ConstantFolding: Fix a crash when encoutering a truncating inttoptr.

This was introduced in r173293.

llvm-svn: 174424

1 files changed, 19 insertions, 0 deletions

diff --git a/llvm/test/Transforms/InstSimplify/ptr_diff.ll b/llvm/test/Transforms/InstSimplify/ptr_diff.ll
index 86516280696..8b4aa796013 100644
--- a/llvm/test/Transforms/InstSimplify/ptr_diff.ll
+++ b/llvm/test/Transforms/InstSimplify/ptr_diff.ll
@@ -57,3 +57,22 @@ define <4 x i32> @ptrdiff4(<4 x i8*> %arg) nounwind {
   %sub = sub <4 x i32> %p1, %p2
   ret <4 x i32> %sub
 }
+
+%struct.ham = type { i32, [2 x [2 x i32]] }
+
+@global = internal global %struct.ham zeroinitializer, align 4
+
+define i32 @ptrdiff5() nounwind {
+bb:
+  %tmp = getelementptr inbounds %struct.ham* @global, i32 0, i32 1
+  %tmp1 = getelementptr inbounds [2 x [2 x i32]]* %tmp, i32 0, i32 0
+  %tmp2 = bitcast [2 x i32]* %tmp1 to i32*
+  %tmp3 = ptrtoint i32* %tmp2 to i32
+  %tmp4 = getelementptr inbounds %struct.ham* @global, i32 0, i32 1
+  %tmp5 = getelementptr inbounds [2 x [2 x i32]]* %tmp4, i32 0, i32 0
+  %tmp6 = ptrtoint [2 x i32]* %tmp5 to i32
+  %tmp7 = sub i32 %tmp3, %tmp6
+  ret i32 %tmp7
+; CHECK: @ptrdiff5
+; CHECK: ret i32 0
+}