[mips] When double precision loads and stores are split into two i32 loads and

stores, make sure the load or store that accesses the higher half does not have
an alignment that is larger than the offset from the original address.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190318 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/MipsSEISelLowering.cpp b/lib/Target/Mips/MipsSEISelLowering.cpp
index f32e146368c3f3c87aaf3f06b6f906e6a8e527d9..2436e540f143aa7dc194cfbc7821065837be34de 100644 (file)
--- a/lib/Target/Mips/MipsSEISelLowering.cpp
+++ b/lib/Target/Mips/MipsSEISelLowering.cpp
@@ -645,7 +645,7 @@ SDValue MipsSETargetLowering::lowerLOAD(SDValue Op, SelectionDAG &DAG) const {
   SDValue Hi = DAG.getLoad(MVT::i32, DL, Lo.getValue(1), Ptr,
                            MachinePointerInfo(), Nd.isVolatile(),
                            Nd.isNonTemporal(), Nd.isInvariant(),
-                           Nd.getAlignment());
+                           std::min(Nd.getAlignment(), 4U));
 
   if (!Subtarget->isLittle())
     std::swap(Lo, Hi);
@@ -681,8 +681,8 @@ SDValue MipsSETargetLowering::lowerSTORE(SDValue Op, SelectionDAG &DAG) const {
   // i32 store to higher address.
   Ptr = DAG.getNode(ISD::ADD, DL, PtrVT, Ptr, DAG.getConstant(4, PtrVT));
   return DAG.getStore(Chain, DL, Hi, Ptr, MachinePointerInfo(),
-                      Nd.isVolatile(), Nd.isNonTemporal(), Nd.getAlignment(),
-                      Nd.getTBAAInfo());
+                      Nd.isVolatile(), Nd.isNonTemporal(),
+                      std::min(Nd.getAlignment(), 4U), Nd.getTBAAInfo());
 }
 
 SDValue MipsSETargetLowering::lowerMulDiv(SDValue Op, unsigned NewOpc,