Give these files top-level comments that describe the current code.

[oota-llvm.git] / include / llvm / Analysis / ConstantFolding.h

diff --git a/include/llvm/Analysis/ConstantFolding.h b/include/llvm/Analysis/ConstantFolding.h
index 3e393ff6917cc4f84ce02954effc23cff01844b8..263d42a7ec754b7f5513fad34ce5c71ccbf202a6 100644 (file)
--- a/include/llvm/Analysis/ConstantFolding.h
+++ b/include/llvm/Analysis/ConstantFolding.h
@@ -1,4 +1,4 @@
-//===-- ConstantFolding.h - Analyze constant folding possibilities --------===//
+//===-- ConstantFolding.h - Fold instructions into constants --------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,8 +7,12 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This family of functions determines the possibility of performing constant
-// folding.
+// This file declares routines for folding instructions into constants.
+//
+// Also, to supplement the basic VMCore ConstantExpr simplifications,
+// this file declares some additional folding routines that can make use of
+// TargetData information. These functions cannot go in VMCore due to library
+// dependency issues.
 //
 //===----------------------------------------------------------------------===//