mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-12-06 02:47:20 +00:00
87b8e94f84
clang-format (https://reviews.llvm.org/D33932) to keep primary headers at the top and handle new utility headers like 'gmock' consistently with other utility headers. No other change was made. I did no manual edits, all of this is clang-format. This should allow other changes to have more clear and focused diffs, and is especially motivated by moving some headers into more focused libraries. llvm-svn: 304786
389 lines
10 KiB
C++
389 lines
10 KiB
C++
//===- CFGTest.cpp - CFG tests --------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/CFG.h"
|
|
#include "llvm/Analysis/LoopInfo.h"
|
|
#include "llvm/AsmParser/Parser.h"
|
|
#include "llvm/IR/Dominators.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/InstIterator.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/LegacyPassManager.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
// This fixture assists in running the isPotentiallyReachable utility four ways
|
|
// and ensuring it produces the correct answer each time.
|
|
class IsPotentiallyReachableTest : public testing::Test {
|
|
protected:
|
|
void ParseAssembly(const char *Assembly) {
|
|
SMDiagnostic Error;
|
|
M = parseAssemblyString(Assembly, Error, Context);
|
|
|
|
std::string errMsg;
|
|
raw_string_ostream os(errMsg);
|
|
Error.print("", os);
|
|
|
|
// A failure here means that the test itself is buggy.
|
|
if (!M)
|
|
report_fatal_error(os.str().c_str());
|
|
|
|
Function *F = M->getFunction("test");
|
|
if (F == nullptr)
|
|
report_fatal_error("Test must have a function named @test");
|
|
|
|
A = B = nullptr;
|
|
for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
|
|
if (I->hasName()) {
|
|
if (I->getName() == "A")
|
|
A = &*I;
|
|
else if (I->getName() == "B")
|
|
B = &*I;
|
|
}
|
|
}
|
|
if (A == nullptr)
|
|
report_fatal_error("@test must have an instruction %A");
|
|
if (B == nullptr)
|
|
report_fatal_error("@test must have an instruction %B");
|
|
}
|
|
|
|
void ExpectPath(bool ExpectedResult) {
|
|
static char ID;
|
|
class IsPotentiallyReachableTestPass : public FunctionPass {
|
|
public:
|
|
IsPotentiallyReachableTestPass(bool ExpectedResult,
|
|
Instruction *A, Instruction *B)
|
|
: FunctionPass(ID), ExpectedResult(ExpectedResult), A(A), B(B) {}
|
|
|
|
static int initialize() {
|
|
PassInfo *PI = new PassInfo("isPotentiallyReachable testing pass",
|
|
"", &ID, nullptr, true, true);
|
|
PassRegistry::getPassRegistry()->registerPass(*PI, false);
|
|
initializeLoopInfoWrapperPassPass(*PassRegistry::getPassRegistry());
|
|
initializeDominatorTreeWrapperPassPass(
|
|
*PassRegistry::getPassRegistry());
|
|
return 0;
|
|
}
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const override {
|
|
AU.setPreservesAll();
|
|
AU.addRequired<LoopInfoWrapperPass>();
|
|
AU.addRequired<DominatorTreeWrapperPass>();
|
|
}
|
|
|
|
bool runOnFunction(Function &F) override {
|
|
if (!F.hasName() || F.getName() != "test")
|
|
return false;
|
|
|
|
LoopInfo *LI = &getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
|
|
DominatorTree *DT =
|
|
&getAnalysis<DominatorTreeWrapperPass>().getDomTree();
|
|
EXPECT_EQ(isPotentiallyReachable(A, B, nullptr, nullptr),
|
|
ExpectedResult);
|
|
EXPECT_EQ(isPotentiallyReachable(A, B, DT, nullptr), ExpectedResult);
|
|
EXPECT_EQ(isPotentiallyReachable(A, B, nullptr, LI), ExpectedResult);
|
|
EXPECT_EQ(isPotentiallyReachable(A, B, DT, LI), ExpectedResult);
|
|
return false;
|
|
}
|
|
bool ExpectedResult;
|
|
Instruction *A, *B;
|
|
};
|
|
|
|
static int initialize = IsPotentiallyReachableTestPass::initialize();
|
|
(void)initialize;
|
|
|
|
IsPotentiallyReachableTestPass *P =
|
|
new IsPotentiallyReachableTestPass(ExpectedResult, A, B);
|
|
legacy::PassManager PM;
|
|
PM.add(P);
|
|
PM.run(*M);
|
|
}
|
|
|
|
LLVMContext Context;
|
|
std::unique_ptr<Module> M;
|
|
Instruction *A, *B;
|
|
};
|
|
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, SameBlockNoPath) {
|
|
ParseAssembly(
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" bitcast i8 undef to i8\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" bitcast i8 undef to i8\n"
|
|
" bitcast i8 undef to i8\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" ret void\n"
|
|
"}\n");
|
|
ExpectPath(false);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, SameBlockPath) {
|
|
ParseAssembly(
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" bitcast i8 undef to i8\n"
|
|
" bitcast i8 undef to i8\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" ret void\n"
|
|
"}\n");
|
|
ExpectPath(true);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, SameBlockNoLoop) {
|
|
ParseAssembly(
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" br label %middle\n"
|
|
"middle:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" bitcast i8 undef to i8\n"
|
|
" bitcast i8 undef to i8\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" br label %nextblock\n"
|
|
"nextblock:\n"
|
|
" ret void\n"
|
|
"}\n");
|
|
ExpectPath(false);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, StraightNoPath) {
|
|
ParseAssembly(
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" br label %exit\n"
|
|
"exit:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" ret void\n"
|
|
"}");
|
|
ExpectPath(false);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, StraightPath) {
|
|
ParseAssembly(
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" br label %exit\n"
|
|
"exit:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" ret void\n"
|
|
"}");
|
|
ExpectPath(true);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, DestUnreachable) {
|
|
ParseAssembly(
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" br label %midblock\n"
|
|
"midblock:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" ret void\n"
|
|
"unreachable:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" br label %midblock\n"
|
|
"}");
|
|
ExpectPath(false);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, BranchToReturn) {
|
|
ParseAssembly(
|
|
"define void @test(i1 %x) {\n"
|
|
"entry:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" br i1 %x, label %block1, label %block2\n"
|
|
"block1:\n"
|
|
" ret void\n"
|
|
"block2:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" ret void\n"
|
|
"}");
|
|
ExpectPath(true);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, SimpleLoop1) {
|
|
ParseAssembly(
|
|
"declare i1 @switch()\n"
|
|
"\n"
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" br label %loop\n"
|
|
"loop:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" %x = call i1 @switch()\n"
|
|
" br i1 %x, label %loop, label %exit\n"
|
|
"exit:\n"
|
|
" ret void\n"
|
|
"}");
|
|
ExpectPath(true);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, SimpleLoop2) {
|
|
ParseAssembly(
|
|
"declare i1 @switch()\n"
|
|
"\n"
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" br label %loop\n"
|
|
"loop:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" %x = call i1 @switch()\n"
|
|
" br i1 %x, label %loop, label %exit\n"
|
|
"exit:\n"
|
|
" ret void\n"
|
|
"}");
|
|
ExpectPath(false);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, SimpleLoop3) {
|
|
ParseAssembly(
|
|
"declare i1 @switch()\n"
|
|
"\n"
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" br label %loop\n"
|
|
"loop:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" %x = call i1 @switch()\n"
|
|
" br i1 %x, label %loop, label %exit\n"
|
|
"exit:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" ret void\n"
|
|
"}");
|
|
ExpectPath(false);
|
|
}
|
|
|
|
|
|
TEST_F(IsPotentiallyReachableTest, OneLoopAfterTheOther1) {
|
|
ParseAssembly(
|
|
"declare i1 @switch()\n"
|
|
"\n"
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" br label %loop1\n"
|
|
"loop1:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" %x = call i1 @switch()\n"
|
|
" br i1 %x, label %loop1, label %loop1exit\n"
|
|
"loop1exit:\n"
|
|
" br label %loop2\n"
|
|
"loop2:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" %y = call i1 @switch()\n"
|
|
" br i1 %x, label %loop2, label %loop2exit\n"
|
|
"loop2exit:"
|
|
" ret void\n"
|
|
"}");
|
|
ExpectPath(true);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, OneLoopAfterTheOther2) {
|
|
ParseAssembly(
|
|
"declare i1 @switch()\n"
|
|
"\n"
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" br label %loop1\n"
|
|
"loop1:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" %x = call i1 @switch()\n"
|
|
" br i1 %x, label %loop1, label %loop1exit\n"
|
|
"loop1exit:\n"
|
|
" br label %loop2\n"
|
|
"loop2:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" %y = call i1 @switch()\n"
|
|
" br i1 %x, label %loop2, label %loop2exit\n"
|
|
"loop2exit:"
|
|
" ret void\n"
|
|
"}");
|
|
ExpectPath(false);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, OneLoopAfterTheOtherInsideAThirdLoop) {
|
|
ParseAssembly(
|
|
"declare i1 @switch()\n"
|
|
"\n"
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" br label %outerloop3\n"
|
|
"outerloop3:\n"
|
|
" br label %innerloop1\n"
|
|
"innerloop1:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" %x = call i1 @switch()\n"
|
|
" br i1 %x, label %innerloop1, label %innerloop1exit\n"
|
|
"innerloop1exit:\n"
|
|
" br label %innerloop2\n"
|
|
"innerloop2:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" %y = call i1 @switch()\n"
|
|
" br i1 %x, label %innerloop2, label %innerloop2exit\n"
|
|
"innerloop2exit:"
|
|
" ;; In outer loop3 now.\n"
|
|
" %z = call i1 @switch()\n"
|
|
" br i1 %z, label %outerloop3, label %exit\n"
|
|
"exit:\n"
|
|
" ret void\n"
|
|
"}");
|
|
ExpectPath(true);
|
|
}
|
|
|
|
static const char *BranchInsideLoopIR =
|
|
"declare i1 @switch()\n"
|
|
"\n"
|
|
"define void @test() {\n"
|
|
"entry:\n"
|
|
" br label %loop\n"
|
|
"loop:\n"
|
|
" %x = call i1 @switch()\n"
|
|
" br i1 %x, label %nextloopblock, label %exit\n"
|
|
"nextloopblock:\n"
|
|
" %y = call i1 @switch()\n"
|
|
" br i1 %y, label %left, label %right\n"
|
|
"left:\n"
|
|
" %A = bitcast i8 undef to i8\n"
|
|
" br label %loop\n"
|
|
"right:\n"
|
|
" %B = bitcast i8 undef to i8\n"
|
|
" br label %loop\n"
|
|
"exit:\n"
|
|
" ret void\n"
|
|
"}";
|
|
|
|
TEST_F(IsPotentiallyReachableTest, BranchInsideLoop) {
|
|
ParseAssembly(BranchInsideLoopIR);
|
|
ExpectPath(true);
|
|
}
|
|
|
|
TEST_F(IsPotentiallyReachableTest, ModifyTest) {
|
|
ParseAssembly(BranchInsideLoopIR);
|
|
|
|
succ_iterator S = succ_begin(&*++M->getFunction("test")->begin());
|
|
BasicBlock *OldBB = S[0];
|
|
S[0] = S[1];
|
|
ExpectPath(false);
|
|
S[0] = OldBB;
|
|
ExpectPath(true);
|
|
}
|