commit ca5e47d3f84dcf3dfbc6706bf1041e7029f3ce0a
author Bob Wilson <bob.wilson@apple.com> Mon Aug 16 23:37:17 2010 +0000
committer Bob Wilson <bob.wilson@apple.com> Mon Aug 16 23:37:17 2010 +0000
tree d416bc84464e6b5f7b29f4a8d8e12c12d1071e63
parent fecdea0bf77599038eb368db3bc6a38a14900308

Ignore undef shuffle indices when checking for a VTRN shuffle.  Radar 8290937.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111208 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMISelLowering.cpp

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 5a03a07..b05c5dd 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -3229,6 +3229,7 @@
   unsigned NumElts = VT.getVectorNumElements();
   WhichResult = (M[0] == 0 ? 0 : 1);
   for (unsigned i = 0; i < NumElts; i += 2) {
+    if (M[i] < 0) continue;
     if ((unsigned) M[i] != i + WhichResult ||
         (unsigned) M[i+1] != i + WhichResult)
       return false;