Initial target-independent CodeGen support for BlockAddresses.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85556 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 2 deletions

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index dfe24ae499..7243c33de1 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -322,6 +322,12 @@ void FunctionLoweringInfo::set(Function &fn, MachineFunction &mf,
     MBBMap[BB] = MBB;
     MF->push_back(MBB);
 
+    // Transfer the address-taken flag. This is necessary because there could
+    // be multiple MachineBasicBlocks corresponding to one BasicBlock, and only
+    // the first one should be marked.
+    if (BB->hasAddressTaken())
+      MBB->setHasAddressTaken();
+
     // Create Machine PHI nodes for LLVM PHI nodes, lowering them as
     // appropriate.
     PHINode *PN;
@@ -895,6 +901,9 @@ SDValue SelectionDAGLowering::getValue(const Value *V) {
       return DAG.getMergeValues(&Constants[0], NumElts, getCurDebugLoc());
     }
 
+    if (BlockAddress *BA = dyn_cast<BlockAddress>(C))
+      return DAG.getBlockAddress(BA, getCurDebugLoc());
+
     const VectorType *VecTy = cast<VectorType>(V->getType());
     unsigned NumElements = VecTy->getNumElements();
 
@@ -5741,8 +5750,7 @@ void SelectionDAGLowering::CopyValueToVirtualRegister(Value *V, unsigned Reg) {
 
 #include "llvm/CodeGen/SelectionDAGISel.h"
 
-void SelectionDAGISel::
-LowerArguments(BasicBlock *LLVMBB) {
+void SelectionDAGISel::LowerArguments(BasicBlock *LLVMBB) {
   // If this is the entry block, emit arguments.
   Function &F = *LLVMBB->getParent();
   SelectionDAG &DAG = SDL->DAG;