A hack to fix a problem folding immedaites. This fixes Olden/power.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23126 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
index 89f0f64..2503e26 100644
--- a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -685,16 +685,20 @@
unsigned v = (unsigned)cast<ConstantSDNode>(N)->getValue();
unsigned Hi = HA16(v);
unsigned Lo = Lo16(v);
+
+ // NOTE: This doesn't use SelectNodeTo, because doing that will prevent
+ // folding shared immediates into other the second instruction that
+ // uses it.
if (Hi && Lo) {
SDOperand Top = CurDAG->getTargetNode(PPC::LIS, MVT::i32,
getI32Imm(v >> 16));
- CurDAG->SelectNodeTo(N, PPC::ORI, MVT::i32, Top, getI32Imm(v & 0xFFFF));
+ return CurDAG->getTargetNode(PPC::ORI, MVT::i32, Top,
+ getI32Imm(v & 0xFFFF));
} else if (Lo) {
- CurDAG->SelectNodeTo(N, PPC::LI, MVT::i32, getI32Imm(v));
+ return CurDAG->getTargetNode(PPC::LI, MVT::i32, getI32Imm(v));
} else {
- CurDAG->SelectNodeTo(N, PPC::LIS, MVT::i32, getI32Imm(v >> 16));
+ return CurDAG->getTargetNode(PPC::LIS, MVT::i32, getI32Imm(v >> 16));
}
- break;
}
case ISD::UNDEF:
if (N->getValueType(0) == MVT::i32)