+++ /dev/null
-//===- LoopUtilsTest.cpp - Unit tests for LoopUtils -----------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Transforms/Utils/LoopUtils.h"
-#include "llvm/AsmParser/Parser.h"
-#include "llvm/Support/SourceMgr.h"
-#include "gtest/gtest.h"
-
-using namespace llvm;
-
-static std::unique_ptr<Module> parseIR(LLVMContext &C, const char *IR) {
- SMDiagnostic Err;
- std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
- if (!Mod)
- Err.print("LoopUtilsTests", errs());
- return Mod;
-}
-
-static void run(Module &M, StringRef FuncName,
- function_ref<void(Function &F, DominatorTree &DT,
- ScalarEvolution &SE, LoopInfo &LI)>
- Test) {
- Function *F = M.getFunction(FuncName);
- DominatorTree DT(*F);
- TargetLibraryInfoImpl TLII;
- TargetLibraryInfo TLI(TLII);
- AssumptionCache AC(*F);
- LoopInfo LI(DT);
- ScalarEvolution SE(*F, TLI, AC, DT, LI);
- Test(*F, DT, SE, LI);
-}
-
-TEST(LoopUtils, DeleteDeadLoopNest) {
- LLVMContext C;
- std::unique_ptr<Module> M =
- parseIR(C, "define void @foo() {\n"
- "entry:\n"
- " br label %for.i\n"
- "for.i:\n"
- " %i = phi i64 [ 0, %entry ], [ %inc.i, %for.i.latch ]\n"
- " br label %for.j\n"
- "for.j:\n"
- " %j = phi i64 [ 0, %for.i ], [ %inc.j, %for.j ]\n"
- " %inc.j = add nsw i64 %j, 1\n"
- " %cmp.j = icmp slt i64 %inc.j, 100\n"
- " br i1 %cmp.j, label %for.j, label %for.k.preheader\n"
- "for.k.preheader:\n"
- " br label %for.k\n"
- "for.k:\n"
- " %k = phi i64 [ %inc.k, %for.k ], [ 0, %for.k.preheader ]\n"
- " %inc.k = add nsw i64 %k, 1\n"
- " %cmp.k = icmp slt i64 %inc.k, 100\n"
- " br i1 %cmp.k, label %for.k, label %for.i.latch\n"
- "for.i.latch:\n"
- " %inc.i = add nsw i64 %i, 1\n"
- " %cmp.i = icmp slt i64 %inc.i, 100\n"
- " br i1 %cmp.i, label %for.i, label %for.end\n"
- "for.end:\n"
- " ret void\n"
- "}\n");
-
- run(*M, "foo",
- [&](Function &F, DominatorTree &DT, ScalarEvolution &SE, LoopInfo &LI) {
- assert(LI.begin() != LI.end() && "Expecting loops in function F");
- Loop *L = *LI.begin();
- assert(L && L->getName() == "for.i" && "Expecting loop for.i");
-
- deleteDeadLoop(L, &DT, &SE, &LI);
-
- assert(DT.verify(DominatorTree::VerificationLevel::Fast) &&
- "Expecting valid dominator tree");
- LI.verify(DT);
- assert(LI.begin() == LI.end() &&
- "Expecting no loops left in function F");
- SE.verify();
-
- Function::iterator FI = F.begin();
- BasicBlock *Entry = &*(FI++);
- assert(Entry->getName() == "entry" && "Expecting BasicBlock entry");
- const BranchInst *BI = dyn_cast<BranchInst>(Entry->getTerminator());
- assert(BI && "Expecting valid branch instruction");
- EXPECT_EQ(BI->getNumSuccessors(), (unsigned)1);
- EXPECT_EQ(BI->getSuccessor(0)->getName(), "for.end");
- });
-}