Attach maximum function count to Module when using PGO mode.

This sets the maximum entry count among all functions in the program to the module using module flags. This allows the optimizer to use this information.

Differential Revision: http://reviews.llvm.org/D15163

llvm-svn: 255918

1 files changed, 5 insertions, 2 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 3b3fc87..173b0dc 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -375,8 +375,11 @@ void CodeGenModule::Release() {
     if (llvm::Function *CudaDtorFunction = CUDARuntime->makeModuleDtorFunction())
       AddGlobalDtor(CudaDtorFunction);
   }
-  if (PGOReader && PGOStats.hasDiagnostics())
-    PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName);
+  if (PGOReader) {
+    getModule().setMaximumFunctionCount(PGOReader->getMaximumFunctionCount());
+    if (PGOStats.hasDiagnostics())
+      PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName);
+  }
   EmitCtorList(GlobalCtors, "llvm.global_ctors");
   EmitCtorList(GlobalDtors, "llvm.global_dtors");
   EmitGlobalAnnotations();