Make comment more explicit.

Re-reading the comment I updated in previous commit, it's better to make
it more explicit and avoid ambiguity more effectively.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197458 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/RegisterClassInfo.cpp b/lib/CodeGen/RegisterClassInfo.cpp
index b7424cb98f0ec627ac0631b852f415cbdcd8bc9d..aa844466496f87e1ccfdf3397c2fe1d01c1f555c 100644 (file)
--- a/lib/CodeGen/RegisterClassInfo.cpp
+++ b/lib/CodeGen/RegisterClassInfo.cpp
@@ -8,9 +8,9 @@
 //===----------------------------------------------------------------------===//
 //
 // This file implements the RegisterClassInfo class which provides dynamic
-// information about target register classes. Callee saved and preserved
-// registers depends on calling conventions and other dynamic information, so
-// some things cannot be determined statically.
+// information about target register classes. Callee-saved vs. caller-saved and
+// reserved registers depend on calling conventions and other dynamic
+// information, so some things cannot be determined statically.
 //
 //===----------------------------------------------------------------------===//