From ca460d5a39e09836e279405b85e2390fa7e7d859 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Sun, 7 Sep 2008 11:34:47 +0000 Subject: [PATCH] Convert // fold (sub c1, c2) -> c1-c2 from a no-op into an actual transformation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55886 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 2d400bdfb25..4e4984789bc 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -1111,7 +1111,7 @@ SDValue DAGCombiner::visitSUB(SDNode *N) { return DAG.getConstant(0, N->getValueType(0)); // fold (sub c1, c2) -> c1-c2 if (N0C && N1C) - return DAG.getNode(ISD::SUB, VT, N0, N1); + return DAG.getConstant(N0C->getAPIntValue() - N1C->getAPIntValue(), VT); // fold (sub x, c) -> (add x, -c) if (N1C) return DAG.getNode(ISD::ADD, VT, N0,