It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Hello/Hello.cpp b/lib/Transforms/Hello/Hello.cpp
new file mode 100644
index 0000000..a437215
--- /dev/null
+++ b/lib/Transforms/Hello/Hello.cpp
@@ -0,0 +1,64 @@
+//===- Hello.cpp - Example code from "Writing an LLVM Pass" ---------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements two versions of the LLVM "Hello World" pass described
+// in docs/WritingAnLLVMPass.html
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "hello"
+#include "llvm/Pass.h"
+#include "llvm/Function.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/ADT/Statistic.h"
+using namespace llvm;
+
+STATISTIC(HelloCounter, "Counts number of functions greeted");
+
+namespace {
+ // Hello - The first implementation, without getAnalysisUsage.
+ struct Hello : public FunctionPass {
+ static char ID; // Pass identification, replacement for typeid
+ Hello() : FunctionPass((intptr_t)&ID) {}
+
+ virtual bool runOnFunction(Function &F) {
+ HelloCounter++;
+ std::string fname = F.getName();
+ EscapeString(fname);
+ cerr << "Hello: " << fname << "\n";
+ return false;
+ }
+ };
+
+ char Hello::ID = 0;
+ RegisterPass<Hello> X("hello", "Hello World Pass");
+
+ // Hello2 - The second implementation with getAnalysisUsage implemented.
+ struct Hello2 : public FunctionPass {
+ static char ID; // Pass identification, replacement for typeid
+ Hello2() : FunctionPass((intptr_t)&ID) {}
+
+ virtual bool runOnFunction(Function &F) {
+ HelloCounter++;
+ std::string fname = F.getName();
+ EscapeString(fname);
+ cerr << "Hello: " << fname << "\n";
+ return false;
+ }
+
+ // We don't modify the program, so we preserve all analyses
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ };
+ };
+ char Hello2::ID = 0;
+ RegisterPass<Hello2> Y("hello2",
+ "Hello World Pass (with getAnalysisUsage implemented)");
+}