From d24e7e1d9bce4121e6febe60ea7f4914dd331743 Mon Sep 17 00:00:00 2001
From: Chad Rosier <mcrosier@apple.com>
Date: Thu, 27 Oct 2011 00:21:16 +0000
Subject: A branch predicated on a constant can just FastEmit an unconditional
 branch.

llvm-svn: 143086
---
 llvm/lib/Target/ARM/ARMFastISel.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'llvm/lib/Target/ARM/ARMFastISel.cpp')

diff --git a/llvm/lib/Target/ARM/ARMFastISel.cpp b/llvm/lib/Target/ARM/ARMFastISel.cpp
index a67c8671458..6aff834b954 100644
--- a/llvm/lib/Target/ARM/ARMFastISel.cpp
+++ b/llvm/lib/Target/ARM/ARMFastISel.cpp
@@ -1151,6 +1151,12 @@ bool ARMFastISel::SelectBranch(const Instruction *I) {
       FuncInfo.MBB->addSuccessor(TBB);
       return true;
     }
+  } else if (const ConstantInt *CI =
+             dyn_cast<ConstantInt>(BI->getCondition())) {
+    uint64_t Imm = CI->getZExtValue();
+    MachineBasicBlock *Target = (Imm == 0) ? FBB : TBB;
+    FastEmitBranch(Target, DL);
+    return true;
   }
 
   unsigned CmpReg = getRegForValue(BI->getCondition());
-- 
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