| ; RUN: opt < %s -loop-reduce -S | grep "phi double" | count 1 |
| |
| define void @foobar(i32 %n) nounwind { |
| entry: |
| icmp eq i32 %n, 0 ; <i1>:0 [#uses=2] |
| br i1 %0, label %return, label %bb.nph |
| |
| bb.nph: ; preds = %entry |
| %umax = select i1 %0, i32 1, i32 %n ; <i32> [#uses=1] |
| br label %bb |
| |
| bb: ; preds = %bb, %bb.nph |
| %i.03 = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; <i32> [#uses=3] |
| tail call void @bar( i32 %i.03 ) nounwind |
| uitofp i32 %i.03 to double ; <double>:1 [#uses=1] |
| tail call void @foo( double %1 ) nounwind |
| %indvar.next = add i32 %i.03, 1 ; <i32> [#uses=2] |
| %exitcond = icmp eq i32 %indvar.next, %umax ; <i1> [#uses=1] |
| br i1 %exitcond, label %return, label %bb |
| |
| return: ; preds = %bb, %entry |
| ret void |
| } |
| |
| ; Unable to eliminate cast because the mantissa bits for double are not enough |
| ; to hold all of i64 IV bits. |
| define void @foobar2(i64 %n) nounwind { |
| entry: |
| icmp eq i64 %n, 0 ; <i1>:0 [#uses=2] |
| br i1 %0, label %return, label %bb.nph |
| |
| bb.nph: ; preds = %entry |
| %umax = select i1 %0, i64 1, i64 %n ; <i64> [#uses=1] |
| br label %bb |
| |
| bb: ; preds = %bb, %bb.nph |
| %i.03 = phi i64 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; <i64> [#uses=3] |
| trunc i64 %i.03 to i32 ; <i32>:1 [#uses=1] |
| tail call void @bar( i32 %1 ) nounwind |
| uitofp i64 %i.03 to double ; <double>:2 [#uses=1] |
| tail call void @foo( double %2 ) nounwind |
| %indvar.next = add i64 %i.03, 1 ; <i64> [#uses=2] |
| %exitcond = icmp eq i64 %indvar.next, %umax ; <i1> [#uses=1] |
| br i1 %exitcond, label %return, label %bb |
| |
| return: ; preds = %bb, %entry |
| ret void |
| } |
| |
| ; Unable to eliminate cast due to potentional overflow. |
| define void @foobar3() nounwind { |
| entry: |
| tail call i32 (...)* @nn( ) nounwind ; <i32>:0 [#uses=1] |
| icmp eq i32 %0, 0 ; <i1>:1 [#uses=1] |
| br i1 %1, label %return, label %bb |
| |
| bb: ; preds = %bb, %entry |
| %i.03 = phi i32 [ 0, %entry ], [ %3, %bb ] ; <i32> [#uses=3] |
| tail call void @bar( i32 %i.03 ) nounwind |
| uitofp i32 %i.03 to double ; <double>:2 [#uses=1] |
| tail call void @foo( double %2 ) nounwind |
| add i32 %i.03, 1 ; <i32>:3 [#uses=2] |
| tail call i32 (...)* @nn( ) nounwind ; <i32>:4 [#uses=1] |
| icmp ugt i32 %4, %3 ; <i1>:5 [#uses=1] |
| br i1 %5, label %bb, label %return |
| |
| return: ; preds = %bb, %entry |
| ret void |
| } |
| |
| ; Unable to eliminate cast due to overflow. |
| define void @foobar4() nounwind { |
| entry: |
| br label %bb.nph |
| |
| bb.nph: ; preds = %entry |
| br label %bb |
| |
| bb: ; preds = %bb, %bb.nph |
| %i.03 = phi i8 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; <i32> [#uses=3] |
| %tmp2 = sext i8 %i.03 to i32 ; <i32>:0 [#uses=1] |
| tail call void @bar( i32 %tmp2 ) nounwind |
| %tmp3 = uitofp i8 %i.03 to double ; <double>:1 [#uses=1] |
| tail call void @foo( double %tmp3 ) nounwind |
| %indvar.next = add i8 %i.03, 1 ; <i32> [#uses=2] |
| %tmp = sext i8 %indvar.next to i32 |
| %exitcond = icmp eq i32 %tmp, 32767 ; <i1> [#uses=1] |
| br i1 %exitcond, label %return, label %bb |
| |
| return: ; preds = %bb, %entry |
| ret void |
| } |
| |
| declare void @bar(i32) |
| |
| declare void @foo(double) |
| |
| declare i32 @nn(...) |
| |
