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https://github.com/c64scene-ar/llvm-6502.git
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bc65a8d518
are part of the core IR library in order to support dumping and other basic functionality. Rename the 'Assembly' include directory to 'AsmParser' to match the library name and the only functionality left their -- printing has been in the core IR library for quite some time. Update all of the #includes to match. All of this started because I wanted to have the layering in good shape before I started adding support for printing LLVM IR using the new pass infrastructure, and commandline support for the new pass infrastructure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198688 91177308-0d34-0410-b5e6-96231b3b80d8
377 lines
10 KiB
C++
377 lines
10 KiB
C++
//===- CFGTest.cpp - CFG 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/Analysis/CFG.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/Analysis/Dominators.h"
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#include "llvm/Analysis/LoopInfo.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/IR/Function.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/Pass.h"
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#include "llvm/PassManager.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/InstIterator.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 {
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// This fixture assists in running the isPotentiallyReachable utility four ways
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// and ensuring it produces the correct answer each time.
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class IsPotentiallyReachableTest : public testing::Test {
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protected:
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void ParseAssembly(const char *Assembly) {
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M.reset(new Module("Module", getGlobalContext()));
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SMDiagnostic Error;
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bool Parsed = ParseAssemblyString(Assembly, M.get(),
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Error, M->getContext()) == M.get();
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std::string errMsg;
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raw_string_ostream os(errMsg);
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Error.print("", os);
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if (!Parsed) {
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// A failure here means that the test itself is buggy.
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report_fatal_error(os.str().c_str());
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}
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Function *F = M->getFunction("test");
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if (F == NULL)
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report_fatal_error("Test must have a function named @test");
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A = B = NULL;
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for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
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if (I->hasName()) {
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if (I->getName() == "A")
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A = &*I;
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else if (I->getName() == "B")
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B = &*I;
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}
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}
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if (A == NULL)
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report_fatal_error("@test must have an instruction %A");
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if (B == NULL)
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report_fatal_error("@test must have an instruction %B");
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}
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void ExpectPath(bool ExpectedResult) {
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static char ID;
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class IsPotentiallyReachableTestPass : public FunctionPass {
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public:
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IsPotentiallyReachableTestPass(bool ExpectedResult,
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Instruction *A, Instruction *B)
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: FunctionPass(ID), ExpectedResult(ExpectedResult), A(A), B(B) {}
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static int initialize() {
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PassInfo *PI = new PassInfo("isPotentiallyReachable testing pass",
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"", &ID, 0, true, true);
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PassRegistry::getPassRegistry()->registerPass(*PI, false);
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initializeLoopInfoPass(*PassRegistry::getPassRegistry());
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initializeDominatorTreePass(*PassRegistry::getPassRegistry());
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return 0;
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}
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void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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AU.addRequired<LoopInfo>();
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AU.addRequired<DominatorTree>();
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}
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bool runOnFunction(Function &F) {
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if (!F.hasName() || F.getName() != "test")
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return false;
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LoopInfo *LI = &getAnalysis<LoopInfo>();
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DominatorTree *DT = &getAnalysis<DominatorTree>();
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EXPECT_EQ(isPotentiallyReachable(A, B, 0, 0), ExpectedResult);
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EXPECT_EQ(isPotentiallyReachable(A, B, DT, 0), ExpectedResult);
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EXPECT_EQ(isPotentiallyReachable(A, B, 0, LI), ExpectedResult);
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EXPECT_EQ(isPotentiallyReachable(A, B, DT, LI), ExpectedResult);
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return false;
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}
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bool ExpectedResult;
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Instruction *A, *B;
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};
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static int initialize = IsPotentiallyReachableTestPass::initialize();
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(void)initialize;
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IsPotentiallyReachableTestPass *P =
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new IsPotentiallyReachableTestPass(ExpectedResult, A, B);
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PassManager PM;
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PM.add(P);
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PM.run(*M);
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}
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private:
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OwningPtr<Module> M;
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Instruction *A, *B;
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};
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}
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TEST_F(IsPotentiallyReachableTest, SameBlockNoPath) {
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ParseAssembly(
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"define void @test() {\n"
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"entry:\n"
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" bitcast i8 undef to i8\n"
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" %B = bitcast i8 undef to i8\n"
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" bitcast i8 undef to i8\n"
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" bitcast i8 undef to i8\n"
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" %A = bitcast i8 undef to i8\n"
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" ret void\n"
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"}\n");
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ExpectPath(false);
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}
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TEST_F(IsPotentiallyReachableTest, SameBlockPath) {
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ParseAssembly(
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"define void @test() {\n"
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"entry:\n"
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" %A = bitcast i8 undef to i8\n"
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" bitcast i8 undef to i8\n"
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" bitcast i8 undef to i8\n"
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" %B = bitcast i8 undef to i8\n"
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" ret void\n"
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"}\n");
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ExpectPath(true);
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}
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TEST_F(IsPotentiallyReachableTest, SameBlockNoLoop) {
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ParseAssembly(
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"define void @test() {\n"
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"entry:\n"
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" br label %middle\n"
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"middle:\n"
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" %B = bitcast i8 undef to i8\n"
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" bitcast i8 undef to i8\n"
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" bitcast i8 undef to i8\n"
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" %A = bitcast i8 undef to i8\n"
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" br label %nextblock\n"
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"nextblock:\n"
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" ret void\n"
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"}\n");
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ExpectPath(false);
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}
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TEST_F(IsPotentiallyReachableTest, StraightNoPath) {
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ParseAssembly(
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"define void @test() {\n"
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"entry:\n"
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" %B = bitcast i8 undef to i8\n"
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" br label %exit\n"
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"exit:\n"
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" %A = bitcast i8 undef to i8\n"
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" ret void\n"
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"}");
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ExpectPath(false);
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}
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TEST_F(IsPotentiallyReachableTest, StraightPath) {
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ParseAssembly(
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"define void @test() {\n"
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"entry:\n"
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" %A = bitcast i8 undef to i8\n"
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" br label %exit\n"
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"exit:\n"
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" %B = bitcast i8 undef to i8\n"
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" ret void\n"
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"}");
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ExpectPath(true);
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}
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TEST_F(IsPotentiallyReachableTest, DestUnreachable) {
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ParseAssembly(
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"define void @test() {\n"
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"entry:\n"
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" br label %midblock\n"
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"midblock:\n"
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" %A = bitcast i8 undef to i8\n"
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" ret void\n"
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"unreachable:\n"
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" %B = bitcast i8 undef to i8\n"
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" br label %midblock\n"
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"}");
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ExpectPath(false);
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}
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TEST_F(IsPotentiallyReachableTest, BranchToReturn) {
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ParseAssembly(
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"define void @test(i1 %x) {\n"
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"entry:\n"
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" %A = bitcast i8 undef to i8\n"
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" br i1 %x, label %block1, label %block2\n"
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"block1:\n"
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" ret void\n"
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"block2:\n"
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" %B = bitcast i8 undef to i8\n"
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" ret void\n"
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"}");
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ExpectPath(true);
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}
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TEST_F(IsPotentiallyReachableTest, SimpleLoop1) {
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ParseAssembly(
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"declare i1 @switch()\n"
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"\n"
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"define void @test() {\n"
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"entry:\n"
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" br label %loop\n"
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"loop:\n"
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" %B = bitcast i8 undef to i8\n"
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" %A = bitcast i8 undef to i8\n"
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" %x = call i1 @switch()\n"
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" br i1 %x, label %loop, label %exit\n"
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"exit:\n"
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" ret void\n"
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"}");
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ExpectPath(true);
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}
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TEST_F(IsPotentiallyReachableTest, SimpleLoop2) {
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ParseAssembly(
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"declare i1 @switch()\n"
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"\n"
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"define void @test() {\n"
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"entry:\n"
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" %B = bitcast i8 undef to i8\n"
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" br label %loop\n"
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"loop:\n"
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" %A = bitcast i8 undef to i8\n"
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" %x = call i1 @switch()\n"
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" br i1 %x, label %loop, label %exit\n"
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"exit:\n"
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" ret void\n"
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"}");
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ExpectPath(false);
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}
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TEST_F(IsPotentiallyReachableTest, SimpleLoop3) {
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ParseAssembly(
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"declare i1 @switch()\n"
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"\n"
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"define void @test() {\n"
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"entry:\n"
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" br label %loop\n"
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"loop:\n"
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" %B = bitcast i8 undef to i8\n"
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" %x = call i1 @switch()\n"
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" br i1 %x, label %loop, label %exit\n"
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"exit:\n"
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" %A = bitcast i8 undef to i8\n"
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" ret void\n"
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"}");
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ExpectPath(false);
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}
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TEST_F(IsPotentiallyReachableTest, OneLoopAfterTheOther1) {
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ParseAssembly(
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"declare i1 @switch()\n"
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"\n"
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"define void @test() {\n"
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"entry:\n"
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" br label %loop1\n"
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"loop1:\n"
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" %A = bitcast i8 undef to i8\n"
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" %x = call i1 @switch()\n"
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" br i1 %x, label %loop1, label %loop1exit\n"
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"loop1exit:\n"
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" br label %loop2\n"
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"loop2:\n"
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" %B = bitcast i8 undef to i8\n"
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" %y = call i1 @switch()\n"
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" br i1 %x, label %loop2, label %loop2exit\n"
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"loop2exit:"
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" ret void\n"
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"}");
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ExpectPath(true);
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}
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TEST_F(IsPotentiallyReachableTest, OneLoopAfterTheOther2) {
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ParseAssembly(
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"declare i1 @switch()\n"
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"\n"
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"define void @test() {\n"
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"entry:\n"
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" br label %loop1\n"
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"loop1:\n"
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" %B = bitcast i8 undef to i8\n"
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" %x = call i1 @switch()\n"
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" br i1 %x, label %loop1, label %loop1exit\n"
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"loop1exit:\n"
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" br label %loop2\n"
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"loop2:\n"
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" %A = bitcast i8 undef to i8\n"
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" %y = call i1 @switch()\n"
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" br i1 %x, label %loop2, label %loop2exit\n"
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"loop2exit:"
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" ret void\n"
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"}");
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ExpectPath(false);
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}
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TEST_F(IsPotentiallyReachableTest, OneLoopAfterTheOtherInsideAThirdLoop) {
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ParseAssembly(
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"declare i1 @switch()\n"
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"\n"
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"define void @test() {\n"
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"entry:\n"
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" br label %outerloop3\n"
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"outerloop3:\n"
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" br label %innerloop1\n"
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"innerloop1:\n"
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" %B = bitcast i8 undef to i8\n"
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" %x = call i1 @switch()\n"
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" br i1 %x, label %innerloop1, label %innerloop1exit\n"
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"innerloop1exit:\n"
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" br label %innerloop2\n"
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"innerloop2:\n"
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" %A = bitcast i8 undef to i8\n"
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" %y = call i1 @switch()\n"
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" br i1 %x, label %innerloop2, label %innerloop2exit\n"
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"innerloop2exit:"
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" ;; In outer loop3 now.\n"
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" %z = call i1 @switch()\n"
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" br i1 %z, label %outerloop3, label %exit\n"
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"exit:\n"
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" ret void\n"
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"}");
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ExpectPath(true);
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}
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TEST_F(IsPotentiallyReachableTest, BranchInsideLoop) {
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ParseAssembly(
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"declare i1 @switch()\n"
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"\n"
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"define void @test() {\n"
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"entry:\n"
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" br label %loop\n"
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"loop:\n"
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" %x = call i1 @switch()\n"
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" br i1 %x, label %nextloopblock, label %exit\n"
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"nextloopblock:\n"
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" %y = call i1 @switch()\n"
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" br i1 %y, label %left, label %right\n"
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"left:\n"
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" %A = bitcast i8 undef to i8\n"
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" br label %loop\n"
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"right:\n"
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" %B = bitcast i8 undef to i8\n"
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" br label %loop\n"
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"exit:\n"
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" ret void\n"
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"}");
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ExpectPath(true);
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}
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