Add comment for load folding
llvm-svn: 169880
diff --git a/llvm/lib/CodeGen/PeepholeOptimizer.cpp b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
index cc07d47..0900ba3 100644
--- a/llvm/lib/CodeGen/PeepholeOptimizer.cpp
+++ b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
@@ -49,6 +49,11 @@
// v1 = bitcast v0
// = v0
//
+// - Optimize Loads:
+//
+// Loads that can be folded into a later instruction. A load is foldable
+// if it loads to virtual registers and the virtual register defined has
+// a single use.
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "peephole-opt"