From 28552da9c3c8bc9865b9cff4fe64dad9da7a57a3 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Thu, 28 Jun 2007 23:09:25 +0000
Subject: [PATCH] Fix PR 1526.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37780 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Other/2007-06-28-PassManager.ll |  5 ++++
 tools/opt/opt.cpp                    | 34 ++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 test/Other/2007-06-28-PassManager.ll

diff --git a/test/Other/2007-06-28-PassManager.ll b/test/Other/2007-06-28-PassManager.ll
new file mode 100644
index 00000000000..b0d83d0a0c6
--- /dev/null
+++ b/test/Other/2007-06-28-PassManager.ll
@@ -0,0 +1,5 @@
+; RUN:  llvm-as < %s |  opt -analyze -inline -disable-output
+; PR 1526
+define i32 @test1() {
+       ret i32 0;
+}
diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index 14e02d0e467..e6ff5ec4a25 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -14,10 +14,12 @@
 
 #include "llvm/Module.h"
 #include "llvm/PassManager.h"
+#include "llvm/CallGraphSCCPass.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/Assembly/PrintModulePass.h"
 #include "llvm/Analysis/Verifier.h"
 #include "llvm/Analysis/LoopPass.h"
+#include "llvm/Analysis/CallGraph.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/PassNameParser.h"
@@ -94,6 +96,36 @@ AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
 // ---------- Define Printers for module and function passes ------------
 namespace {
 
+struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
+  static char ID;
+  const PassInfo *PassToPrint;
+  CallGraphSCCPassPrinter(const PassInfo *PI) : 
+    CallGraphSCCPass((intptr_t)&ID), PassToPrint(PI) {}
+
+  virtual bool runOnSCC(const std::vector<CallGraphNode *>&SCC) {
+    if (!Quiet) {
+      cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+
+      for (unsigned i = 0, e = SCC.size(); i != e; ++i) {
+        Function *F = SCC[i]->getFunction();
+        if (F) 
+          getAnalysisID<Pass>(PassToPrint).print(cout, F->getParent());
+      }
+    }
+    // Get and print pass...
+    return false;
+  }
+  
+  virtual const char *getPassName() const { return "'Pass' Printer"; }
+
+  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    AU.addRequiredID(PassToPrint);
+    AU.setPreservesAll();
+  }
+};
+
+char CallGraphSCCPassPrinter::ID = 0;
+
 struct ModulePassPrinter : public ModulePass {
   static char ID;
   const PassInfo *PassToPrint;
@@ -342,6 +374,8 @@ int main(int argc, char **argv) {
             Passes.add(new BasicBlockPassPrinter(PassInf));
           else if (dynamic_cast<FunctionPass*>(P))
             Passes.add(new FunctionPassPrinter(PassInf));
+          else if (dynamic_cast<CallGraphSCCPass*>(P))
+            Passes.add(new CallGraphSCCPassPrinter(PassInf));
           else
             Passes.add(new ModulePassPrinter(PassInf));
         }
-- 
2.34.1