From c55fdcc9358d99bbc66bc6394a8490a7188fd74d Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Tue, 19 Aug 2008 20:43:22 +0000
Subject: Handle the case where target-specific fastisel code doesn't have a
 desired opcode.

llvm-svn: 55005
---
 llvm/lib/CodeGen/SelectionDAG/FastISel.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'llvm/lib/CodeGen/SelectionDAG/FastISel.cpp')

diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
index f4d453966b8..62fac06ceb8 100644
--- a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -33,6 +33,11 @@ FastISel::SelectInstructions(BasicBlock::iterator Begin, BasicBlock::iterator En
         return I;
       }
       unsigned ResultReg = FastEmit_rr(VT.getSimpleVT(), ISD::ADD, Op0, Op1);
+      if (ResultReg == 0) {
+        // Target-specific code wasn't able to find a machine opcode for
+        // the given ISD opcode and type. Halt "fast" selection and bail.
+        return I;
+      }
       ValueMap[I] = ResultReg;
       break;
     }
-- 
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