Fix PR11985

    
- BlockAddress has no support of BA + offset form and there is no way to
  propagate that offset into machine operand;
- Add BA + offset support and a new interface 'getTargetBlockAddress' to
  simplify target block address forming;
- All targets are modified to use new interface and X86 backend is enhanced to
  support BA + offset addressing.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163743 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 1 deletions

diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index 1ccfe54d21..988951907a 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -437,7 +437,13 @@ public:
   SDValue getRegisterMask(const uint32_t *RegMask);
   SDValue getEHLabel(DebugLoc dl, SDValue Root, MCSymbol *Label);
   SDValue getBlockAddress(const BlockAddress *BA, EVT VT,
-                          bool isTarget = false, unsigned char TargetFlags = 0);
+                          int64_t Offset = 0, bool isTarget = false,
+                          unsigned char TargetFlags = 0);
+  SDValue getTargetBlockAddress(const BlockAddress *BA, EVT VT,
+                                int64_t Offset = 0,
+                                unsigned char TargetFlags = 0) {
+    return getBlockAddress(BA, VT, Offset, true, TargetFlags);
+  }
 
   SDValue getCopyToReg(SDValue Chain, DebugLoc dl, unsigned Reg, SDValue N) {
     return getNode(ISD::CopyToReg, dl, MVT::Other, Chain,