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//===- CodeExtractor.cpp - Unit tests for CodeExtractor -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/CodeExtractor.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Verifier.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
TEST(CodeExtractor, ExitStub) {
LLVMContext Ctx;
SMDiagnostic Err;
std::unique_ptr<Module> M(parseAssemblyString(R"invalid(
define i32 @foo(i32 %x, i32 %y, i32 %z) {
header:
%0 = icmp ugt i32 %x, %y
br i1 %0, label %body1, label %body2
body1:
%1 = add i32 %z, 2
br label %notExtracted
body2:
%2 = mul i32 %z, 7
br label %notExtracted
notExtracted:
%3 = phi i32 [ %1, %body1 ], [ %2, %body2 ]
%4 = add i32 %3, %x
ret i32 %4
}
)invalid",
Err, Ctx));
Function *Func = M->getFunction("foo");
SmallVector<BasicBlock *, 3> Candidates;
for (auto &BB : *Func) {
if (BB.getName() == "body1")
Candidates.push_back(&BB);
if (BB.getName() == "body2")
Candidates.push_back(&BB);
}
// CodeExtractor requires the first basic block
// to dominate all the other ones.
Candidates.insert(Candidates.begin(), &Func->getEntryBlock());
DominatorTree DT(*Func);
CodeExtractor CE(Candidates, &DT);
EXPECT_TRUE(CE.isEligible());
Function *Outlined = CE.extractCodeRegion();
EXPECT_TRUE(Outlined);
EXPECT_FALSE(verifyFunction(*Outlined));
}
} // end anonymous namespace
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