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      1 ; RUN: opt < %s -instcombine -S | grep "align 16" | count 1
      2 target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
      3 
      4 ; A multi-dimensional array in a nested loop doing vector stores that
      5 ; aren't yet aligned. Instcombine can understand the addressing in the
      6 ; Nice case to prove 16 byte alignment. In the Awkward case, the inner
      7 ; array dimension is not even, so the stores to it won't always be
      8 ; aligned. Instcombine should prove alignment in exactly one of the two
      9 ; stores.
     10 
     11 @Nice    = global [1001 x [20000 x double]] zeroinitializer, align 32
     12 @Awkward = global [1001 x [20001 x double]] zeroinitializer, align 32
     13 
     14 define void @foo() nounwind  {
     15 entry:
     16   br label %bb7.outer
     17 
     18 bb7.outer:
     19   %i = phi i64 [ 0, %entry ], [ %indvar.next26, %bb11 ]
     20   br label %bb1
     21 
     22 bb1:
     23   %j = phi i64 [ 0, %bb7.outer ], [ %indvar.next, %bb1 ]
     24 
     25   %t4 = getelementptr [1001 x [20000 x double]], [1001 x [20000 x double]]* @Nice, i64 0, i64 %i, i64 %j
     26   %q = bitcast double* %t4 to <2 x double>*
     27   store <2 x double><double 0.0, double 0.0>, <2 x double>* %q, align 8
     28 
     29   %s4 = getelementptr [1001 x [20001 x double]], [1001 x [20001 x double]]* @Awkward, i64 0, i64 %i, i64 %j
     30   %r = bitcast double* %s4 to <2 x double>*
     31   store <2 x double><double 0.0, double 0.0>, <2 x double>* %r, align 8
     32 
     33   %indvar.next = add i64 %j, 2
     34   %exitcond = icmp eq i64 %indvar.next, 556
     35   br i1 %exitcond, label %bb11, label %bb1
     36 
     37 bb11:
     38   %indvar.next26 = add i64 %i, 1
     39   %exitcond27 = icmp eq i64 %indvar.next26, 991
     40   br i1 %exitcond27, label %return.split, label %bb7.outer
     41 
     42 return.split:
     43   ret void
     44 }
     45