; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | \ ; RUN: grep select | not grep {i32\\*} ; END. ; This testcase corresponds to PR362, which notices that this horrible code ; is generated by the C++ front-end and LLVM optimizers, which has lots of ; loads and other stuff that are unneeded. ; ; Instcombine should propagate the load through the select instructions to ; allow elimination of the extra stuff by the mem2reg pass. implementation ; Functions: void %_Z5test1RiS_(int* %x, int* %y) { entry: %tmp.1.i = load int* %y ; [#uses=1] %tmp.3.i = load int* %x ; [#uses=1] %tmp.4.i = setlt int %tmp.1.i, %tmp.3.i ; [#uses=1] %retval.i = select bool %tmp.4.i, int* %y, int* %x ; [#uses=1] %tmp.4 = load int* %retval.i ; [#uses=1] store int %tmp.4, int* %x ret void } void %_Z5test2RiS_(int* %x, int* %y) { entry: %tmp.0 = alloca int ; [#uses=2] %tmp.2 = load int* %x ; [#uses=2] store int %tmp.2, int* %tmp.0 %tmp.3.i = load int* %y ; [#uses=1] %tmp.4.i = setlt int %tmp.2, %tmp.3.i ; [#uses=1] %retval.i = select bool %tmp.4.i, int* %y, int* %tmp.0 ; [#uses=1] %tmp.6 = load int* %retval.i ; [#uses=1] store int %tmp.6, int* %y ret void }