Fix a crash in ValueTracking on vectors of pointers.

llvm-svn: 170240

2 files changed, 11 insertions, 1 deletions

diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index b86bc378fa8..64e132e2e2b 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -953,7 +953,7 @@ bool llvm::isKnownNonZero(Value *V, const DataLayout *TD, unsigned Depth) {
         return true;
   }
 
-  unsigned BitWidth = getBitWidth(V->getType(), TD);
+  unsigned BitWidth = getBitWidth(V->getType()->getScalarType(), TD);
 
   // X | Y != 0 if X != 0 or Y != 0.
   Value *X = 0, *Y = 0;
diff --git a/llvm/test/Transforms/InstCombine/2012-12-14-simp-vgep.ll b/llvm/test/Transforms/InstCombine/2012-12-14-simp-vgep.ll
new file mode 100644
index 00000000000..fc29b095e5c
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/2012-12-14-simp-vgep.ll
@@ -0,0 +1,10 @@
+; RUN: opt < %s -instcombine -S
+
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+
+define <4 x i32> @foo(<4 x i32*>* %in) {
+  %t17 = load <4 x i32*>* %in, align 8
+  %t18 = icmp eq <4 x i32*> %t17, zeroinitializer
+  %t19 = zext <4 x i1> %t18 to <4 x i32>
+  ret <4 x i32> %t19
+}