70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
//===- CodeExtractor.cpp - Unit tests for CodeExtractor -------------------===//
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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/Transforms/Utils/CodeExtractor.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/Dominators.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/IRReader/IRReader.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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TEST(CodeExtractor, ExitStub) {
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LLVMContext Ctx;
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SMDiagnostic Err;
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std::unique_ptr<Module> M(parseAssemblyString(R"invalid(
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define i32 @foo(i32 %x, i32 %y, i32 %z) {
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header:
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%0 = icmp ugt i32 %x, %y
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br i1 %0, label %body1, label %body2
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body1:
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%1 = add i32 %z, 2
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br label %notExtracted
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body2:
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%2 = mul i32 %z, 7
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br label %notExtracted
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notExtracted:
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%3 = phi i32 [ %1, %body1 ], [ %2, %body2 ]
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%4 = add i32 %3, %x
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ret i32 %4
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}
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)invalid",
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Err, Ctx));
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Function *Func = M->getFunction("foo");
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SmallVector<BasicBlock *, 3> Candidates;
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for (auto &BB : *Func) {
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if (BB.getName() == "body1")
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Candidates.push_back(&BB);
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if (BB.getName() == "body2")
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Candidates.push_back(&BB);
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}
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// CodeExtractor requires the first basic block
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// to dominate all the other ones.
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Candidates.insert(Candidates.begin(), &Func->getEntryBlock());
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DominatorTree DT(*Func);
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CodeExtractor CE(Candidates, &DT);
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EXPECT_TRUE(CE.isEligible());
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Function *Outlined = CE.extractCodeRegion();
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EXPECT_TRUE(Outlined);
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EXPECT_FALSE(verifyFunction(*Outlined));
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}
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} // end anonymous namespace
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