Clearify the meaning of immutable StackObject.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45828 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/MachineFrameInfo.h b/include/llvm/CodeGen/MachineFrameInfo.h
index 9b1cacd66e52334f3c984269a3a815800644f2e9..0aad183891448a5f02b7539883b4d39ebb62f8aa 100644 (file)
--- a/include/llvm/CodeGen/MachineFrameInfo.h
+++ b/include/llvm/CodeGen/MachineFrameInfo.h
@@ -86,9 +86,9 @@ class MachineFrameInfo {
     // the function.  This field has no meaning for a variable sized element.
     int64_t SPOffset;
 
-    // isImmutable - If true, the value of the stack object does not change
-    // in this function. By default, fixed objects are immutable unless marked
-    // otherwise.
+    // isImmutable - If true, the value of the stack object is set before
+    // entering the function and is not modified inside the function. By
+    // default, fixed objects are immutable unless marked otherwise.
     bool isImmutable;
 
     StackObject(uint64_t Sz, unsigned Al, int64_t SP, bool IM = false)