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      1 ; RUN: llc %s -o - -aarch64-atomic-cfg-tidy=0 | FileCheck %s
      2 ; Check that ANDS (tst) is not merged with ADD when the immediate
      3 ; is not 0.
      4 ; <rdar://problem/16693089>
      5 target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
      6 target triple = "arm64-apple-ios"
      7 
      8 ; CHECK-LABEL: tst1:
      9 ; CHECK: add [[REG:w[0-9]+]], w{{[0-9]+}}, #1
     10 ; CHECK: tst [[REG]], #0x1
     11 define void @tst1(i1 %tst, i32 %true) {
     12 entry:
     13   br i1 %tst, label %for.end, label %for.body
     14 
     15 for.body:                                         ; preds = %for.body, %entry
     16   %result.09 = phi i32 [ %add2.result.0, %for.body ], [ 1, %entry ]
     17   %i.08 = phi i32 [ %inc, %for.body ], [ 2, %entry ]
     18   %and = and i32 %i.08, 1
     19   %cmp1 = icmp eq i32 %and, 0
     20   %add2.result.0 = select i1 %cmp1, i32 %true, i32 %result.09
     21   %inc = add nsw i32 %i.08, 1
     22   %cmp = icmp slt i32 %i.08, %true
     23   br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
     24 
     25 for.cond.for.end_crit_edge:                       ; preds = %for.body
     26   %add2.result.0.lcssa = phi i32 [ %add2.result.0, %for.body ]
     27   br label %for.end
     28 
     29 for.end:                                          ; preds = %for.cond.for.end_crit_edge, %entry
     30   ret void
     31 }
     32