Implement mcount profiling, enabled via -pg.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125282 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index 66114c8..364f269 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -210,6 +210,15 @@
CallSite);
}
+void CodeGenFunction::EmitMCountInstrumentation() {
+ llvm::FunctionType *FTy =
+ llvm::FunctionType::get(llvm::Type::getVoidTy(getLLVMContext()), false);
+
+ llvm::Constant *MCountFn = CGM.CreateRuntimeFunction(FTy,
+ Target.getMCountName());
+ Builder.CreateCall(MCountFn);
+}
+
void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
llvm::Function *Fn,
const FunctionArgList &Args,
@@ -260,6 +269,9 @@
EmitFunctionInstrumentation("__cyg_profile_func_enter");
+ if (CGM.getCodeGenOpts().InstrumentForProfiling)
+ EmitMCountInstrumentation();
+
// FIXME: Leaked.
// CC info is ignored, hopefully?
CurFnInfo = &CGM.getTypes().getFunctionInfo(FnRetTy, Args,
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index 19fbf5c..1fe1c3f 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -1087,6 +1087,9 @@
/// function instrumentation is enabled.
void EmitFunctionInstrumentation(const char *Fn);
+ /// EmitMCountInstrumentation - Emit call to .mcount.
+ void EmitMCountInstrumentation();
+
/// EmitFunctionProlog - Emit the target specific LLVM code to load the
/// arguments for the given function. This is also responsible for naming the
/// LLVM function arguments.