Add a new trivial -inst-namer pass which makes it possible to diff the
before/after effects of a pass, crazy!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55230 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/InstructionNamer.cpp b/lib/Transforms/Utils/InstructionNamer.cpp
new file mode 100644
index 0000000..f0e77c9
--- /dev/null
+++ b/lib/Transforms/Utils/InstructionNamer.cpp
@@ -0,0 +1,49 @@
+//===- InstructionNamer.cpp - Give anonymous instructions names -----------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is a little utility pass that gives instructions names, this is mostly
+// useful when diffing the effect of an optimization because deleting an
+// unnamed instruction can change all other instruction numbering, making the
+// diff very noisy.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/Function.h"
+#include "llvm/Pass.h"
+#include "llvm/Type.h"
+using namespace llvm;
+
+namespace {
+ struct InstNamer : public FunctionPass {
+ static char ID; // Pass identification, replacement for typeid
+ InstNamer() : FunctionPass(&ID) {}
+
+ bool runOnFunction(Function &F) {
+ for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
+ for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I)
+ if (!I->hasName() && I->getType() != Type::VoidTy)
+ I->setName("tmp");
+ return true;
+ }
+ };
+
+ char InstNamer::ID = 0;
+ static RegisterPass<InstNamer> X("instnamer",
+ "Assign names to anonymous instructions");
+}
+
+
+//===----------------------------------------------------------------------===//
+//
+// InstructionNamer - Give any unnamed non-void instructions "tmp" names.
+//
+FunctionPass *llvm::createInstructionNamerPass() {
+ return new InstNamer();
+}