blob: db30837507aab7d40c9ab1aded959369fecb2b98 [file] [log] [blame]
//===- BasicBlockUtils.cpp - Unit tests for BasicBlockUtils ---------------===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/LLVMContext.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("BasicBlockUtilsTests", errs());
return Mod;
TEST(BasicBlockUtils, SplitBlockPredecessors) {
LLVMContext C;
std::unique_ptr<Module> M = parseIR(
"define i32 @basic_func(i1 %cond) {\n"
" br i1 %cond, label %bb0, label %bb1\n"
" br label %bb1\n"
" %phi = phi i32 [ 0, %entry ], [ 1, %bb0 ]"
" ret i32 %phi\n"
auto *F = M->getFunction("basic_func");
DominatorTree DT(*F);
// Make sure the dominator tree is properly updated if calling this on the
// entry block.
SplitBlockPredecessors(&F->getEntryBlock(), {}, "split.entry", &DT);