| Dan Gohman | 3c7d308 | 2009-09-11 18:01:28 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -indvars -S | grep add | count 1 |
| Dan Gohman | 2d4f5b1 | 2009-07-16 17:34:36 +0000 | [diff] [blame] | 2 | |
| 3 | ; Indvars should be able to compute the exit value of this loop |
| 4 | ; without any additional arithmetic. The only add needed should |
| 5 | ; be the canonical IV increment. |
| 6 | |
| 7 | target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" |
| 8 | |
| 9 | define void @foo(double* %p, i32 %n) nounwind { |
| 10 | entry: |
| 11 | %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1] |
| 12 | br i1 %0, label %bb.nph, label %return |
| 13 | |
| 14 | bb.nph: ; preds = %entry |
| 15 | br label %bb2 |
| 16 | |
| 17 | bb2: ; preds = %bb3, %bb.nph |
| 18 | %i.01 = phi i32 [ %7, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=3] |
| 19 | %1 = sext i32 %i.01 to i64 ; <i64> [#uses=1] |
| 20 | %2 = getelementptr double* %p, i64 %1 ; <double*> [#uses=1] |
| 21 | %3 = load double* %2, align 8 ; <double> [#uses=1] |
| 22 | %4 = fmul double %3, 1.100000e+00 ; <double> [#uses=1] |
| 23 | %5 = sext i32 %i.01 to i64 ; <i64> [#uses=1] |
| 24 | %6 = getelementptr double* %p, i64 %5 ; <double*> [#uses=1] |
| 25 | store double %4, double* %6, align 8 |
| 26 | %7 = add i32 %i.01, 1 ; <i32> [#uses=2] |
| 27 | br label %bb3 |
| 28 | |
| 29 | bb3: ; preds = %bb2 |
| 30 | %8 = icmp slt i32 %7, %n ; <i1> [#uses=1] |
| 31 | br i1 %8, label %bb2, label %bb3.return_crit_edge |
| 32 | |
| 33 | bb3.return_crit_edge: ; preds = %bb3 |
| 34 | br label %return |
| 35 | |
| 36 | return: ; preds = %bb3.return_crit_edge, %entry |
| 37 | ret void |
| 38 | } |