1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -analyze -scalar-evolution 2>&1 | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Worker; CHECK: Loop %bb: backedge-taken count is ((999 + (-1 * %x)) /u 3) 4*9880d681SAndroid Build Coastguard Worker; CHECK: Loop %bb: max backedge-taken count is 334 5*9880d681SAndroid Build Coastguard Worker 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker; This is a tricky testcase for unsigned wrap detection which ScalarEvolution 8*9880d681SAndroid Build Coastguard Worker; doesn't yet know how to do. 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard Workerdefine i32 @f(i32 %x) nounwind readnone { 11*9880d681SAndroid Build Coastguard Workerentry: 12*9880d681SAndroid Build Coastguard Worker %0 = icmp ugt i32 %x, 999 ; <i1> [#uses=1] 13*9880d681SAndroid Build Coastguard Worker br i1 %0, label %bb2, label %bb.nph 14*9880d681SAndroid Build Coastguard Worker 15*9880d681SAndroid Build Coastguard Workerbb.nph: ; preds = %entry 16*9880d681SAndroid Build Coastguard Worker br label %bb 17*9880d681SAndroid Build Coastguard Worker 18*9880d681SAndroid Build Coastguard Workerbb: ; preds = %bb.nph, %bb1 19*9880d681SAndroid Build Coastguard Worker %indvar = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb1 ] ; <i32> [#uses=2] 20*9880d681SAndroid Build Coastguard Worker %tmp = mul i32 %indvar, 3 ; <i32> [#uses=1] 21*9880d681SAndroid Build Coastguard Worker %x_addr.04 = add i32 %tmp, %x ; <i32> [#uses=1] 22*9880d681SAndroid Build Coastguard Worker %1 = add i32 %x_addr.04, 3 ; <i32> [#uses=2] 23*9880d681SAndroid Build Coastguard Worker br label %bb1 24*9880d681SAndroid Build Coastguard Worker 25*9880d681SAndroid Build Coastguard Workerbb1: ; preds = %bb 26*9880d681SAndroid Build Coastguard Worker %2 = icmp ugt i32 %1, 999 ; <i1> [#uses=1] 27*9880d681SAndroid Build Coastguard Worker %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1] 28*9880d681SAndroid Build Coastguard Worker br i1 %2, label %bb1.bb2_crit_edge, label %bb 29*9880d681SAndroid Build Coastguard Worker 30*9880d681SAndroid Build Coastguard Workerbb1.bb2_crit_edge: ; preds = %bb1 31*9880d681SAndroid Build Coastguard Worker %.lcssa = phi i32 [ %1, %bb1 ] ; <i32> [#uses=1] 32*9880d681SAndroid Build Coastguard Worker br label %bb2 33*9880d681SAndroid Build Coastguard Worker 34*9880d681SAndroid Build Coastguard Workerbb2: ; preds = %bb1.bb2_crit_edge, %entry 35*9880d681SAndroid Build Coastguard Worker %x_addr.0.lcssa = phi i32 [ %.lcssa, %bb1.bb2_crit_edge ], [ %x, %entry ] ; <i32> [#uses=1] 36*9880d681SAndroid Build Coastguard Worker ret i32 %x_addr.0.lcssa 37*9880d681SAndroid Build Coastguard Worker} 38