[llvm-mca] Update DispatchStage header comment. NFC.

Updated the comment to be a wee bit more descriptive.

llvm-svn: 333296

2 files changed, 10 insertions, 3 deletions

diff --git a/llvm/tools/llvm-mca/DispatchStage.cpp b/llvm/tools/llvm-mca/DispatchStage.cpp
index baffb169073..3e292575d8e 100644
--- a/llvm/tools/llvm-mca/DispatchStage.cpp
+++ b/llvm/tools/llvm-mca/DispatchStage.cpp
@@ -8,7 +8,11 @@
 //===----------------------------------------------------------------------===//
 /// \file
 ///
-/// This file implements methods declared by the DispatchStage class.
+/// This file models the dispatch component of an instruction pipeline.
+///
+/// The DispatchStage is responsible for updating instruction dependencies
+/// and communicating to the simulated instruction scheduler that an instruction
+/// is ready to be scheduled for execution.
 ///
 //===----------------------------------------------------------------------===//
 
diff --git a/llvm/tools/llvm-mca/DispatchStage.h b/llvm/tools/llvm-mca/DispatchStage.h
index c2fbc53051c..574d28f8044 100644
--- a/llvm/tools/llvm-mca/DispatchStage.h
+++ b/llvm/tools/llvm-mca/DispatchStage.h
@@ -8,8 +8,11 @@
 //===----------------------------------------------------------------------===//
 /// \file
 ///
-/// This file implements classes that are used to model reorder buffers and
-/// the hardware dispatch logic.
+/// This file models the dispatch component of an instruction pipeline.
+///
+/// The DispatchStage is responsible for updating instruction dependencies
+/// and communicating to the simulated instruction scheduler that an instruction
+/// is ready to be scheduled for execution.
 ///
 //===----------------------------------------------------------------------===//