| Evan Cheng | 4e49c80 | 2008-08-17 19:25:28 +0000 | [diff] [blame] | 1 | ; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep "phi double" | count 1 |
| 2 | |
| 3 | define void @foobar(i32 %n) nounwind { |
| 4 | entry: |
| 5 | icmp eq i32 %n, 0 ; <i1>:0 [#uses=2] |
| 6 | br i1 %0, label %return, label %bb.nph |
| 7 | |
| 8 | bb.nph: ; preds = %entry |
| 9 | %umax = select i1 %0, i32 1, i32 %n ; <i32> [#uses=1] |
| 10 | br label %bb |
| 11 | |
| 12 | bb: ; preds = %bb, %bb.nph |
| 13 | %i.03 = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; <i32> [#uses=3] |
| 14 | tail call void @bar( i32 %i.03 ) nounwind |
| 15 | uitofp i32 %i.03 to double ; <double>:1 [#uses=1] |
| 16 | tail call void @foo( double %1 ) nounwind |
| 17 | %indvar.next = add i32 %i.03, 1 ; <i32> [#uses=2] |
| 18 | %exitcond = icmp eq i32 %indvar.next, %umax ; <i1> [#uses=1] |
| 19 | br i1 %exitcond, label %return, label %bb |
| 20 | |
| 21 | return: ; preds = %bb, %entry |
| 22 | ret void |
| 23 | } |
| 24 | |
| 25 | ; Unable to eliminate cast because the mantissa bits for double are not enough |
| 26 | ; to hold all of i64 IV bits. |
| 27 | define void @foobar2(i64 %n) nounwind { |
| 28 | entry: |
| 29 | icmp eq i64 %n, 0 ; <i1>:0 [#uses=2] |
| 30 | br i1 %0, label %return, label %bb.nph |
| 31 | |
| 32 | bb.nph: ; preds = %entry |
| 33 | %umax = select i1 %0, i64 1, i64 %n ; <i64> [#uses=1] |
| 34 | br label %bb |
| 35 | |
| 36 | bb: ; preds = %bb, %bb.nph |
| 37 | %i.03 = phi i64 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; <i64> [#uses=3] |
| 38 | trunc i64 %i.03 to i32 ; <i32>:1 [#uses=1] |
| 39 | tail call void @bar( i32 %1 ) nounwind |
| 40 | uitofp i64 %i.03 to double ; <double>:2 [#uses=1] |
| 41 | tail call void @foo( double %2 ) nounwind |
| 42 | %indvar.next = add i64 %i.03, 1 ; <i64> [#uses=2] |
| 43 | %exitcond = icmp eq i64 %indvar.next, %umax ; <i1> [#uses=1] |
| 44 | br i1 %exitcond, label %return, label %bb |
| 45 | |
| 46 | return: ; preds = %bb, %entry |
| 47 | ret void |
| 48 | } |
| 49 | |
| 50 | ; Unable to eliminate cast due to potentional overflow. |
| 51 | define void @foobar3() nounwind { |
| 52 | entry: |
| 53 | tail call i32 (...)* @nn( ) nounwind ; <i32>:0 [#uses=1] |
| 54 | icmp eq i32 %0, 0 ; <i1>:1 [#uses=1] |
| 55 | br i1 %1, label %return, label %bb |
| 56 | |
| 57 | bb: ; preds = %bb, %entry |
| 58 | %i.03 = phi i32 [ 0, %entry ], [ %3, %bb ] ; <i32> [#uses=3] |
| 59 | tail call void @bar( i32 %i.03 ) nounwind |
| 60 | uitofp i32 %i.03 to double ; <double>:2 [#uses=1] |
| 61 | tail call void @foo( double %2 ) nounwind |
| 62 | add i32 %i.03, 1 ; <i32>:3 [#uses=2] |
| 63 | tail call i32 (...)* @nn( ) nounwind ; <i32>:4 [#uses=1] |
| 64 | icmp ugt i32 %4, %3 ; <i1>:5 [#uses=1] |
| 65 | br i1 %5, label %bb, label %return |
| 66 | |
| 67 | return: ; preds = %bb, %entry |
| 68 | ret void |
| 69 | } |
| 70 | |
| 71 | ; Unable to eliminate cast due to overflow. |
| 72 | define void @foobar4() nounwind { |
| 73 | entry: |
| 74 | br label %bb.nph |
| 75 | |
| 76 | bb.nph: ; preds = %entry |
| 77 | br label %bb |
| 78 | |
| 79 | bb: ; preds = %bb, %bb.nph |
| 80 | %i.03 = phi i8 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; <i32> [#uses=3] |
| 81 | %tmp2 = sext i8 %i.03 to i32 ; <i32>:0 [#uses=1] |
| 82 | tail call void @bar( i32 %tmp2 ) nounwind |
| 83 | %tmp3 = uitofp i8 %i.03 to double ; <double>:1 [#uses=1] |
| 84 | tail call void @foo( double %tmp3 ) nounwind |
| 85 | %indvar.next = add i8 %i.03, 1 ; <i32> [#uses=2] |
| 86 | %tmp = sext i8 %indvar.next to i32 |
| 87 | %exitcond = icmp eq i32 %tmp, 32767 ; <i1> [#uses=1] |
| 88 | br i1 %exitcond, label %return, label %bb |
| 89 | |
| 90 | return: ; preds = %bb, %entry |
| 91 | ret void |
| 92 | } |
| 93 | |
| 94 | declare void @bar(i32) |
| 95 | |
| 96 | declare void @foo(double) |
| 97 | |
| 98 | declare i32 @nn(...) |
| 99 | |