Fix a bug in foldSelectICmpAndOr.

Differences in bitwidth between X and Y could exist even if C1 and C2 have
the same Log2 representation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180779 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/InstCombine/InstCombineSelect.cpp b/lib/Transforms/InstCombine/InstCombineSelect.cpp
index a34b73ace49c8ce589b4bd70800541a1fe2b3b01..2defe631ae7a734a7c7ed885f774809ee6a4f3e3 100644 (file)
--- a/lib/Transforms/InstCombine/InstCombineSelect.cpp
+++ b/lib/Transforms/InstCombine/InstCombineSelect.cpp
@@ -401,7 +401,8 @@ static Value *foldSelectICmpAndOr(const SelectInst &SI, Value *TrueVal,
   } else if (C1Log > C2Log) {
     V = Builder->CreateLShr(V, C1Log - C2Log);
     V = Builder->CreateZExtOrTrunc(V, Y->getType());
-  }
+  } else
+    V = Builder->CreateZExtOrTrunc(V, Y->getType());
 
   ICmpInst::Predicate Pred = IC->getPredicate();
   if ((Pred == ICmpInst::ICMP_NE && OrOnFalseVal) ||