[OPENMP] Require valid SourceLocation in function call, NFC.

Removed default empty SourceLocation argument from `emitCall` function
and require valid location.

llvm-svn: 325812
diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.cpp b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
index 1eae838..83cc45b 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntime.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
@@ -8057,9 +8057,10 @@
   CGF.EmitRuntimeCall(RTLFn, Args);
 }
 
-void CGOpenMPRuntime::emitCall(CodeGenFunction &CGF, llvm::Value *Callee,
-                               ArrayRef<llvm::Value *> Args,
-                               SourceLocation Loc) const {
+void CGOpenMPRuntime::emitCall(CodeGenFunction &CGF, SourceLocation Loc,
+                               llvm::Value *Callee,
+                               ArrayRef<llvm::Value *> Args) const {
+  assert(Loc.isValid() && "Outlined function call location must be valid.");
   auto DL = ApplyDebugLocation::CreateDefaultArtificial(CGF, Loc);
 
   if (auto *Fn = dyn_cast<llvm::Function>(Callee)) {
@@ -8074,8 +8075,7 @@
 void CGOpenMPRuntime::emitOutlinedFunctionCall(
     CodeGenFunction &CGF, SourceLocation Loc, llvm::Value *OutlinedFn,
     ArrayRef<llvm::Value *> Args) const {
-  assert(Loc.isValid() && "Outlined function call location must be valid.");
-  emitCall(CGF, OutlinedFn, Args, Loc);
+  emitCall(CGF, Loc, OutlinedFn, Args);
 }
 
 Address CGOpenMPRuntime::getParameterAddress(CodeGenFunction &CGF,
diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.h b/clang/lib/CodeGen/CGOpenMPRuntime.h
index e1ba833..046228e 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntime.h
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.h
@@ -251,9 +251,8 @@
   virtual StringRef getOutlinedHelperName() const { return ".omp_outlined."; }
 
   /// Emits \p Callee function call with arguments \p Args with location \p Loc.
-  void emitCall(CodeGenFunction &CGF, llvm::Value *Callee,
-                ArrayRef<llvm::Value *> Args = llvm::None,
-                SourceLocation Loc = SourceLocation()) const;
+  void emitCall(CodeGenFunction &CGF, SourceLocation Loc, llvm::Value *Callee,
+                ArrayRef<llvm::Value *> Args = llvm::None) const;
 
 private:
   /// \brief Default const ident_t object used for initialization of all other