Clarify comment.
llvm-svn: 181959
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 3e04ae7d..0986ae7 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -192,10 +192,12 @@
bool OnlySimpleReturnStmts = NumSimpleReturnExprs > 0
&& NumSimpleReturnExprs == NumReturnExprs;
// If the function contains only a simple return statement, the
- // cleanup code may become the first breakpoint in the function. To
- // be safe, set the debug location for it to the location of the
- // return statement. Otherwise point it to end of the function's
- // lexical scope.
+ // location before the cleanup code becomes the last useful
+ // breakpoint in the function, because the simple return expression
+ // will be evaluated after the cleanup code. To be safe, set the
+ // debug location for cleanup code to the location of the return
+ // statement. Otherwise the cleanup code should be at the end of the
+ // function's lexical scope.
if (CGDebugInfo *DI = getDebugInfo()) {
if (OnlySimpleReturnStmts)
DI->EmitLocation(Builder, LastStopPoint);