; RUN: opt < %s -instcombine -S | \ ; RUN: grep select | not grep 'i32\*' ; 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. define void @_Z5test1RiS_(i32* %x, i32* %y) { entry: %tmp.1.i = load i32* %y ; [#uses=1] %tmp.3.i = load i32* %x ; [#uses=1] %tmp.4.i = icmp slt i32 %tmp.1.i, %tmp.3.i ; [#uses=1] %retval.i = select i1 %tmp.4.i, i32* %y, i32* %x ; [#uses=1] %tmp.4 = load i32* %retval.i ; [#uses=1] store i32 %tmp.4, i32* %x ret void } define void @_Z5test2RiS_(i32* %x, i32* %y) { entry: %tmp.0 = alloca i32 ; [#uses=2] %tmp.2 = load i32* %x ; [#uses=2] store i32 %tmp.2, i32* %tmp.0 %tmp.3.i = load i32* %y ; [#uses=1] %tmp.4.i = icmp slt i32 %tmp.2, %tmp.3.i ; [#uses=1] %retval.i = select i1 %tmp.4.i, i32* %y, i32* %tmp.0 ; [#uses=1] %tmp.6 = load i32* %retval.i ; [#uses=1] store i32 %tmp.6, i32* %y ret void }