Auto merge of #68406 - andjo403:selfprofileLlvm, r=wesleywiser

[self-profiler] add selfprofiling to llvm

using pass name as event id and add additional data with name of module, function …

![image](https://user-images.githubusercontent.com/844398/72761970-205d8600-3bde-11ea-86de-87386e127944.png)

r? @michaelwoerister or @wesleywiser

1 files changed, 64 insertions, 1 deletions

diff --git a/src/rustllvm/PassWrapper.cpp b/src/rustllvm/PassWrapper.cpp
index 15e2251d763..2c283149be8 100644
--- a/src/rustllvm/PassWrapper.cpp
+++ b/src/rustllvm/PassWrapper.cpp
@@ -640,6 +640,62 @@ LLVMRustWriteOutputFile(LLVMTargetMachineRef Target, LLVMPassManagerRef PMR,
   return LLVMRustResult::Success;
 }
 
+extern "C" typedef void (*LLVMRustSelfProfileBeforePassCallback)(void*, // LlvmSelfProfiler
+                                                      const char*,      // pass name
+                                                      const char*);     // IR name
+extern "C" typedef void (*LLVMRustSelfProfileAfterPassCallback)(void*); // LlvmSelfProfiler
+
+#if LLVM_VERSION_GE(9, 0)
+
+std::string LLVMRustwrappedIrGetName(const llvm::Any &WrappedIr) {
+  if (any_isa<const Module *>(WrappedIr))
+    return any_cast<const Module *>(WrappedIr)->getName().str();
+  if (any_isa<const Function *>(WrappedIr))
+    return any_cast<const Function *>(WrappedIr)->getName().str();
+  if (any_isa<const Loop *>(WrappedIr))
+    return any_cast<const Loop *>(WrappedIr)->getName().str();
+  if (any_isa<const LazyCallGraph::SCC *>(WrappedIr))
+    return any_cast<const LazyCallGraph::SCC *>(WrappedIr)->getName();
+  return "<UNKNOWN>";
+}
+
+
+void LLVMSelfProfileInitializeCallbacks(
+    PassInstrumentationCallbacks& PIC, void* LlvmSelfProfiler,
+    LLVMRustSelfProfileBeforePassCallback BeforePassCallback,
+    LLVMRustSelfProfileAfterPassCallback AfterPassCallback) {
+  PIC.registerBeforePassCallback([LlvmSelfProfiler, BeforePassCallback](
+                                     StringRef Pass, llvm::Any Ir) {
+    std::string PassName = Pass.str();
+    std::string IrName = LLVMRustwrappedIrGetName(Ir);
+    BeforePassCallback(LlvmSelfProfiler, PassName.c_str(), IrName.c_str());
+    return true;
+  });
+
+  PIC.registerAfterPassCallback(
+      [LlvmSelfProfiler, AfterPassCallback](StringRef Pass, llvm::Any Ir) {
+        AfterPassCallback(LlvmSelfProfiler);
+      });
+
+  PIC.registerAfterPassInvalidatedCallback(
+      [LlvmSelfProfiler, AfterPassCallback](StringRef Pass) {
+        AfterPassCallback(LlvmSelfProfiler);
+      });
+
+  PIC.registerBeforeAnalysisCallback([LlvmSelfProfiler, BeforePassCallback](
+                                         StringRef Pass, llvm::Any Ir) {
+    std::string PassName = Pass.str();
+    std::string IrName = LLVMRustwrappedIrGetName(Ir);
+    BeforePassCallback(LlvmSelfProfiler, PassName.c_str(), IrName.c_str());
+  });
+
+  PIC.registerAfterAnalysisCallback(
+      [LlvmSelfProfiler, AfterPassCallback](StringRef Pass, llvm::Any Ir) {
+        AfterPassCallback(LlvmSelfProfiler);
+      });
+}
+#endif
+
 enum class LLVMRustOptStage {
   PreLinkNoLTO,
   PreLinkThinLTO,
@@ -666,7 +722,10 @@ LLVMRustOptimizeWithNewPassManager(
     bool MergeFunctions, bool UnrollLoops, bool SLPVectorize, bool LoopVectorize,
     bool DisableSimplifyLibCalls,
     LLVMRustSanitizerOptions *SanitizerOptions,
-    const char *PGOGenPath, const char *PGOUsePath) {
+    const char *PGOGenPath, const char *PGOUsePath,
+    void* LlvmSelfProfiler,
+    LLVMRustSelfProfileBeforePassCallback BeforePassCallback,
+    LLVMRustSelfProfileAfterPassCallback AfterPassCallback) {
 #if LLVM_VERSION_GE(9, 0)
   Module *TheModule = unwrap(ModuleRef);
   TargetMachine *TM = unwrap(TMRef);
@@ -685,6 +744,10 @@ LLVMRustOptimizeWithNewPassManager(
   StandardInstrumentations SI;
   SI.registerCallbacks(PIC);
 
+  if (LlvmSelfProfiler){
+    LLVMSelfProfileInitializeCallbacks(PIC,LlvmSelfProfiler,BeforePassCallback,AfterPassCallback);
+  }
+
   Optional<PGOOptions> PGOOpt;
   if (PGOGenPath) {
     assert(!PGOUsePath);