| ; 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: llvm-as < %s | opt -licm -disable-output |
| |
| %G = weak global int 0 ; <int*> [#uses=13] |
| |
| implementation ; Functions: |
| |
| int %main() { |
| entry: |
| store int 123, int* %G |
| br label %loopentry.i |
| |
| loopentry.i: ; preds = %entry, %endif.1.i |
| %tmp.0.i = load int* %G ; <int> [#uses=1] |
| %tmp.1.i = seteq int %tmp.0.i, 123 ; <bool> [#uses=1] |
| br bool %tmp.1.i, label %Out.i, label %endif.0.i |
| |
| endif.0.i: ; preds = %loopentry.i |
| %tmp.3.i = load int* %G ; <int> [#uses=1] |
| %tmp.4.i = seteq int %tmp.3.i, 126 ; <bool> [#uses=1] |
| br bool %tmp.4.i, label %ExitBlock.i, label %endif.1.i |
| |
| endif.1.i: ; preds = %endif.0.i |
| %tmp.6.i = load int* %G ; <int> [#uses=1] |
| %inc.i = add int %tmp.6.i, 1 ; <int> [#uses=1] |
| store int %inc.i, int* %G |
| br label %loopentry.i |
| |
| Out.i: ; preds = %loopentry.i |
| store int 0, int* %G |
| br label %ExitBlock.i |
| |
| ExitBlock.i: ; preds = %endif.0.i, %Out.i |
| %tmp.7.i = load int* %G ; <int> [#uses=1] |
| ret int %tmp.7.i |
| } |
| |
