[PM] Port LowerInvoke to the new pass manager

llvm-svn: 278531

llvm/include/llvm/InitializePasses.h

@@ -205,7 +205,7 @@ void initializeLowerEmuTLSPass(PassRegistry&);
 void initializeLowerExpectIntrinsicPass(PassRegistry&);
 void initializeLowerGuardIntrinsicLegacyPassPass(PassRegistry&);
 void initializeLowerIntrinsicsPass(PassRegistry&);
-void initializeLowerInvokePass(PassRegistry&);
+void initializeLowerInvokeLegacyPassPass(PassRegistry&);
 void initializeLowerSwitchPass(PassRegistry&);
 void initializeLowerTypeTestsPass(PassRegistry&);
 void initializeMIRPrintingPassPass(PassRegistry&);

llvm/include/llvm/Transforms/Utils/LowerInvoke.h

@@ -0,0 +1,30 @@
+//===- LowerInvoke.h - Eliminate Invoke instructions ----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This transformation is designed for use by code generators which do not yet
+// support stack unwinding.  This pass converts 'invoke' instructions to 'call'
+// instructions, so that any exception-handling 'landingpad' blocks become dead
+// code (which can be removed by running the '-simplifycfg' pass afterwards).
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_TRANSFORMS_UTILS_LOWERINVOKE_H
+#define LLVM_TRANSFORMS_UTILS_LOWERINVOKE_H
+
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+class LowerInvokePass : public PassInfoMixin<LowerInvokePass> {
+public:
+  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+};
+
+}
+
+#endif // LLVM_TRANSFORMS_UTILS_LOWERINVOKE_H

llvm/lib/Passes/PassBuilder.cpp

@@ -119,6 +119,7 @@
 #include "llvm/Transforms/Utils/BreakCriticalEdges.h"
 #include "llvm/Transforms/Utils/LCSSA.h"
 #include "llvm/Transforms/Utils/LoopSimplify.h"
+#include "llvm/Transforms/Utils/LowerInvoke.h"
 #include "llvm/Transforms/Utils/Mem2Reg.h"
 #include "llvm/Transforms/Utils/MemorySSA.h"
 #include "llvm/Transforms/Utils/NameAnonFunctions.h"

llvm/lib/Passes/PassRegistry.def

@@ -151,6 +151,7 @@ FUNCTION_PASS("lower-guard-intrinsic", LowerGuardIntrinsicPass())
 FUNCTION_PASS("guard-widening", GuardWideningPass())
 FUNCTION_PASS("gvn", GVN())
 FUNCTION_PASS("loop-simplify", LoopSimplifyPass())
+FUNCTION_PASS("lowerinvoke", LowerInvokePass())
 FUNCTION_PASS("mem2reg", PromotePass())
 FUNCTION_PASS("memcpyopt", MemCpyOptPass())
 FUNCTION_PASS("mldst-motion", MergedLoadStoreMotionPass())

llvm/lib/Transforms/Utils/LowerInvoke.cpp

@@ -14,6 +14,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Transforms/Utils/LowerInvoke.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/IR/Instructions.h"
@@ -28,36 +29,29 @@ using namespace llvm;
 STATISTIC(NumInvokes, "Number of invokes replaced");
 
 namespace {
-  class LowerInvoke : public FunctionPass {
+  class LowerInvokeLegacyPass : public FunctionPass {
   public:
     static char ID; // Pass identification, replacement for typeid
-    explicit LowerInvoke() : FunctionPass(ID) {
-      initializeLowerInvokePass(*PassRegistry::getPassRegistry());
+    explicit LowerInvokeLegacyPass() : FunctionPass(ID) {
+      initializeLowerInvokeLegacyPassPass(*PassRegistry::getPassRegistry());
     }
     bool runOnFunction(Function &F) override;
   };
 }
 
-char LowerInvoke::ID = 0;
-INITIALIZE_PASS(LowerInvoke, "lowerinvoke",
+char LowerInvokeLegacyPass::ID = 0;
+INITIALIZE_PASS(LowerInvokeLegacyPass, "lowerinvoke",
                 "Lower invoke and unwind, for unwindless code generators",
                 false, false)
 
-char &llvm::LowerInvokePassID = LowerInvoke::ID;
-
-// Public Interface To the LowerInvoke pass.
-FunctionPass *llvm::createLowerInvokePass() {
-  return new LowerInvoke();
-}
-
-bool LowerInvoke::runOnFunction(Function &F) {
+static bool runImpl(Function &F) {
   bool Changed = false;
   for (BasicBlock &BB : F)
     if (InvokeInst *II = dyn_cast<InvokeInst>(BB.getTerminator())) {
-      SmallVector<Value*,16> CallArgs(II->op_begin(), II->op_end() - 3);
+      SmallVector<Value *, 16> CallArgs(II->op_begin(), II->op_end() - 3);
       // Insert a normal call instruction...
-      CallInst *NewCall = CallInst::Create(II->getCalledValue(),
-                                           CallArgs, "", II);
+      CallInst *NewCall =
+          CallInst::Create(II->getCalledValue(), CallArgs, "", II);
       NewCall->takeName(II);
       NewCall->setCallingConv(II->getCallingConv());
       NewCall->setAttributes(II->getAttributes());
@@ -73,7 +67,28 @@ bool LowerInvoke::runOnFunction(Function &F) {
       // Remove the invoke instruction now.
       BB.getInstList().erase(II);
 
-      ++NumInvokes; Changed = true;
+      ++NumInvokes;
+      Changed = true;
     }
   return Changed;
 }
+
+bool LowerInvokeLegacyPass::runOnFunction(Function &F) {
+  return runImpl(F);
+}
+
+namespace llvm {
+char &LowerInvokePassID = LowerInvokeLegacyPass::ID;
+
+// Public Interface To the LowerInvoke pass.
+FunctionPass *createLowerInvokePass() { return new LowerInvokeLegacyPass(); }
+
+PreservedAnalyses LowerInvokePass::run(Function &F,
+                                       FunctionAnalysisManager &AM) {
+  bool Changed = runImpl(F);
+  if (!Changed)
+    return PreservedAnalyses::all();
+
+  return PreservedAnalyses::none();
+}
+}

llvm/lib/Transforms/Utils/Utils.cpp

@@ -26,7 +26,7 @@ void llvm::initializeTransformUtils(PassRegistry &Registry) {
   initializeInstNamerPass(Registry);
   initializeLCSSAWrapperPassPass(Registry);
   initializeLoopSimplifyPass(Registry);
-  initializeLowerInvokePass(Registry);
+  initializeLowerInvokeLegacyPassPass(Registry);
   initializeLowerSwitchPass(Registry);
   initializeNameAnonFunctionLegacyPassPass(Registry);
   initializePromoteLegacyPassPass(Registry);

llvm/test/Transforms/LowerInvoke/lowerinvoke.ll

@@ -1,4 +1,5 @@
 ; RUN: opt < %s -lowerinvoke -S | FileCheck %s
+; RUN: opt < %s -passes='lowerinvoke' -S | FileCheck %s
 
 declare i32 @external_func(i64 %arg)