| Dan Gohman | 45b3b54 | 2009-05-08 21:03:19 +0000 | [diff] [blame^] | 1 | ; RUN: llvm-as < %s | opt -analyze -scalar-evolution -disable-output \ |
| 2 | ; RUN: | grep {sext.*trunc.*Exits: 11} |
| 3 | |
| 4 | ; ScalarEvolution should be able to compute a loop exit value for %indvar.i8. |
| 5 | |
| 6 | define void @another_count_down_signed(double* %d, i64 %n) nounwind { |
| 7 | entry: |
| 8 | br label %loop |
| 9 | |
| 10 | loop: ; preds = %loop, %entry |
| 11 | %indvar = phi i64 [ %n, %entry ], [ %indvar.next, %loop ] ; <i64> [#uses=4] |
| 12 | %s0 = shl i64 %indvar, 8 ; <i64> [#uses=1] |
| 13 | %indvar.i8 = ashr i64 %s0, 8 ; <i64> [#uses=1] |
| 14 | %t0 = getelementptr double* %d, i64 %indvar.i8 ; <double*> [#uses=2] |
| 15 | %t1 = load double* %t0 ; <double> [#uses=1] |
| 16 | %t2 = mul double %t1, 1.000000e-01 ; <double> [#uses=1] |
| 17 | store double %t2, double* %t0 |
| 18 | %indvar.next = sub i64 %indvar, 1 ; <i64> [#uses=2] |
| 19 | %exitcond = icmp eq i64 %indvar.next, 10 ; <i1> [#uses=1] |
| 20 | br i1 %exitcond, label %return, label %loop |
| 21 | |
| 22 | return: ; preds = %loop |
| 23 | ret void |
| 24 | } |