vendor/llvm/llvm-trunk-r351319

1 files changed, 198 insertions, 0 deletions

diff --git a/unittests/Transforms/Utils/CodeExtractorTest.cpp b/unittests/Transforms/Utils/CodeExtractorTest.cpp
new file mode 100644
index 0000000000000..7e3512f56f32a
--- /dev/null
+++ b/unittests/Transforms/Utils/CodeExtractorTest.cpp
@@ -0,0 +1,198 @@
+//===- CodeExtractor.cpp - Unit tests for CodeExtractor -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/Utils/CodeExtractor.h"
+#include "llvm/AsmParser/Parser.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/Dominators.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/Support/SourceMgr.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+namespace {
+BasicBlock *getBlockByName(Function *F, StringRef name) {
+  for (auto &BB : *F)
+    if (BB.getName() == name)
+      return &BB;
+  return nullptr;
+}
+
+TEST(CodeExtractor, ExitStub) {
+  LLVMContext Ctx;
+  SMDiagnostic Err;
+  std::unique_ptr<Module> M(parseAssemblyString(R"invalid(
+    define i32 @foo(i32 %x, i32 %y, i32 %z) {
+    header:
+      %0 = icmp ugt i32 %x, %y
+      br i1 %0, label %body1, label %body2
+
+    body1:
+      %1 = add i32 %z, 2
+      br label %notExtracted
+
+    body2:
+      %2 = mul i32 %z, 7
+      br label %notExtracted
+
+    notExtracted:
+      %3 = phi i32 [ %1, %body1 ], [ %2, %body2 ]
+      %4 = add i32 %3, %x
+      ret i32 %4
+    }
+  )invalid",
+                                                Err, Ctx));
+
+  Function *Func = M->getFunction("foo");
+  SmallVector<BasicBlock *, 3> Candidates{ getBlockByName(Func, "header"),
+                                           getBlockByName(Func, "body1"),
+                                           getBlockByName(Func, "body2") };
+
+  DominatorTree DT(*Func);
+  CodeExtractor CE(Candidates, &DT);
+  EXPECT_TRUE(CE.isEligible());
+
+  Function *Outlined = CE.extractCodeRegion();
+  EXPECT_TRUE(Outlined);
+  BasicBlock *Exit = getBlockByName(Func, "notExtracted");
+  BasicBlock *ExitSplit = getBlockByName(Outlined, "notExtracted.split");
+  // Ensure that PHI in exit block has only one incoming value (from code
+  // replacer block).
+  EXPECT_TRUE(Exit && cast<PHINode>(Exit->front()).getNumIncomingValues() == 1);
+  // Ensure that there is a PHI in outlined function with 2 incoming values.
+  EXPECT_TRUE(ExitSplit &&
+              cast<PHINode>(ExitSplit->front()).getNumIncomingValues() == 2);
+  EXPECT_FALSE(verifyFunction(*Outlined));
+  EXPECT_FALSE(verifyFunction(*Func));
+}
+
+TEST(CodeExtractor, ExitPHIOnePredFromRegion) {
+  LLVMContext Ctx;
+  SMDiagnostic Err;
+  std::unique_ptr<Module> M(parseAssemblyString(R"invalid(
+    define i32 @foo() {
+    header:
+      br i1 undef, label %extracted1, label %pred
+
+    pred:
+      br i1 undef, label %exit1, label %exit2
+
+    extracted1:
+      br i1 undef, label %extracted2, label %exit1
+
+    extracted2:
+      br label %exit2
+
+    exit1:
+      %0 = phi i32 [ 1, %extracted1 ], [ 2, %pred ]
+      ret i32 %0
+
+    exit2:
+      %1 = phi i32 [ 3, %extracted2 ], [ 4, %pred ]
+      ret i32 %1
+    }
+  )invalid", Err, Ctx));
+
+  Function *Func = M->getFunction("foo");
+  SmallVector<BasicBlock *, 2> ExtractedBlocks{
+    getBlockByName(Func, "extracted1"),
+    getBlockByName(Func, "extracted2")
+  };
+
+  DominatorTree DT(*Func);
+  CodeExtractor CE(ExtractedBlocks, &DT);
+  EXPECT_TRUE(CE.isEligible());
+
+  Function *Outlined = CE.extractCodeRegion();
+  EXPECT_TRUE(Outlined);
+  BasicBlock *Exit1 = getBlockByName(Func, "exit1");
+  BasicBlock *Exit2 = getBlockByName(Func, "exit2");
+  // Ensure that PHIs in exits are not splitted (since that they have only one
+  // incoming value from extracted region).
+  EXPECT_TRUE(Exit1 &&
+          cast<PHINode>(Exit1->front()).getNumIncomingValues() == 2);
+  EXPECT_TRUE(Exit2 &&
+          cast<PHINode>(Exit2->front()).getNumIncomingValues() == 2);
+  EXPECT_FALSE(verifyFunction(*Outlined));
+  EXPECT_FALSE(verifyFunction(*Func));
+}
+
+TEST(CodeExtractor, StoreOutputInvokeResultAfterEHPad) {
+  LLVMContext Ctx;
+  SMDiagnostic Err;
+  std::unique_ptr<Module> M(parseAssemblyString(R"invalid(
+    declare i8 @hoge()
+
+    define i32 @foo() personality i8* null {
+      entry:
+        %call = invoke i8 @hoge()
+                to label %invoke.cont unwind label %lpad
+
+      invoke.cont:                                      ; preds = %entry
+        unreachable
+
+      lpad:                                             ; preds = %entry
+        %0 = landingpad { i8*, i32 }
+                catch i8* null
+        br i1 undef, label %catch, label %finally.catchall
+
+      catch:                                            ; preds = %lpad
+        %call2 = invoke i8 @hoge()
+                to label %invoke.cont2 unwind label %lpad2
+
+      invoke.cont2:                                    ; preds = %catch
+        %call3 = invoke i8 @hoge()
+                to label %invoke.cont3 unwind label %lpad2
+
+      invoke.cont3:                                    ; preds = %invoke.cont2
+        unreachable
+
+      lpad2:                                           ; preds = %invoke.cont2, %catch
+        %ex.1 = phi i8* [ undef, %invoke.cont2 ], [ null, %catch ]
+        %1 = landingpad { i8*, i32 }
+                catch i8* null
+        br label %finally.catchall
+
+      finally.catchall:                                 ; preds = %lpad33, %lpad
+        %ex.2 = phi i8* [ %ex.1, %lpad2 ], [ null, %lpad ]
+        unreachable
+    }
+  )invalid", Err, Ctx));
+
+	if (!M) {
+    Err.print("unit", errs());
+    exit(1);
+  }
+
+  Function *Func = M->getFunction("foo");
+  EXPECT_FALSE(verifyFunction(*Func, &errs()));
+
+  SmallVector<BasicBlock *, 2> ExtractedBlocks{
+    getBlockByName(Func, "catch"),
+    getBlockByName(Func, "invoke.cont2"),
+    getBlockByName(Func, "invoke.cont3"),
+    getBlockByName(Func, "lpad2")
+  };
+
+  DominatorTree DT(*Func);
+  CodeExtractor CE(ExtractedBlocks, &DT);
+  EXPECT_TRUE(CE.isEligible());
+
+  Function *Outlined = CE.extractCodeRegion();
+  EXPECT_TRUE(Outlined);
+  EXPECT_FALSE(verifyFunction(*Outlined, &errs()));
+  EXPECT_FALSE(verifyFunction(*Func, &errs()));
+}
+
+} // end anonymous namespace