Ok, third time's the charm. No changes from last time except the CMake
source addition. Apparently the buildbots were wrong about failures.
---
Add some switches helpful for debugging:
-print-before=<Pass Name>
Dump IR before running pass <Pass Name>.
-print-before-all
Dump IR before running each pass.
-print-after-all
Dump IR after running each pass.
These are helpful when tracking down a miscompilation. It is easy to
get IR dumps and do diffs on them, etc.
To make this work well, add a new getPrinterPass API to Pass so that
each kind of pass (ModulePass, FunctionPass, etc.) can create a Pass
suitable for dumping out the kind of object the Pass works on.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100249 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/IPA/CallGraphSCCPass.cpp b/lib/Analysis/IPA/CallGraphSCCPass.cpp
index 0f39f44..fb08041 100644
--- a/lib/Analysis/IPA/CallGraphSCCPass.cpp
+++ b/lib/Analysis/IPA/CallGraphSCCPass.cpp
@@ -87,10 +87,40 @@
bool IsCheckingMode);
};
+/// PrintCallGraphPass - Print a Module corresponding to a call graph.
+///
+class PrintCallGraphPass : public CallGraphSCCPass {
+private:
+ std::string Banner;
+ raw_ostream &Out; // raw_ostream to print on.
+
+public:
+ static char ID;
+ PrintCallGraphPass() : CallGraphSCCPass(&ID), Out(dbgs()) {}
+ PrintCallGraphPass(const std::string &B, raw_ostream &o)
+ : CallGraphSCCPass(&ID), Banner(B), Out(o) {}
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ }
+
+ bool runOnSCC(std::vector<CallGraphNode *> &SCC) {
+ Out << Banner;
+ for (std::vector<CallGraphNode *>::iterator n = SCC.begin(), ne = SCC.end();
+ n != ne;
+ ++n) {
+ (*n)->getFunction()->print(Out);
+ }
+ return false;
+ }
+};
+
} // end anonymous namespace.
char CGPassManager::ID = 0;
+char PrintCallGraphPass::ID = 0;
+
bool CGPassManager::RunPassOnSCC(Pass *P, std::vector<CallGraphNode*> &CurSCC,
CallGraph &CG, bool &CallGraphUpToDate) {
bool Changed = false;
@@ -396,6 +426,11 @@
return Changed;
}
+Pass *CallGraphSCCPass::createPrinterPass(raw_ostream &O,
+ const std::string &Banner) const {
+ return new PrintCallGraphPass(Banner, O);
+}
+
/// Assign pass manager to manage this pass.
void CallGraphSCCPass::assignPassManager(PMStack &PMS,
PassManagerType PreferredType) {