| ; LoopSimplify is breaking LICM on this testcase because the exit blocks from |
| ; the loop are reachable from more than just the exit nodes: the exit blocks |
| ; have predecessors from outside of the loop! |
| ; |
| ; This is distilled from a monsterous crafty example. |
| |
| ; RUN: opt < %s -licm -disable-output |
| |
| |
| @G = weak global i32 0 ; <i32*> [#uses=7] |
| |
| define i32 @main() { |
| entry: |
| store i32 123, i32* @G |
| br label %loopentry.i |
| loopentry.i: ; preds = %endif.1.i, %entry |
| %tmp.0.i = load i32, i32* @G ; <i32> [#uses=1] |
| %tmp.1.i = icmp eq i32 %tmp.0.i, 123 ; <i1> [#uses=1] |
| br i1 %tmp.1.i, label %Out.i, label %endif.0.i |
| endif.0.i: ; preds = %loopentry.i |
| %tmp.3.i = load i32, i32* @G ; <i32> [#uses=1] |
| %tmp.4.i = icmp eq i32 %tmp.3.i, 126 ; <i1> [#uses=1] |
| br i1 %tmp.4.i, label %ExitBlock.i, label %endif.1.i |
| endif.1.i: ; preds = %endif.0.i |
| %tmp.6.i = load i32, i32* @G ; <i32> [#uses=1] |
| %inc.i = add i32 %tmp.6.i, 1 ; <i32> [#uses=1] |
| store i32 %inc.i, i32* @G |
| br label %loopentry.i |
| Out.i: ; preds = %loopentry.i |
| store i32 0, i32* @G |
| br label %ExitBlock.i |
| ExitBlock.i: ; preds = %Out.i, %endif.0.i |
| %tmp.7.i = load i32, i32* @G ; <i32> [#uses=1] |
| ret i32 %tmp.7.i |
| } |
| |
