commit 33cdfe9f1943418604be5c800800394ae809fc4c
author Nick Lewycky <nicholas@mxc.ca> Mon Mar 11 21:44:37 2013 +0000
committer Nick Lewycky <nicholas@mxc.ca> Mon Mar 11 21:44:37 2013 +0000
tree d9ece7ae1740bbdd3ed0f9bc424bf083192b1646
parent 12dccaed9c0368f4f5ef4312c32b375c725c9daf

Fix a crasher newly introduced in r176659/r176649, where fast-isel tries to
lower an expect intrinsic that is a constant expression.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176830 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/FastISel.cpp

diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index aa45ac5..10e2dc6 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -698,6 +698,8 @@
   }
   case Intrinsic::expect: {
     unsigned ResultReg = getRegForValue(Call->getArgOperand(0));
+    if (ResultReg == 0)
+      return false;
     UpdateValueMap(Call, ResultReg);
     return true;
   }