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849db7fa02
This reverts commit f976cf4cca0794267f28b54e468007fd476d37d9. I am reverting this because it causes break in a few bots and its going to take me sometime to look at this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334993 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
//===- BasicBlockUtils.cpp - Unit tests for BasicBlockUtils ---------------===//
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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/BasicBlockUtils.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/Support/SourceMgr.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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static std::unique_ptr<Module> parseIR(LLVMContext &C, const char *IR) {
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SMDiagnostic Err;
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std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
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if (!Mod)
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Err.print("BasicBlockUtilsTests", errs());
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return Mod;
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}
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TEST(BasicBlockUtils, SplitBlockPredecessors) {
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LLVMContext C;
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std::unique_ptr<Module> M = parseIR(
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C,
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"define i32 @basic_func(i1 %cond) {\n"
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"entry:\n"
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" br i1 %cond, label %bb0, label %bb1\n"
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"bb0:\n"
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" br label %bb1\n"
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"bb1:\n"
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" %phi = phi i32 [ 0, %entry ], [ 1, %bb0 ]"
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" ret i32 %phi\n"
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"}\n"
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"\n"
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);
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auto *F = M->getFunction("basic_func");
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DominatorTree DT(*F);
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// Make sure the dominator tree is properly updated if calling this on the
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// entry block.
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SplitBlockPredecessors(&F->getEntryBlock(), {}, "split.entry", &DT);
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EXPECT_TRUE(DT.verify());
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}
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