1; PR23538 2; RUN: opt < %s -indvars -loop-deletion -S | FileCheck %s 3 4; Check IndVarSimplify should not replace exit value because or else 5; udiv will be introduced by expand and the cost will be high. 6; 7; CHECK-LABEL: @_Z3fooPKcjj( 8; CHECK-NOT: udiv 9 10declare void @_Z3mixRjj(i32* dereferenceable(4), i32) 11declare void @llvm.lifetime.start(i64, i8* nocapture) 12declare void @llvm.lifetime.end(i64, i8* nocapture) 13 14define i32 @_Z3fooPKcjj(i8* nocapture readonly %s, i32 %len, i32 %c) { 15entry: 16 %a = alloca i32, align 4 17 %tmp = bitcast i32* %a to i8* 18 call void @llvm.lifetime.start(i64 4, i8* %tmp) 19 store i32 -1640531527, i32* %a, align 4 20 %cmp8 = icmp ugt i32 %len, 11 21 br i1 %cmp8, label %while.body.lr.ph, label %while.end 22 23while.body.lr.ph: ; preds = %entry 24 br label %while.body 25 26while.body: ; preds = %while.body, %while.body.lr.ph 27 %keylen.010 = phi i32 [ %len, %while.body.lr.ph ], [ %sub, %while.body ] 28 %s.addr.09 = phi i8* [ %s, %while.body.lr.ph ], [ %add.ptr, %while.body ] 29 %tmp1 = bitcast i8* %s.addr.09 to i32* 30 %tmp2 = load i32, i32* %tmp1, align 4 31 %shl.i = shl i32 %tmp2, 1 32 %and.i = and i32 %shl.i, 16843008 33 %tmp3 = load i32, i32* %a, align 4 34 %sub.i = add i32 %tmp3, %tmp2 35 %add = sub i32 %sub.i, %and.i 36 store i32 %add, i32* %a, align 4 37 %add.ptr = getelementptr inbounds i8, i8* %s.addr.09, i64 12 38 %sub = add i32 %keylen.010, -12 39 %cmp = icmp ugt i32 %sub, 11 40 br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge 41 42while.cond.while.end_crit_edge: ; preds = %while.body 43 %sub.lcssa = phi i32 [ %sub, %while.body ] 44 br label %while.end 45 46while.end: ; preds = %while.cond.while.end_crit_edge, %entry 47 %keylen.0.lcssa = phi i32 [ %sub.lcssa, %while.cond.while.end_crit_edge ], [ %len, %entry ] 48 call void @_Z3mixRjj(i32* dereferenceable(4) %a, i32 %keylen.0.lcssa) 49 %tmp4 = load i32, i32* %a, align 4 50 call void @llvm.lifetime.end(i64 4, i8* %tmp) 51 ret i32 %tmp4 52} 53