From 1bbbdebc9efbfe5c2796db41cdfed1fb2d655653 Mon Sep 17 00:00:00 2001
From: Andrzej Warzynski <andrzej.warzynski@gmail.com>
Date: Sat, 17 Jul 2021 19:13:16 +0100
Subject: [PATCH] Fix #39

Background and solution identical to the previous patch.
---
 README.md                   | 2 +-
 include/StaticCallCounter.h | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index b72a2ef6..ea5fcdef 100644
--- a/README.md
+++ b/README.md
@@ -440,7 +440,7 @@ to test **StaticCallCounter**:
 ```bash
 export LLVM_DIR=<installation/dir/of/llvm/12>
 # Generate an LLVM file to analyze
-$LLVM_DIR/bin/clang -O1 -emit-llvm -c <source_dir>/inputs/input_for_cc.c -o input_for_cc.bc
+$LLVM_DIR/bin/clang -emit-llvm -c <source_dir>/inputs/input_for_cc.c -o input_for_cc.bc
 # Run the pass through opt - Legacy PM
 $LLVM_DIR/bin/opt -load <build_dir>/lib/libStaticCallCounter.so -legacy-static-cc -analyze input_for_cc.bc
 ```
diff --git a/include/StaticCallCounter.h b/include/StaticCallCounter.h
index 7575aa3f..8d7551c4 100644
--- a/include/StaticCallCounter.h
+++ b/include/StaticCallCounter.h
@@ -29,6 +29,9 @@ struct StaticCallCounter : public llvm::AnalysisInfoMixin<StaticCallCounter> {
   using Result = ResultStaticCC;
   Result run(llvm::Module &M, llvm::ModuleAnalysisManager &);
   Result runOnModule(llvm::Module &M);
+  // Part of the official API:
+  //  https://llvm.org/docs/WritingAnLLVMNewPMPass.html#required-passes
+  static bool isRequired() { return true; }
 
 private:
   // A special type used by analysis passes to provide an address that
@@ -46,6 +49,9 @@ class StaticCallCounterPrinter
   explicit StaticCallCounterPrinter(llvm::raw_ostream &OutS) : OS(OutS) {}
   llvm::PreservedAnalyses run(llvm::Module &M,
                               llvm::ModuleAnalysisManager &MAM);
+  // Part of the official API:
+  //  https://llvm.org/docs/WritingAnLLVMNewPMPass.html#required-passes
+  static bool isRequired() { return true; }
 
 private:
   llvm::raw_ostream &OS;