[DAGCombiner] Add missing flag to addressing mode check

The checks in `canFoldInAddressingMode` tested for addressing modes that have a
base register but didn't set the `HasBaseReg` flag to true (it's false by
default). This patch fixes that. Although the omission of the flag was
technically incorrect it had no known observable impact, so no tests were
changed by this patch.

Differential Revision:  https://reviews.llvm.org/D60314

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358502 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 9dc33aa39796c26a43fc18e3b1557e0e0425309e..b03c65ccf2cb796d3a461b8b17c5f88420880029 100644 (file)
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -12897,6 +12897,7 @@ static bool canFoldInAddressingMode(SDNode *N, SDNode *Use,
 
   TargetLowering::AddrMode AM;
   if (N->getOpcode() == ISD::ADD) {
+    AM.HasBaseReg = true;
     ConstantSDNode *Offset = dyn_cast<ConstantSDNode>(N->getOperand(1));
     if (Offset)
       // [reg +/- imm]
@@ -12905,6 +12906,7 @@ static bool canFoldInAddressingMode(SDNode *N, SDNode *Use,
       // [reg +/- reg]
       AM.Scale = 1;
   } else if (N->getOpcode() == ISD::SUB) {
+    AM.HasBaseReg = true;
     ConstantSDNode *Offset = dyn_cast<ConstantSDNode>(N->getOperand(1));
     if (Offset)
       // [reg +/- imm]