File: 2008-07-13-DivZero.ll

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llvm-toolchain-18 1%3A18.1.8-18
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; RUN: opt < %s -passes=instcombine -S | grep "lshr.*3"
; RUN: opt < %s -passes=instcombine -S | grep "call .*%cond"
; PR2506

; We can simplify the operand of udiv to '8', but not the operand to the
; call.  If the callee never returns, we can't assume the div is reachable.
define i32 @a(i32 %x, i32 %y) {
entry:
        %tobool = icmp ne i32 %y, 0             ; <i1> [#uses=1]
        %cond = select i1 %tobool, i32 8, i32 0         ; <i32> [#uses=2]
        %call = call i32 @b( i32 %cond )                ; <i32> [#uses=0]
        %div = udiv i32 %x, %cond               ; <i32> [#uses=1]
        ret i32 %div
}

declare i32 @b(i32)