Add an unwind_to field to basic blocks, making them Users instead of Values.

This is the first checkin for PR1269, the new EH infrastructure.

llvm-svn: 47802

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index 61e0ab98989..c1cfa975a71 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -1216,6 +1216,15 @@ bool BitcodeReader::ParseFunctionBody(Function *F) {
       CurBB = FunctionBBs[0];
       continue;
       
+    case bitc::FUNC_CODE_INST_BB_UNWINDDEST:   // BB_UNWINDDEST: [bb#]
+      if (CurBB->getUnwindDest())
+        return Error("Only permit one BB_UNWINDDEST per BB");
+      if (Record.size() != 1)
+        return Error("Invalid BB_UNWINDDEST record");
+
+      CurBB->setUnwindDest(getBasicBlock(Record[0]));
+      continue;
+      
     case bitc::FUNC_CODE_INST_BINOP: {    // BINOP: [opval, ty, opval, opcode]
       unsigned OpNum = 0;
       Value *LHS, *RHS;