diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 72b3e36..b937eaf 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -10,6 +10,10 @@ // This pass combines dag nodes to form fewer, simpler DAG nodes. It can be run // both before and after the DAG is legalized. // +// This pass is not a substitute for the LLVM IR instcombine pass. This pass is +// primarily intended to handle simplification opportunities that are implicit +// in the LLVM IR and exposed by the various codegen lowering phases. +// //===----------------------------------------------------------------------===// #define DEBUG_TYPE "dagcombine" |