//===----------------------------------------------------------------------===//
#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/AsmParser/Parser.h"
#include "llvm/Bitcode/BitstreamWriter.h"
#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Verifier.h"
+#include "llvm/Support/DataStream.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
namespace {
std::unique_ptr<Module> parseAssembly(const char *Assembly) {
- auto M = make_unique<Module>("Module", getGlobalContext());
-
SMDiagnostic Error;
- bool Parsed =
- ParseAssemblyString(Assembly, M.get(), Error, M->getContext()) == M.get();
+ std::unique_ptr<Module> M =
+ parseAssemblyString(Assembly, Error, getGlobalContext());
std::string ErrMsg;
raw_string_ostream OS(ErrMsg);
Error.print("", OS);
// A failure here means that the test itself is buggy.
- if (!Parsed)
+ if (!M)
report_fatal_error(OS.str().c_str());
return M;
SmallString<1024> &Mem,
const char *Assembly) {
writeModuleToBuffer(parseAssembly(Assembly), Mem);
- MemoryBuffer *Buffer = MemoryBuffer::getMemBuffer(Mem.str(), "test", false);
- ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer, Context);
- return std::unique_ptr<Module>(ModuleOrErr.get());
+ std::unique_ptr<MemoryBuffer> Buffer =
+ MemoryBuffer::getMemBuffer(Mem.str(), "test", false);
+ ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
+ getLazyBitcodeModule(std::move(Buffer), Context);
+ return std::move(ModuleOrErr.get());
+}
+
+class BufferDataStreamer : public DataStreamer {
+ std::unique_ptr<MemoryBuffer> Buffer;
+ unsigned Pos = 0;
+ size_t GetBytes(unsigned char *Out, size_t Len) override {
+ StringRef Buf = Buffer->getBuffer();
+ size_t Left = Buf.size() - Pos;
+ Len = std::min(Left, Len);
+ memcpy(Out, Buffer->getBuffer().substr(Pos).data(), Len);
+ Pos += Len;
+ return Len;
+ }
+
+public:
+ BufferDataStreamer(std::unique_ptr<MemoryBuffer> Buffer)
+ : Buffer(std::move(Buffer)) {}
+};
+
+static std::unique_ptr<Module>
+getStreamedModuleFromAssembly(LLVMContext &Context, SmallString<1024> &Mem,
+ const char *Assembly) {
+ writeModuleToBuffer(parseAssembly(Assembly), Mem);
+ std::unique_ptr<MemoryBuffer> Buffer =
+ MemoryBuffer::getMemBuffer(Mem.str(), "test", false);
+ auto Streamer = llvm::make_unique<BufferDataStreamer>(std::move(Buffer));
+ ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
+ getStreamedBitcodeModule("test", std::move(Streamer), Context);
+ return std::move(ModuleOrErr.get());
+}
+
+TEST(BitReaderTest, MateralizeForwardRefWithStream) {
+ SmallString<1024> Mem;
+
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getStreamedModuleFromAssembly(
+ Context, Mem, "@table = constant i8* blockaddress(@func, %bb)\n"
+ "define void @func() {\n"
+ " unreachable\n"
+ "bb:\n"
+ " unreachable\n"
+ "}\n");
+ EXPECT_FALSE(M->getFunction("func")->empty());
+}
+
+TEST(BitReaderTest, DematerializeFunctionPreservesLinkageType) {
+ SmallString<1024> Mem;
+
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+ Context, Mem, "define internal i32 @func() {\n"
+ "ret i32 0\n"
+ "}\n");
+
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ M->getFunction("func")->materialize();
+ EXPECT_FALSE(M->getFunction("func")->empty());
+ EXPECT_TRUE(M->getFunction("func")->getLinkage() ==
+ GlobalValue::InternalLinkage);
+
+ // Check that the linkage type is preserved after dematerialization.
+ M->getFunction("func")->dematerialize();
+ EXPECT_TRUE(M->getFunction("func")->empty());
+ EXPECT_TRUE(M->getFunction("func")->getLinkage() ==
+ GlobalValue::InternalLinkage);
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+}
+
+// Tests that lazy evaluation can parse functions out of order.
+TEST(BitReaderTest, MaterializeFunctionsOutOfOrder) {
+ SmallString<1024> Mem;
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+ Context, Mem, "define void @f() {\n"
+ " unreachable\n"
+ "}\n"
+ "define void @g() {\n"
+ " unreachable\n"
+ "}\n"
+ "define void @h() {\n"
+ " unreachable\n"
+ "}\n"
+ "define void @j() {\n"
+ " unreachable\n"
+ "}\n");
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ Function *F = M->getFunction("f");
+ Function *G = M->getFunction("g");
+ Function *H = M->getFunction("h");
+ Function *J = M->getFunction("j");
+
+ // Initially all functions are not materialized (no basic blocks).
+ EXPECT_TRUE(F->empty());
+ EXPECT_TRUE(G->empty());
+ EXPECT_TRUE(H->empty());
+ EXPECT_TRUE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize h.
+ H->materialize();
+ EXPECT_TRUE(F->empty());
+ EXPECT_TRUE(G->empty());
+ EXPECT_FALSE(H->empty());
+ EXPECT_TRUE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize g.
+ G->materialize();
+ EXPECT_TRUE(F->empty());
+ EXPECT_FALSE(G->empty());
+ EXPECT_FALSE(H->empty());
+ EXPECT_TRUE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize j.
+ J->materialize();
+ EXPECT_TRUE(F->empty());
+ EXPECT_FALSE(G->empty());
+ EXPECT_FALSE(H->empty());
+ EXPECT_FALSE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize f.
+ F->materialize();
+ EXPECT_FALSE(F->empty());
+ EXPECT_FALSE(G->empty());
+ EXPECT_FALSE(H->empty());
+ EXPECT_FALSE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
TEST(BitReaderTest, MaterializeFunctionsForBlockAddr) { // PR11677
" unreachable\n"
"}\n");
EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Try (and fail) to dematerialize @func.
+ M->getFunction("func")->dematerialize();
+ EXPECT_FALSE(M->getFunction("func")->empty());
+}
+
+TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionBefore) {
+ SmallString<1024> Mem;
+
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+ Context, Mem, "define i8* @before() {\n"
+ " ret i8* blockaddress(@func, %bb)\n"
+ "}\n"
+ "define void @other() {\n"
+ " unreachable\n"
+ "}\n"
+ "define void @func() {\n"
+ " unreachable\n"
+ "bb:\n"
+ " unreachable\n"
+ "}\n");
+ EXPECT_TRUE(M->getFunction("before")->empty());
+ EXPECT_TRUE(M->getFunction("func")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize @before, pulling in @func.
+ EXPECT_FALSE(M->getFunction("before")->materialize());
+ EXPECT_FALSE(M->getFunction("func")->empty());
+ EXPECT_TRUE(M->getFunction("other")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Try (and fail) to dematerialize @func.
+ M->getFunction("func")->dematerialize();
+ EXPECT_FALSE(M->getFunction("func")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+}
+
+TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionAfter) {
+ SmallString<1024> Mem;
+
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+ Context, Mem, "define void @func() {\n"
+ " unreachable\n"
+ "bb:\n"
+ " unreachable\n"
+ "}\n"
+ "define void @other() {\n"
+ " unreachable\n"
+ "}\n"
+ "define i8* @after() {\n"
+ " ret i8* blockaddress(@func, %bb)\n"
+ "}\n");
+ EXPECT_TRUE(M->getFunction("after")->empty());
+ EXPECT_TRUE(M->getFunction("func")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize @after, pulling in @func.
+ EXPECT_FALSE(M->getFunction("after")->materialize());
+ EXPECT_FALSE(M->getFunction("func")->empty());
+ EXPECT_TRUE(M->getFunction("other")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Try (and fail) to dematerialize @func.
+ M->getFunction("func")->dematerialize();
+ EXPECT_FALSE(M->getFunction("func")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
} // end namespace
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