Get rid of static constructors for pass registration. Instead, every pass exposes...

[oota-llvm.git] / lib / Transforms / Scalar / LowerAtomic.cpp

diff --git a/lib/Transforms/Scalar/LowerAtomic.cpp b/lib/Transforms/Scalar/LowerAtomic.cpp
index 11f52570e18da97d98e8bd73c9966c3030bd7be8..9087b46c138b638b9023d6d02037474622fe3117 100644 (file)
--- a/lib/Transforms/Scalar/LowerAtomic.cpp
+++ b/lib/Transforms/Scalar/LowerAtomic.cpp
@@ -14,26 +14,15 @@
 
 #define DEBUG_TYPE "loweratomic"
 #include "llvm/Transforms/Scalar.h"
-#include "llvm/BasicBlock.h"
 #include "llvm/Function.h"
-#include "llvm/Instruction.h"
-#include "llvm/Instructions.h"
-#include "llvm/Intrinsics.h"
+#include "llvm/IntrinsicInst.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/IRBuilder.h"
-
 using namespace llvm;
 
-namespace {
-
-bool LowerAtomicIntrinsic(CallInst *CI) {
-  IRBuilder<> Builder(CI->getParent(), CI);
-
-  Function *Callee = CI->getCalledFunction();
-  if (!Callee)
-    return false;
-
-  unsigned IID = Callee->getIntrinsicID();
+static bool LowerAtomicIntrinsic(IntrinsicInst *II) {
+  IRBuilder<> Builder(II->getParent(), II);
+  unsigned IID = II->getIntrinsicID();
   switch (IID) {
   case Intrinsic::memory_barrier:
     break;
@@ -48,80 +37,70 @@ bool LowerAtomicIntrinsic(CallInst *CI) {
   case Intrinsic::atomic_load_min:
   case Intrinsic::atomic_load_umax:
   case Intrinsic::atomic_load_umin: {
-    Value *Ptr = CI->getArgOperand(0);
-    Value *Delta = CI->getArgOperand(1);
+    Value *Ptr = II->getArgOperand(0), *Delta = II->getArgOperand(1);
 
     LoadInst *Orig = Builder.CreateLoad(Ptr);
-    Value *Res;
+    Value *Res = NULL;
     switch (IID) {
-      case Intrinsic::atomic_load_add:
-        Res = Builder.CreateAdd(Orig, Delta);
-        break;
-      case Intrinsic::atomic_load_sub:
-        Res = Builder.CreateSub(Orig, Delta);
-        break;
-      case Intrinsic::atomic_load_and:
-        Res = Builder.CreateAnd(Orig, Delta);
-        break;
-      case Intrinsic::atomic_load_nand:
-        Res = Builder.CreateNot(Builder.CreateAnd(Orig, Delta));
-        break;
-      case Intrinsic::atomic_load_or:
-        Res = Builder.CreateOr(Orig, Delta);
-        break;
-      case Intrinsic::atomic_load_xor:
-        Res = Builder.CreateXor(Orig, Delta);
-        break;
-      case Intrinsic::atomic_load_max:
-        Res = Builder.CreateSelect(Builder.CreateICmpSLT(Orig, Delta),
-                                   Delta,
-                                   Orig);
-        break;
-      case Intrinsic::atomic_load_min:
-        Res = Builder.CreateSelect(Builder.CreateICmpSLT(Orig, Delta),
-                                   Orig,
-                                   Delta);
-        break;
-      case Intrinsic::atomic_load_umax:
-        Res = Builder.CreateSelect(Builder.CreateICmpULT(Orig, Delta),
-                                   Delta,
-                                   Orig);
-        break;
-      case Intrinsic::atomic_load_umin:
-        Res = Builder.CreateSelect(Builder.CreateICmpULT(Orig, Delta),
-                                   Orig,
-                                   Delta);
-        break;
-      default: assert(0 && "Unrecognized atomic modify operation");
+    default: assert(0 && "Unrecognized atomic modify operation");
+    case Intrinsic::atomic_load_add:
+      Res = Builder.CreateAdd(Orig, Delta);
+      break;
+    case Intrinsic::atomic_load_sub:
+      Res = Builder.CreateSub(Orig, Delta);
+      break;
+    case Intrinsic::atomic_load_and:
+      Res = Builder.CreateAnd(Orig, Delta);
+      break;
+    case Intrinsic::atomic_load_nand:
+      Res = Builder.CreateNot(Builder.CreateAnd(Orig, Delta));
+      break;
+    case Intrinsic::atomic_load_or:
+      Res = Builder.CreateOr(Orig, Delta);
+      break;
+    case Intrinsic::atomic_load_xor:
+      Res = Builder.CreateXor(Orig, Delta);
+      break;
+    case Intrinsic::atomic_load_max:
+      Res = Builder.CreateSelect(Builder.CreateICmpSLT(Orig, Delta),
+                                 Delta, Orig);
+      break;
+    case Intrinsic::atomic_load_min:
+      Res = Builder.CreateSelect(Builder.CreateICmpSLT(Orig, Delta),
+                                 Orig, Delta);
+      break;
+    case Intrinsic::atomic_load_umax:
+      Res = Builder.CreateSelect(Builder.CreateICmpULT(Orig, Delta),
+                                 Delta, Orig);
+      break;
+    case Intrinsic::atomic_load_umin:
+      Res = Builder.CreateSelect(Builder.CreateICmpULT(Orig, Delta),
+                                 Orig, Delta);
+      break;
     }
     Builder.CreateStore(Res, Ptr);
 
-    CI->replaceAllUsesWith(Orig);
+    II->replaceAllUsesWith(Orig);
     break;
   }
 
   case Intrinsic::atomic_swap: {
-    Value *Ptr = CI->getArgOperand(0);
-    Value *Val = CI->getArgOperand(1);
-
+    Value *Ptr = II->getArgOperand(0), *Val = II->getArgOperand(1);
     LoadInst *Orig = Builder.CreateLoad(Ptr);
     Builder.CreateStore(Val, Ptr);
-
-    CI->replaceAllUsesWith(Orig);
+    II->replaceAllUsesWith(Orig);
     break;
   }
 
   case Intrinsic::atomic_cmp_swap: {
-    Value *Ptr = CI->getArgOperand(0);
-    Value *Cmp = CI->getArgOperand(1);
-    Value *Val = CI->getArgOperand(2);
+    Value *Ptr = II->getArgOperand(0), *Cmp = II->getArgOperand(1);
+    Value *Val = II->getArgOperand(2);
 
     LoadInst *Orig = Builder.CreateLoad(Ptr);
     Value *Equal = Builder.CreateICmpEQ(Orig, Cmp);
     Value *Res = Builder.CreateSelect(Equal, Val, Orig);
     Builder.CreateStore(Res, Ptr);
-
-    CI->replaceAllUsesWith(Orig);
+    II->replaceAllUsesWith(Orig);
     break;
   }
 
@@ -129,32 +108,32 @@ bool LowerAtomicIntrinsic(CallInst *CI) {
     return false;
   }
 
-  assert(CI->use_empty() &&
+  assert(II->use_empty() &&
          "Lowering should have eliminated any uses of the intrinsic call!");
-  CI->eraseFromParent();
+  II->eraseFromParent();
 
   return true;
 }
 
-struct LowerAtomic : public BasicBlockPass {
-  static char ID;
-  LowerAtomic() : BasicBlockPass(&ID) {}
-  bool runOnBasicBlock(BasicBlock &BB) {
-    bool Changed = false;
-    for (BasicBlock::iterator DI = BB.begin(), DE = BB.end(); DI != DE; ) {
-      Instruction *Inst = DI++;
-      if (CallInst *CI = dyn_cast<CallInst>(Inst))
-        Changed |= LowerAtomicIntrinsic(CI);
+namespace {
+  struct LowerAtomic : public BasicBlockPass {
+    static char ID;
+    LowerAtomic() : BasicBlockPass(ID) {
+      initializeLowerAtomicPass(*PassRegistry::getPassRegistry());
     }
-    return Changed;
-  }
-
-};
-
+    bool runOnBasicBlock(BasicBlock &BB) {
+      bool Changed = false;
+      for (BasicBlock::iterator DI = BB.begin(), DE = BB.end(); DI != DE; )
+        if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(DI++))
+          Changed |= LowerAtomicIntrinsic(II);
+      return Changed;
+    }
+  };
 }
 
 char LowerAtomic::ID = 0;
-static RegisterPass<LowerAtomic>
-X("loweratomic", "Lower atomic intrinsics to non-atomic form");
+INITIALIZE_PASS(LowerAtomic, "loweratomic",
+                "Lower atomic intrinsics to non-atomic form",
+                false, false)
 
 Pass *llvm::createLowerAtomicPass() { return new LowerAtomic(); }