259 lines
8.1 KiB
C++
259 lines
8.1 KiB
C++
//===- llvm/unittest/Bitcode/BitReaderTest.cpp - Tests for BitReader ------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/Bitcode/BitcodeReader.h"
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#include "llvm/Bitcode/BitcodeWriter.h"
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#include "llvm/IR/InstrTypes.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/IR/Verifier.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/MemoryBuffer.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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std::unique_ptr<Module> parseAssembly(LLVMContext &Context,
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const char *Assembly) {
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SMDiagnostic Error;
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std::unique_ptr<Module> M = parseAssemblyString(Assembly, Error, Context);
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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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// A failure here means that the test itself is buggy.
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if (!M)
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report_fatal_error(OS.str().c_str());
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return M;
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}
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static void writeModuleToBuffer(std::unique_ptr<Module> Mod,
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SmallVectorImpl<char> &Buffer) {
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raw_svector_ostream OS(Buffer);
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WriteBitcodeToFile(*Mod, OS);
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}
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static std::unique_ptr<Module> getLazyModuleFromAssembly(LLVMContext &Context,
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SmallString<1024> &Mem,
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const char *Assembly) {
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writeModuleToBuffer(parseAssembly(Context, Assembly), Mem);
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Expected<std::unique_ptr<Module>> ModuleOrErr =
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getLazyBitcodeModule(MemoryBufferRef(Mem.str(), "test"), Context);
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if (!ModuleOrErr)
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report_fatal_error("Could not parse bitcode module");
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return std::move(ModuleOrErr.get());
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}
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// Tests that lazy evaluation can parse functions out of order.
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TEST(BitReaderTest, MaterializeFunctionsOutOfOrder) {
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SmallString<1024> Mem;
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LLVMContext Context;
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std::unique_ptr<Module> M = getLazyModuleFromAssembly(
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Context, Mem, "define void @f() {\n"
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" unreachable\n"
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"}\n"
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"define void @g() {\n"
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" unreachable\n"
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"}\n"
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"define void @h() {\n"
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" unreachable\n"
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"}\n"
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"define void @j() {\n"
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" unreachable\n"
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"}\n");
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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Function *F = M->getFunction("f");
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Function *G = M->getFunction("g");
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Function *H = M->getFunction("h");
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Function *J = M->getFunction("j");
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// Initially all functions are not materialized (no basic blocks).
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EXPECT_TRUE(F->empty());
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EXPECT_TRUE(G->empty());
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EXPECT_TRUE(H->empty());
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EXPECT_TRUE(J->empty());
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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// Materialize h.
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ASSERT_FALSE(H->materialize());
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EXPECT_TRUE(F->empty());
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EXPECT_TRUE(G->empty());
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EXPECT_FALSE(H->empty());
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EXPECT_TRUE(J->empty());
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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// Materialize g.
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ASSERT_FALSE(G->materialize());
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EXPECT_TRUE(F->empty());
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EXPECT_FALSE(G->empty());
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EXPECT_FALSE(H->empty());
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EXPECT_TRUE(J->empty());
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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// Materialize j.
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ASSERT_FALSE(J->materialize());
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EXPECT_TRUE(F->empty());
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EXPECT_FALSE(G->empty());
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EXPECT_FALSE(H->empty());
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EXPECT_FALSE(J->empty());
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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// Materialize f.
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ASSERT_FALSE(F->materialize());
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EXPECT_FALSE(F->empty());
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EXPECT_FALSE(G->empty());
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EXPECT_FALSE(H->empty());
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EXPECT_FALSE(J->empty());
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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}
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TEST(BitReaderTest, MaterializeFunctionsStrictFP) {
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SmallString<1024> Mem;
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LLVMContext Context;
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std::unique_ptr<Module> M = getLazyModuleFromAssembly(
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Context, Mem, "define double @foo(double %a) {\n"
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" %result = call double @bar(double %a) strictfp\n"
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" ret double %result\n"
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"}\n"
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"declare double @bar(double)\n");
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Function *Foo = M->getFunction("foo");
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ASSERT_FALSE(Foo->materialize());
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EXPECT_FALSE(Foo->empty());
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for (auto &BB : *Foo) {
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auto It = BB.begin();
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while (It != BB.end()) {
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Instruction &I = *It;
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++It;
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if (auto *Call = dyn_cast<CallBase>(&I)) {
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EXPECT_FALSE(Call->isStrictFP());
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EXPECT_TRUE(Call->isNoBuiltin());
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}
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}
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}
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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}
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TEST(BitReaderTest, MaterializeConstrainedFPStrictFP) {
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SmallString<1024> Mem;
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LLVMContext Context;
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std::unique_ptr<Module> M = getLazyModuleFromAssembly(
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Context, Mem,
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"define double @foo(double %a) {\n"
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" %result = call double @llvm.experimental.constrained.sqrt.f64(double "
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"%a, metadata !\"round.tonearest\", metadata !\"fpexcept.strict\") "
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"strictfp\n"
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" ret double %result\n"
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"}\n"
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"declare double @llvm.experimental.constrained.sqrt.f64(double, "
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"metadata, metadata)\n");
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Function *Foo = M->getFunction("foo");
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ASSERT_FALSE(Foo->materialize());
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EXPECT_FALSE(Foo->empty());
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for (auto &BB : *Foo) {
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auto It = BB.begin();
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while (It != BB.end()) {
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Instruction &I = *It;
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++It;
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if (auto *Call = dyn_cast<CallBase>(&I)) {
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EXPECT_TRUE(Call->isStrictFP());
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EXPECT_FALSE(Call->isNoBuiltin());
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}
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}
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}
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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}
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TEST(BitReaderTest, MaterializeFunctionsForBlockAddr) { // PR11677
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SmallString<1024> Mem;
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LLVMContext Context;
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std::unique_ptr<Module> M = getLazyModuleFromAssembly(
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Context, Mem, "@table = constant i8* blockaddress(@func, %bb)\n"
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"define void @func() {\n"
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" unreachable\n"
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"bb:\n"
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" unreachable\n"
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"}\n");
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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EXPECT_FALSE(M->getFunction("func")->empty());
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}
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TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionBefore) {
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SmallString<1024> Mem;
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LLVMContext Context;
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std::unique_ptr<Module> M = getLazyModuleFromAssembly(
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Context, Mem, "define i8* @before() {\n"
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" ret i8* blockaddress(@func, %bb)\n"
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"}\n"
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"define void @other() {\n"
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" unreachable\n"
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"}\n"
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"define void @func() {\n"
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" unreachable\n"
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"bb:\n"
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" unreachable\n"
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"}\n");
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EXPECT_TRUE(M->getFunction("before")->empty());
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EXPECT_TRUE(M->getFunction("func")->empty());
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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// Materialize @before, pulling in @func.
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EXPECT_FALSE(M->getFunction("before")->materialize());
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EXPECT_FALSE(M->getFunction("func")->empty());
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EXPECT_TRUE(M->getFunction("other")->empty());
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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}
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TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionAfter) {
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SmallString<1024> Mem;
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LLVMContext Context;
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std::unique_ptr<Module> M = getLazyModuleFromAssembly(
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Context, Mem, "define void @func() {\n"
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" unreachable\n"
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"bb:\n"
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" unreachable\n"
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"}\n"
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"define void @other() {\n"
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" unreachable\n"
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"}\n"
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"define i8* @after() {\n"
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" ret i8* blockaddress(@func, %bb)\n"
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"}\n");
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EXPECT_TRUE(M->getFunction("after")->empty());
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EXPECT_TRUE(M->getFunction("func")->empty());
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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// Materialize @after, pulling in @func.
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EXPECT_FALSE(M->getFunction("after")->materialize());
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EXPECT_FALSE(M->getFunction("func")->empty());
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EXPECT_TRUE(M->getFunction("other")->empty());
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EXPECT_FALSE(verifyModule(*M, &dbgs()));
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}
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} // end namespace
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