eliminate a use of Instruction::getPrev(), patch by Gabor Greif in 2005.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36197 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/VMCore/Verifier.cpp b/lib/VMCore/Verifier.cpp
index d09f157b7b1230713de6d25060936efd9b464200..98f26495ce04c4c73c73e3836e104e3f1faabadc 100644 (file)
--- a/lib/VMCore/Verifier.cpp
+++ b/lib/VMCore/Verifier.cpp
@@ -640,7 +640,8 @@ void Verifier::visitPHINode(PHINode &PN) {
   // This can be tested by checking whether the instruction before this is
   // either nonexistent (because this is begin()) or is a PHI node.  If not,
   // then there is some other instruction before a PHI.
-  Assert2(&PN.getParent()->front() == &PN || isa<PHINode>(PN.getPrev()),
+  Assert2(&PN == &PN.getParent()->front() || 
+          isa<PHINode>(--BasicBlock::iterator(&PN)),
           "PHI nodes not grouped at top of basic block!",
           &PN, PN.getParent());