1 ; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | \
2 ; RUN: grep select | not grep {i32\\*}
5 ; This testcase corresponds to PR362, which notices that this horrible code
6 ; is generated by the C++ front-end and LLVM optimizers, which has lots of
7 ; loads and other stuff that are unneeded.
9 ; Instcombine should propagate the load through the select instructions to
10 ; allow elimination of the extra stuff by the mem2reg pass.
12 implementation ; Functions:
14 void %_Z5test1RiS_(int* %x, int* %y) {
16 %tmp.1.i = load int* %y ; <int> [#uses=1]
17 %tmp.3.i = load int* %x ; <int> [#uses=1]
18 %tmp.4.i = setlt int %tmp.1.i, %tmp.3.i ; <bool> [#uses=1]
19 %retval.i = select bool %tmp.4.i, int* %y, int* %x ; <int*> [#uses=1]
20 %tmp.4 = load int* %retval.i ; <int> [#uses=1]
21 store int %tmp.4, int* %x
25 void %_Z5test2RiS_(int* %x, int* %y) {
27 %tmp.0 = alloca int ; <int*> [#uses=2]
28 %tmp.2 = load int* %x ; <int> [#uses=2]
29 store int %tmp.2, int* %tmp.0
30 %tmp.3.i = load int* %y ; <int> [#uses=1]
31 %tmp.4.i = setlt int %tmp.2, %tmp.3.i ; <bool> [#uses=1]
32 %retval.i = select bool %tmp.4.i, int* %y, int* %tmp.0 ; <int*> [#uses=1]
33 %tmp.6 = load int* %retval.i ; <int> [#uses=1]
34 store int %tmp.6, int* %y