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https://github.com/RPCS3/llvm.git
synced 2026-07-21 11:15:29 -04:00
Jakub Kuderski
bcebc16153
Summary: If the extracted region has multiple exported data flows toward the same BB which is not included in the region, correct resotre instructions and PHI nodes won't be generated inside the exitStub. The solution is simply put the restore instructions right after the definition of output values instead of putting in exitStub. Unittest for this bug is included. Author: myhsu Reviewers: chandlerc, davide, lattner, silvas, davidxl, wmi, kuhar Subscribers: dberlin, kuhar, mgorny, llvm-commits Differential Revision: https://reviews.llvm.org/D37902 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315041 91177308-0d34-0410-b5e6-96231b3b80d8
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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