Handle blocks with 2 unconditional branches in AnalyzeBranch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37571 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/Target/Alpha/AlphaInstrInfo.cpp b/lib/Target/Alpha/AlphaInstrInfo.cpp
index 15f5f841bc..718587dd29 100644
--- a/lib/Target/Alpha/AlphaInstrInfo.cpp
+++ b/lib/Target/Alpha/AlphaInstrInfo.cpp
@@ -200,6 +200,16 @@ bool AlphaInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TB
     return false;
   }
   
+  // If the block ends with two Alpha::BRs, handle it.  The second one is not
+  // executed, so remove it.
+  if (SecondLastInst->getOpcode() == Alpha::BR && 
+      LastInst->getOpcode() == Alpha::BR) {
+    TBB = SecondLastInst->getOperand(0).getMachineBasicBlock();
+    I = LastInst;
+    I->eraseFromParent();
+    return false;
+  }
+
   // Otherwise, can't handle this.
   return true;
 }