| Dan Gohman | 4658c9b | 2009-06-18 20:23:18 +0000 | [diff] [blame] | 1 | ; RUN: llvm-as < %s | llc -march=x86-64 | not grep cmov |
| Dan Gohman | 4658c9b | 2009-06-18 20:23:18 +0000 | [diff] [blame] | 2 | |
| 3 | ; LSR should be able to eliminate both smax and umax expressions |
| 4 | ; in loop trip counts. |
| 5 | |
| 6 | 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" |
| 7 | |
| 8 | define void @fs(double* nocapture %p, i64 %n) nounwind { |
| 9 | entry: |
| 10 | %tmp = icmp slt i64 %n, 1 ; <i1> [#uses=1] |
| 11 | %smax = select i1 %tmp, i64 1, i64 %n ; <i64> [#uses=1] |
| 12 | br label %bb |
| 13 | |
| 14 | bb: ; preds = %bb, %entry |
| 15 | %i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2] |
| 16 | %scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1] |
| 17 | store double 0.000000e+00, double* %scevgep, align 8 |
| 18 | %0 = add i64 %i.0, 1 ; <i64> [#uses=2] |
| 19 | %exitcond = icmp eq i64 %0, %smax ; <i1> [#uses=1] |
| 20 | br i1 %exitcond, label %return, label %bb |
| 21 | |
| 22 | return: ; preds = %bb |
| 23 | ret void |
| 24 | } |
| 25 | |
| 26 | define void @bs(double* nocapture %p, i64 %n) nounwind { |
| 27 | entry: |
| 28 | %tmp = icmp sge i64 %n, 1 ; <i1> [#uses=1] |
| 29 | %smax = select i1 %tmp, i64 %n, i64 1 ; <i64> [#uses=1] |
| 30 | br label %bb |
| 31 | |
| 32 | bb: ; preds = %bb, %entry |
| 33 | %i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2] |
| 34 | %scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1] |
| 35 | store double 0.000000e+00, double* %scevgep, align 8 |
| 36 | %0 = add i64 %i.0, 1 ; <i64> [#uses=2] |
| 37 | %exitcond = icmp eq i64 %0, %smax ; <i1> [#uses=1] |
| 38 | br i1 %exitcond, label %return, label %bb |
| 39 | |
| 40 | return: ; preds = %bb |
| 41 | ret void |
| 42 | } |
| 43 | |
| 44 | define void @fu(double* nocapture %p, i64 %n) nounwind { |
| 45 | entry: |
| 46 | %tmp = icmp eq i64 %n, 0 ; <i1> [#uses=1] |
| 47 | %umax = select i1 %tmp, i64 1, i64 %n ; <i64> [#uses=1] |
| 48 | br label %bb |
| 49 | |
| 50 | bb: ; preds = %bb, %entry |
| 51 | %i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2] |
| 52 | %scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1] |
| 53 | store double 0.000000e+00, double* %scevgep, align 8 |
| 54 | %0 = add i64 %i.0, 1 ; <i64> [#uses=2] |
| 55 | %exitcond = icmp eq i64 %0, %umax ; <i1> [#uses=1] |
| 56 | br i1 %exitcond, label %return, label %bb |
| 57 | |
| 58 | return: ; preds = %bb |
| 59 | ret void |
| 60 | } |
| 61 | |
| 62 | define void @bu(double* nocapture %p, i64 %n) nounwind { |
| 63 | entry: |
| 64 | %tmp = icmp ne i64 %n, 0 ; <i1> [#uses=1] |
| 65 | %umax = select i1 %tmp, i64 %n, i64 1 ; <i64> [#uses=1] |
| 66 | br label %bb |
| 67 | |
| 68 | bb: ; preds = %bb, %entry |
| 69 | %i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2] |
| 70 | %scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1] |
| 71 | store double 0.000000e+00, double* %scevgep, align 8 |
| 72 | %0 = add i64 %i.0, 1 ; <i64> [#uses=2] |
| 73 | %exitcond = icmp eq i64 %0, %umax ; <i1> [#uses=1] |
| 74 | br i1 %exitcond, label %return, label %bb |
| 75 | |
| 76 | return: ; preds = %bb |
| 77 | ret void |
| 78 | } |