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      1 ; RUN: llc < %s -march=x86 | grep "(%esp)" | count 2
      2 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"
      3 target triple = "i386-apple-darwin9.5"
      4 ; a - a should be found and removed, leaving refs to only L and P
      5 define i32 @test(i32 %a, i32 %L, i32 %P) nounwind {
      6 entry:
      7         %0 = sub i32 %a, %L
      8         %1 = add i32 %P, %0
      9 	%2 = sub i32 %1, %a
     10 	br label %return
     11 
     12 return:		; preds = %bb3
     13 	ret i32 %2
     14 }
     15