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; PR23538
; RUN: opt < %s -indvars -loop-deletion -S | FileCheck %s
; Check IndVarSimplify should not replace exit value because or else
; udiv will be introduced by expand and the cost will be high.
;
; CHECK-LABEL: @_Z3fooPKcjj(
; CHECK-NOT: udiv
declare void @_Z3mixRjj(i32* dereferenceable(4), i32)
declare void @llvm.lifetime.start(i64, i8* nocapture)
declare void @llvm.lifetime.end(i64, i8* nocapture)
define i32 @_Z3fooPKcjj(i8* nocapture readonly %s, i32 %len, i32 %c) {
entry:
%a = alloca i32, align 4
%tmp = bitcast i32* %a to i8*
call void @llvm.lifetime.start(i64 4, i8* %tmp)
store i32 -1640531527, i32* %a, align 4
%cmp8 = icmp ugt i32 %len, 11
br i1 %cmp8, label %while.body.lr.ph, label %while.end
while.body.lr.ph: ; preds = %entry
br label %while.body
while.body: ; preds = %while.body, %while.body.lr.ph
%keylen.010 = phi i32 [ %len, %while.body.lr.ph ], [ %sub, %while.body ]
%s.addr.09 = phi i8* [ %s, %while.body.lr.ph ], [ %add.ptr, %while.body ]
%tmp1 = bitcast i8* %s.addr.09 to i32*
%tmp2 = load i32, i32* %tmp1, align 4
%shl.i = shl i32 %tmp2, 1
%and.i = and i32 %shl.i, 16843008
%tmp3 = load i32, i32* %a, align 4
%sub.i = add i32 %tmp3, %tmp2
%add = sub i32 %sub.i, %and.i
store i32 %add, i32* %a, align 4
%add.ptr = getelementptr inbounds i8, i8* %s.addr.09, i64 12
%sub = add i32 %keylen.010, -12
%cmp = icmp ugt i32 %sub, 11
br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge
while.cond.while.end_crit_edge: ; preds = %while.body
%sub.lcssa = phi i32 [ %sub, %while.body ]
br label %while.end
while.end: ; preds = %while.cond.while.end_crit_edge, %entry
%keylen.0.lcssa = phi i32 [ %sub.lcssa, %while.cond.while.end_crit_edge ], [ %len, %entry ]
call void @_Z3mixRjj(i32* dereferenceable(4) %a, i32 %keylen.0.lcssa)
%tmp4 = load i32, i32* %a, align 4
call void @llvm.lifetime.end(i64 4, i8* %tmp)
ret i32 %tmp4
}
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