Filtering IR printing for print-after-all/print-before-all

Summary:
This patch implements "-print-funcs" option to support function filtering for IR printing like -print-after-all, -print-before etc.
Examples:
  -print-after-all -print-funcs=foo,bar

Reviewers: mcrosier, joker.eph

Subscribers: tejohnson, joker.eph, llvm-commits

Differential Revision: http://reviews.llvm.org/D15776

llvm-svn: 256952

1 files changed, 13 insertions, 0 deletions

diff --git a/llvm/lib/IR/LegacyPassManager.cpp b/llvm/lib/IR/LegacyPassManager.cpp
index f2e0c7d..63d89f2 100644
--- a/llvm/lib/IR/LegacyPassManager.cpp
+++ b/llvm/lib/IR/LegacyPassManager.cpp
@@ -28,6 +28,7 @@
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 #include <map>
+#include <unordered_set>
 using namespace llvm;
 using namespace llvm::legacy;
 
@@ -83,6 +84,13 @@ PrintAfterAll("print-after-all",
               llvm::cl::desc("Print IR after each pass"),
               cl::init(false));
 
+static cl::list<std::string>
+    PrintFuncsList("filter-print-funcs", cl::value_desc("function names"),
+                   cl::desc("Only print IR for functions whose name "
+                            "match this for all print-[before|after][-all] "
+                            "options"),
+                   cl::CommaSeparated);
+
 /// This is a helper to determine whether to print IR before or
 /// after a pass.
 
@@ -109,6 +117,11 @@ static bool ShouldPrintAfterPass(const PassInfo *PI) {
   return PrintAfterAll || ShouldPrintBeforeOrAfterPass(PI, PrintAfter);
 }
 
+bool llvm::isFunctionInPrintList(StringRef FunctionName) {
+  static std::unordered_set<std::string> PrintFuncNames(PrintFuncsList.begin(),
+                                                        PrintFuncsList.end());
+  return PrintFuncNames.empty() || PrintFuncNames.count(FunctionName);
+}
 /// isPassDebuggingExecutionsOrMore - Return true if -debug-pass=Executions
 /// or higher is specified.
 bool PMDataManager::isPassDebuggingExecutionsOrMore() const {