| ; RUN: llvm-as < %s | opt -indvars -instcombine | llvm-dis | grep 'store int 0' |
| ; Test that -indvars can reduce variable stride IVs. If it can reduce variable |
| ; stride iv's, it will make %iv. and %m.0.0 isomorphic to each other without |
| ; cycles, allowing the tmp.21 subtraction to be eliminated. |
| |
| void %vnum_test8(int* %data) { |
| entry: |
| %tmp.1 = getelementptr int* %data, int 3 ; <int*> [#uses=1] |
| %tmp.2 = load int* %tmp.1 ; <int> [#uses=2] |
| %tmp.4 = getelementptr int* %data, int 4 ; <int*> [#uses=1] |
| %tmp.5 = load int* %tmp.4 ; <int> [#uses=2] |
| %tmp.8 = getelementptr int* %data, int 2 ; <int*> [#uses=1] |
| %tmp.9 = load int* %tmp.8 ; <int> [#uses=3] |
| %tmp.125 = setgt int %tmp.2, 0 ; <bool> [#uses=1] |
| br bool %tmp.125, label %no_exit.preheader, label %return |
| |
| no_exit.preheader: ; preds = %entry |
| %tmp.16 = getelementptr int* %data, int %tmp.9 ; <int*> [#uses=1] |
| br label %no_exit |
| |
| no_exit: ; preds = %no_exit, %no_exit.preheader |
| %iv. = phi uint [ 0, %no_exit.preheader ], [ %iv..inc, %no_exit ] ; <uint> [#uses=1] |
| %iv. = phi int [ %tmp.5, %no_exit.preheader ], [ %iv..inc, %no_exit ] ; <int> [#uses=2] |
| %m.0.0 = phi int [ %tmp.5, %no_exit.preheader ], [ %tmp.24, %no_exit ] ; <int> [#uses=2] |
| store int 2, int* %tmp.16 |
| %tmp.21 = sub int %m.0.0, %iv. ; <int> [#uses=1] |
| store int %tmp.21, int* %data |
| %tmp.24 = add int %m.0.0, %tmp.9 ; <int> [#uses=1] |
| %iv..inc = add int %tmp.9, %iv. ; <int> [#uses=1] |
| %iv..inc = add uint %iv., 1 ; <uint> [#uses=2] |
| %iv..inc1 = cast uint %iv..inc to int ; <int> [#uses=1] |
| %tmp.12 = setlt int %iv..inc1, %tmp.2 ; <bool> [#uses=1] |
| br bool %tmp.12, label %no_exit, label %return.loopexit |
| |
| return.loopexit: ; preds = %no_exit |
| br label %return |
| |
| return: ; preds = %return.loopexit, %entry |
| ret void |
| } |
| |
