//===----------------------------------------------------------------------===//
#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/ADT/SetVector.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/BasicAliasAnalysis.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
+#include "llvm/IR/InstIterator.h"
#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
+using namespace llvm;
+
+// Set up some test passes.
namespace llvm {
+void initializeAATestPassPass(PassRegistry&);
+void initializeTestCustomAAWrapperPassPass(PassRegistry&);
+}
+
+namespace {
+struct AATestPass : FunctionPass {
+ static char ID;
+ AATestPass() : FunctionPass(ID) {
+ initializeAATestPassPass(*PassRegistry::getPassRegistry());
+ }
+
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
+ AU.addRequired<AAResultsWrapperPass>();
+ AU.setPreservesAll();
+ }
+
+ bool runOnFunction(Function &F) override {
+ AliasAnalysis &AA = getAnalysis<AAResultsWrapperPass>().getAAResults();
+
+ SetVector<Value *> Pointers;
+ for (Argument &A : F.args())
+ if (A.getType()->isPointerTy())
+ Pointers.insert(&A);
+ for (Instruction &I : instructions(F))
+ if (I.getType()->isPointerTy())
+ Pointers.insert(&I);
+
+ for (Value *P1 : Pointers)
+ for (Value *P2 : Pointers)
+ (void)AA.alias(P1, MemoryLocation::UnknownSize, P2,
+ MemoryLocation::UnknownSize);
+
+ return false;
+ }
+};
+}
+
+char AATestPass::ID = 0;
+INITIALIZE_PASS_BEGIN(AATestPass, "aa-test-pas", "Alias Analysis Test Pass",
+ false, true)
+INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)
+INITIALIZE_PASS_END(AATestPass, "aa-test-pass", "Alias Analysis Test Pass",
+ false, true)
+
+namespace {
+/// A test customizable AA result. It merely accepts a callback to run whenever
+/// it receives an alias query. Useful for testing that a particular AA result
+/// is reached.
+struct TestCustomAAResult : AAResultBase<TestCustomAAResult> {
+ friend AAResultBase<TestCustomAAResult>;
+
+ std::function<void()> CB;
+
+ explicit TestCustomAAResult(const TargetLibraryInfo &TLI,
+ std::function<void()> CB)
+ : AAResultBase(TLI), CB(std::move(CB)) {}
+ TestCustomAAResult(TestCustomAAResult &&Arg)
+ : AAResultBase(std::move(Arg)), CB(std::move(Arg.CB)) {}
+
+ bool invalidate(Function &, const PreservedAnalyses &) { return false; }
+
+ AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB) {
+ CB();
+ return MayAlias;
+ }
+};
+}
+
+namespace {
+/// A wrapper pass for the legacy pass manager to use with the above custom AA
+/// result.
+class TestCustomAAWrapperPass : public ImmutablePass {
+ std::function<void()> CB;
+ std::unique_ptr<TestCustomAAResult> Result;
+
+public:
+ static char ID;
+
+ explicit TestCustomAAWrapperPass(
+ std::function<void()> CB = std::function<void()>())
+ : ImmutablePass(ID), CB(std::move(CB)) {
+ initializeTestCustomAAWrapperPassPass(*PassRegistry::getPassRegistry());
+ }
+
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
+ AU.setPreservesAll();
+ AU.addRequired<TargetLibraryInfoWrapperPass>();
+ }
+
+ bool doInitialization(Module &M) override {
+ Result.reset(new TestCustomAAResult(
+ getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(), std::move(CB)));
+ return true;
+ }
+
+ bool doFinalization(Module &M) override {
+ Result.reset();
+ return true;
+ }
+
+ TestCustomAAResult &getResult() { return *Result; }
+ const TestCustomAAResult &getResult() const { return *Result; }
+};
+}
+
+char TestCustomAAWrapperPass::ID = 0;
+INITIALIZE_PASS_BEGIN(TestCustomAAWrapperPass, "test-custom-aa",
+ "Test Custom AA Wrapper Pass", false, true)
+INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
+INITIALIZE_PASS_END(TestCustomAAWrapperPass, "test-custom-aa",
+ "Test Custom AA Wrapper Pass", false, true)
+
namespace {
class AliasAnalysisTest : public testing::Test {
EXPECT_EQ(AA.getModRefInfo(AtomicRMW), MRI_ModRef);
}
+class AAPassInfraTest : public testing::Test {
+protected:
+ LLVMContext &C;
+ SMDiagnostic Err;
+ std::unique_ptr<Module> M;
+
+public:
+ AAPassInfraTest()
+ : C(getGlobalContext()),
+ M(parseAssemblyString("define i32 @f(i32* %x, i32* %y) {\n"
+ "entry:\n"
+ " %lx = load i32, i32* %x\n"
+ " %ly = load i32, i32* %y\n"
+ " %sum = add i32 %lx, %ly\n"
+ " ret i32 %sum\n"
+ "}\n",
+ Err, C)) {
+ assert(M && "Failed to build the module!");
+ }
+};
+
+TEST_F(AAPassInfraTest, injectExternalAA) {
+ legacy::PassManager PM;
+
+ // Register our custom AA's wrapper pass manually.
+ bool IsCustomAAQueried = false;
+ PM.add(new TestCustomAAWrapperPass([&] { IsCustomAAQueried = true; }));
+
+ // Now add the external AA wrapper with a lambda which queries for the
+ // wrapper around our custom AA and adds it to the results.
+ PM.add(createExternalAAWrapperPass([](Pass &P, Function &, AAResults &AAR) {
+ if (auto *WrapperPass = P.getAnalysisIfAvailable<TestCustomAAWrapperPass>())
+ AAR.addAAResult(WrapperPass->getResult());
+ }));
+
+ // And run a pass that will make some alias queries. This will automatically
+ // trigger the rest of the alias analysis stack to be run. It is analagous to
+ // building a full pass pipeline with any of the existing pass manager
+ // builders.
+ PM.add(new AATestPass());
+ PM.run(*M);
+
+ // Finally, ensure that our custom AA was indeed queried.
+ EXPECT_TRUE(IsCustomAAQueried);
+}
+
} // end anonymous namspace
-} // end llvm namespace
projects / oota-llvm.git / blobdiff