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 9b1cacd..0aad183 100644
--- a/include/llvm/CodeGen/MachineFrameInfo.h
+++ b/include/llvm/CodeGen/MachineFrameInfo.h
@@ -86,9 +86,9 @@
// 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)