[PATCH] D108146: [OpenMP][NFC] Add option to print module after OpenMPOpt for debugging

[Joseph Huber via Phabricator via llvm-commits]

jhuber6 created this revision.
jhuber6 added a reviewer: jdoerfert.
Herald added subscribers: ormris, guansong, hiraditya, yaxunl.
jhuber6 requested review of this revision.
Herald added subscribers: llvm-commits, sstefan1.
Herald added a project: LLVM.

This patch adds an extra option to print the module after running one of
the OpenMPOpt passes if debugging is enabled. This makes it much easier
to inspect the effects of this pass when doing debugging.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D108146

Files:
  llvm/lib/Transforms/IPO/OpenMPOpt.cpp


Index: llvm/lib/Transforms/IPO/OpenMPOpt.cpp
===================================================================
--- llvm/lib/Transforms/IPO/OpenMPOpt.cpp
+++ llvm/lib/Transforms/IPO/OpenMPOpt.cpp
@@ -92,6 +92,11 @@
     cl::desc("Disable OpenMP optimizations that replace the state machine."),
     cl::Hidden, cl::init(false));
 
+static cl::opt<bool> PrintModuleAfterOptimizations(
+    "openmp-opt-print-module", cl::ZeroOrMore,
+    cl::desc("Print the current module after OpenMP optimizations."),
+    cl::Hidden, cl::init(false));
+
 STATISTIC(NumOpenMPRuntimeCallsDeduplicated,
           "Number of OpenMP runtime calls deduplicated");
 STATISTIC(NumOpenMPParallelRegionsDeleted,
@@ -4473,6 +4478,10 @@
 
   OpenMPOpt OMPOpt(SCC, CGUpdater, OREGetter, InfoCache, A);
   bool Changed = OMPOpt.run(true);
+
+  if (PrintModuleAfterOptimizations)
+    LLVM_DEBUG(dbgs() << TAG << "Module after OpenMPOpt Module Pass:\n" << M);
+
   if (Changed)
     return PreservedAnalyses::none();
 
@@ -4525,6 +4534,10 @@
 
   OpenMPOpt OMPOpt(SCC, CGUpdater, OREGetter, InfoCache, A);
   bool Changed = OMPOpt.run(false);
+
+  if (PrintModuleAfterOptimizations)
+    LLVM_DEBUG(dbgs() << TAG << "Module after OpenMPOpt CGSCC Pass:\n" << M);
+
   if (Changed)
     return PreservedAnalyses::none();
 
@@ -4590,7 +4603,12 @@
                  MaxFixpointIterations, OREGetter, DEBUG_TYPE);
 
     OpenMPOpt OMPOpt(SCC, CGUpdater, OREGetter, InfoCache, A);
-    return OMPOpt.run(false);
+    bool Result = OMPOpt.run(false);
+
+    if (PrintModuleAfterOptimizations)
+      LLVM_DEBUG(dbgs() << TAG << "Module after OpenMPOpt CGSCC Pass:\n" << M);
+
+    return Result;
   }
 
   bool doFinalization(CallGraph &CG) override { return CGUpdater.finalize(); }


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