--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/Transforms/InstCombine/align-external.ll	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,29 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+; Don't assume that external global variables or those with weak linkage have
+; their preferred alignment. They may only have the ABI minimum alignment.
+
+; CHECK: %s = shl i64 %a, 3
+; CHECK: %r = or i64 %s, ptrtoint (i32* @A to i64)
+; CHECK: %q = add i64 %r, 1
+; CHECK: ret i64 %q
+
+target datalayout = "i32:8:32"
+
+@A = external global i32
+@B = weak_odr global i32 0
+
+define i64 @foo(i64 %a) {
+  %t = ptrtoint i32* @A to i64
+  %s = shl i64 %a, 3
+  %r = or i64 %t, %s
+  %q = add i64 %r, 1
+  ret i64 %q
+}
+
+define i32 @bar() {
+; CHECK-LABEL: @bar(
+  %r = load i32* @B, align 1
+; CHECK: align 1
+  ret i32 %r
+}