Add alignment value to allowsUnalignedMemoryAccess

Rename to allowsMisalignedMemoryAccess.

On R600, 8 and 16 byte accesses are mostly OK with 4-byte alignment,
and don't need to be split into multiple accesses. Vector loads with
an alignment of the element type are not uncommon in OpenCL code.

llvm-svn: 214055
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index d63fac1..537b80f 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -9214,9 +9214,10 @@
   return isInt<16>(Imm) || isUInt<16>(Imm);
 }
 
-bool PPCTargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
-                                                      unsigned,
-                                                      bool *Fast) const {
+bool PPCTargetLowering::allowsMisalignedMemoryAccesses(EVT VT,
+                                                       unsigned,
+                                                       unsigned,
+                                                       bool *Fast) const {
   if (DisablePPCUnaligned)
     return false;