule(P));
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PassManager Passes;
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Passes.add(P);
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Passes.run(*M);
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}
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}
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}
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INITIALIZE_PASS_BEGIN(DPass, "dpass", "dpass", false, false)
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INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
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INITIALIZE_PASS_DEPENDENCY(PostDominatorTree)
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INITIALIZE_PASS_END(DPass, "dpass", "dpass", false, false)
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