mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-09 04:36:49 +00:00
97add46aee
When a block is unreachable, asking its dom tree descendants should return the empty set. However, the computation of the descendants was causing a segmentation fault because the dom tree node we get from the basic block is initially NULL. Fixed by adding a test for a valid dom tree node before we iterate. The patch also adds some unit tests to the existing dom tree tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196099 91177308-0d34-0410-b5e6-96231b3b80d8
232 lines
7.7 KiB
C++
232 lines
7.7 KiB
C++
//===- llvm/unittests/IR/DominatorTreeTest.cpp - Constants unit tests -----===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/Dominators.h"
|
|
#include "llvm/Analysis/PostDominators.h"
|
|
#include "llvm/Assembly/Parser.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/PassManager.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace llvm {
|
|
void initializeDPassPass(PassRegistry&);
|
|
|
|
namespace {
|
|
struct DPass : public FunctionPass {
|
|
static char ID;
|
|
virtual bool runOnFunction(Function &F) {
|
|
DominatorTree *DT = &getAnalysis<DominatorTree>();
|
|
PostDominatorTree *PDT = &getAnalysis<PostDominatorTree>();
|
|
Function::iterator FI = F.begin();
|
|
|
|
BasicBlock *BB0 = FI++;
|
|
BasicBlock::iterator BBI = BB0->begin();
|
|
Instruction *Y1 = BBI++;
|
|
Instruction *Y2 = BBI++;
|
|
Instruction *Y3 = BBI++;
|
|
|
|
BasicBlock *BB1 = FI++;
|
|
BBI = BB1->begin();
|
|
Instruction *Y4 = BBI++;
|
|
|
|
BasicBlock *BB2 = FI++;
|
|
BBI = BB2->begin();
|
|
Instruction *Y5 = BBI++;
|
|
|
|
BasicBlock *BB3 = FI++;
|
|
BBI = BB3->begin();
|
|
Instruction *Y6 = BBI++;
|
|
Instruction *Y7 = BBI++;
|
|
|
|
BasicBlock *BB4 = FI++;
|
|
BBI = BB4->begin();
|
|
Instruction *Y8 = BBI++;
|
|
Instruction *Y9 = BBI++;
|
|
|
|
// Reachability
|
|
EXPECT_TRUE(DT->isReachableFromEntry(BB0));
|
|
EXPECT_TRUE(DT->isReachableFromEntry(BB1));
|
|
EXPECT_TRUE(DT->isReachableFromEntry(BB2));
|
|
EXPECT_FALSE(DT->isReachableFromEntry(BB3));
|
|
EXPECT_TRUE(DT->isReachableFromEntry(BB4));
|
|
|
|
// BB dominance
|
|
EXPECT_TRUE(DT->dominates(BB0, BB0));
|
|
EXPECT_TRUE(DT->dominates(BB0, BB1));
|
|
EXPECT_TRUE(DT->dominates(BB0, BB2));
|
|
EXPECT_TRUE(DT->dominates(BB0, BB3));
|
|
EXPECT_TRUE(DT->dominates(BB0, BB4));
|
|
|
|
EXPECT_FALSE(DT->dominates(BB1, BB0));
|
|
EXPECT_TRUE(DT->dominates(BB1, BB1));
|
|
EXPECT_FALSE(DT->dominates(BB1, BB2));
|
|
EXPECT_TRUE(DT->dominates(BB1, BB3));
|
|
EXPECT_FALSE(DT->dominates(BB1, BB4));
|
|
|
|
EXPECT_FALSE(DT->dominates(BB2, BB0));
|
|
EXPECT_FALSE(DT->dominates(BB2, BB1));
|
|
EXPECT_TRUE(DT->dominates(BB2, BB2));
|
|
EXPECT_TRUE(DT->dominates(BB2, BB3));
|
|
EXPECT_FALSE(DT->dominates(BB2, BB4));
|
|
|
|
EXPECT_FALSE(DT->dominates(BB3, BB0));
|
|
EXPECT_FALSE(DT->dominates(BB3, BB1));
|
|
EXPECT_FALSE(DT->dominates(BB3, BB2));
|
|
EXPECT_TRUE(DT->dominates(BB3, BB3));
|
|
EXPECT_FALSE(DT->dominates(BB3, BB4));
|
|
|
|
// BB proper dominance
|
|
EXPECT_FALSE(DT->properlyDominates(BB0, BB0));
|
|
EXPECT_TRUE(DT->properlyDominates(BB0, BB1));
|
|
EXPECT_TRUE(DT->properlyDominates(BB0, BB2));
|
|
EXPECT_TRUE(DT->properlyDominates(BB0, BB3));
|
|
|
|
EXPECT_FALSE(DT->properlyDominates(BB1, BB0));
|
|
EXPECT_FALSE(DT->properlyDominates(BB1, BB1));
|
|
EXPECT_FALSE(DT->properlyDominates(BB1, BB2));
|
|
EXPECT_TRUE(DT->properlyDominates(BB1, BB3));
|
|
|
|
EXPECT_FALSE(DT->properlyDominates(BB2, BB0));
|
|
EXPECT_FALSE(DT->properlyDominates(BB2, BB1));
|
|
EXPECT_FALSE(DT->properlyDominates(BB2, BB2));
|
|
EXPECT_TRUE(DT->properlyDominates(BB2, BB3));
|
|
|
|
EXPECT_FALSE(DT->properlyDominates(BB3, BB0));
|
|
EXPECT_FALSE(DT->properlyDominates(BB3, BB1));
|
|
EXPECT_FALSE(DT->properlyDominates(BB3, BB2));
|
|
EXPECT_FALSE(DT->properlyDominates(BB3, BB3));
|
|
|
|
// Instruction dominance in the same reachable BB
|
|
EXPECT_FALSE(DT->dominates(Y1, Y1));
|
|
EXPECT_TRUE(DT->dominates(Y1, Y2));
|
|
EXPECT_FALSE(DT->dominates(Y2, Y1));
|
|
EXPECT_FALSE(DT->dominates(Y2, Y2));
|
|
|
|
// Instruction dominance in the same unreachable BB
|
|
EXPECT_TRUE(DT->dominates(Y6, Y6));
|
|
EXPECT_TRUE(DT->dominates(Y6, Y7));
|
|
EXPECT_TRUE(DT->dominates(Y7, Y6));
|
|
EXPECT_TRUE(DT->dominates(Y7, Y7));
|
|
|
|
// Invoke
|
|
EXPECT_TRUE(DT->dominates(Y3, Y4));
|
|
EXPECT_FALSE(DT->dominates(Y3, Y5));
|
|
|
|
// Phi
|
|
EXPECT_TRUE(DT->dominates(Y2, Y9));
|
|
EXPECT_FALSE(DT->dominates(Y3, Y9));
|
|
EXPECT_FALSE(DT->dominates(Y8, Y9));
|
|
|
|
// Anything dominates unreachable
|
|
EXPECT_TRUE(DT->dominates(Y1, Y6));
|
|
EXPECT_TRUE(DT->dominates(Y3, Y6));
|
|
|
|
// Unreachable doesn't dominate reachable
|
|
EXPECT_FALSE(DT->dominates(Y6, Y1));
|
|
|
|
// Instruction, BB dominance
|
|
EXPECT_FALSE(DT->dominates(Y1, BB0));
|
|
EXPECT_TRUE(DT->dominates(Y1, BB1));
|
|
EXPECT_TRUE(DT->dominates(Y1, BB2));
|
|
EXPECT_TRUE(DT->dominates(Y1, BB3));
|
|
EXPECT_TRUE(DT->dominates(Y1, BB4));
|
|
|
|
EXPECT_FALSE(DT->dominates(Y3, BB0));
|
|
EXPECT_TRUE(DT->dominates(Y3, BB1));
|
|
EXPECT_FALSE(DT->dominates(Y3, BB2));
|
|
EXPECT_TRUE(DT->dominates(Y3, BB3));
|
|
EXPECT_FALSE(DT->dominates(Y3, BB4));
|
|
|
|
EXPECT_TRUE(DT->dominates(Y6, BB3));
|
|
|
|
// Post dominance.
|
|
EXPECT_TRUE(PDT->dominates(BB0, BB0));
|
|
EXPECT_FALSE(PDT->dominates(BB1, BB0));
|
|
EXPECT_FALSE(PDT->dominates(BB2, BB0));
|
|
EXPECT_FALSE(PDT->dominates(BB3, BB0));
|
|
EXPECT_TRUE(PDT->dominates(BB4, BB1));
|
|
|
|
// Dominance descendants.
|
|
SmallVector<BasicBlock *, 8> DominatedBBs, PostDominatedBBs;
|
|
|
|
DT->getDescendants(BB0, DominatedBBs);
|
|
PDT->getDescendants(BB0, PostDominatedBBs);
|
|
EXPECT_EQ(DominatedBBs.size(), 4UL);
|
|
EXPECT_EQ(PostDominatedBBs.size(), 1UL);
|
|
|
|
// BB3 is unreachable. It should have no dominators nor postdominators.
|
|
DominatedBBs.clear();
|
|
PostDominatedBBs.clear();
|
|
DT->getDescendants(BB3, DominatedBBs);
|
|
DT->getDescendants(BB3, PostDominatedBBs);
|
|
EXPECT_EQ(DominatedBBs.size(), 0UL);
|
|
EXPECT_EQ(PostDominatedBBs.size(), 0UL);
|
|
|
|
return false;
|
|
}
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.addRequired<DominatorTree>();
|
|
AU.addRequired<PostDominatorTree>();
|
|
}
|
|
DPass() : FunctionPass(ID) {
|
|
initializeDPassPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
};
|
|
char DPass::ID = 0;
|
|
|
|
|
|
Module* makeLLVMModule(DPass *P) {
|
|
const char *ModuleStrig =
|
|
"declare i32 @g()\n" \
|
|
"define void @f(i32 %x) {\n" \
|
|
"bb0:\n" \
|
|
" %y1 = add i32 %x, 1\n" \
|
|
" %y2 = add i32 %x, 1\n" \
|
|
" %y3 = invoke i32 @g() to label %bb1 unwind label %bb2\n" \
|
|
"bb1:\n" \
|
|
" %y4 = add i32 %x, 1\n" \
|
|
" br label %bb4\n" \
|
|
"bb2:\n" \
|
|
" %y5 = landingpad i32 personality i32 ()* @g\n" \
|
|
" cleanup\n" \
|
|
" br label %bb4\n" \
|
|
"bb3:\n" \
|
|
" %y6 = add i32 %x, 1\n" \
|
|
" %y7 = add i32 %x, 1\n" \
|
|
" ret void\n" \
|
|
"bb4:\n" \
|
|
" %y8 = phi i32 [0, %bb2], [%y4, %bb1]\n"
|
|
" %y9 = phi i32 [0, %bb2], [%y4, %bb1]\n"
|
|
" ret void\n" \
|
|
"}\n";
|
|
LLVMContext &C = getGlobalContext();
|
|
SMDiagnostic Err;
|
|
return ParseAssemblyString(ModuleStrig, NULL, Err, C);
|
|
}
|
|
|
|
TEST(DominatorTree, Unreachable) {
|
|
DPass *P = new DPass();
|
|
OwningPtr<Module> M(makeLLVMModule(P));
|
|
PassManager Passes;
|
|
Passes.add(P);
|
|
Passes.run(*M);
|
|
}
|
|
}
|
|
}
|
|
|
|
INITIALIZE_PASS_BEGIN(DPass, "dpass", "dpass", false, false)
|
|
INITIALIZE_PASS_DEPENDENCY(DominatorTree)
|
|
INITIALIZE_PASS_DEPENDENCY(PostDominatorTree)
|
|
INITIALIZE_PASS_END(DPass, "dpass", "dpass", false, false)
|