| ; Here we have a case where there are two loops and LICM is hoisting an |
| ; instruction from one loop into the other loop! This is obviously bad and |
| ; happens because preheader insertion doesn't insert a preheader for this |
| ; case... bad. |
| |
| ; RUN: opt < %s -licm -loop-deletion -simplifycfg -S | \ |
| ; RUN: not grep "br " |
| |
| define i32 @main(i32 %argc) { |
| ; <label>:0 |
| br label %bb5 |
| bb5: ; preds = %bb5, %0 |
| %I = phi i32 [ 0, %0 ], [ %I2, %bb5 ] ; <i32> [#uses=1] |
| %I2 = add i32 %I, 1 ; <i32> [#uses=2] |
| %c = icmp eq i32 %I2, 10 ; <i1> [#uses=1] |
| br i1 %c, label %bb5, label %bb8 |
| bb8: ; preds = %bb8, %bb5 |
| %cann-indvar = phi i32 [ 0, %bb8 ], [ 0, %bb5 ] ; <i32> [#uses=0] |
| %X = add i32 %argc, %argc ; <i32> [#uses=1] |
| br i1 false, label %bb8, label %bb10 |
| bb10: ; preds = %bb8 |
| ret i32 %X |
| } |
| |
