Fix a bug in the soft-float handling of FCOPYSIGN that Duncan noticed
when working on legalizetypes. Both legalizetypes and legalizeops now
produce hte same code for CodeGen/ARM/fcopysign.ll.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53435 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 80502cf..4b4c02b 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -547,8 +547,11 @@
SignBit = DAG.getNode(ISD::SRL, SrcNVT, SignBit,
DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
SignBit = DAG.getNode(ISD::TRUNCATE, NVT, SignBit);
- } else if (SizeDiff < 0)
- SignBit = DAG.getNode(ISD::SIGN_EXTEND, NVT, SignBit);
+ } else if (SizeDiff < 0) {
+ SignBit = DAG.getNode(ISD::ZERO_EXTEND, NVT, SignBit);
+ SignBit = DAG.getNode(ISD::SHL, NVT, SignBit,
+ DAG.getConstant(-SizeDiff, TLI.getShiftAmountTy()));
+ }
// Clear the sign bit of first operand.
SDOperand Mask2 = (VT == MVT::f64)