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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
; 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 ; <i32> [#uses=1]
%tmp.3.i = load i32* %x ; <i32> [#uses=1]
%tmp.4.i = icmp slt i32 %tmp.1.i, %tmp.3.i ; <i1> [#uses=1]
%retval.i = select i1 %tmp.4.i, i32* %y, i32* %x ; <i32*> [#uses=1]
%tmp.4 = load i32* %retval.i ; <i32> [#uses=1]
store i32 %tmp.4, i32* %x
ret void
}
define void @_Z5test2RiS_(i32* %x, i32* %y) {
entry:
%tmp.0 = alloca i32 ; <i32*> [#uses=2]
%tmp.2 = load i32* %x ; <i32> [#uses=2]
store i32 %tmp.2, i32* %tmp.0
%tmp.3.i = load i32* %y ; <i32> [#uses=1]
%tmp.4.i = icmp slt i32 %tmp.2, %tmp.3.i ; <i1> [#uses=1]
%retval.i = select i1 %tmp.4.i, i32* %y, i32* %tmp.0 ; <i32*> [#uses=1]
%tmp.6 = load i32* %retval.i ; <i32> [#uses=1]
store i32 %tmp.6, i32* %y
ret void
}
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