1*9880d681SAndroid Build Coastguard Worker; RUN: opt -irce -S < %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Workerdefine void @decrementing_loop(i32 *%arr, i32 *%a_len_ptr, i32 %n) { 4*9880d681SAndroid Build Coastguard Worker entry: 5*9880d681SAndroid Build Coastguard Worker %len = load i32, i32* %a_len_ptr, !range !0 6*9880d681SAndroid Build Coastguard Worker %first.itr.check = icmp sgt i32 %n, 0 7*9880d681SAndroid Build Coastguard Worker %start = sub i32 %n, 1 8*9880d681SAndroid Build Coastguard Worker br i1 %first.itr.check, label %loop, label %exit 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard Worker loop: 11*9880d681SAndroid Build Coastguard Worker %idx = phi i32 [ %start, %entry ] , [ %idx.dec, %in.bounds ] 12*9880d681SAndroid Build Coastguard Worker %idx.dec = sub i32 %idx, 1 13*9880d681SAndroid Build Coastguard Worker %abc.high = icmp slt i32 %idx, %len 14*9880d681SAndroid Build Coastguard Worker %abc.low = icmp sge i32 %idx, 0 15*9880d681SAndroid Build Coastguard Worker %abc = and i1 %abc.low, %abc.high 16*9880d681SAndroid Build Coastguard Worker br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 17*9880d681SAndroid Build Coastguard Worker 18*9880d681SAndroid Build Coastguard Worker in.bounds: 19*9880d681SAndroid Build Coastguard Worker %addr = getelementptr i32, i32* %arr, i32 %idx 20*9880d681SAndroid Build Coastguard Worker store i32 0, i32* %addr 21*9880d681SAndroid Build Coastguard Worker %next = icmp sgt i32 %idx.dec, -1 22*9880d681SAndroid Build Coastguard Worker br i1 %next, label %loop, label %exit 23*9880d681SAndroid Build Coastguard Worker 24*9880d681SAndroid Build Coastguard Worker out.of.bounds: 25*9880d681SAndroid Build Coastguard Worker ret void 26*9880d681SAndroid Build Coastguard Worker 27*9880d681SAndroid Build Coastguard Worker exit: 28*9880d681SAndroid Build Coastguard Worker ret void 29*9880d681SAndroid Build Coastguard Worker 30*9880d681SAndroid Build Coastguard Worker; CHECK: loop.preheader: 31*9880d681SAndroid Build Coastguard Worker; CHECK: [[not_len:[^ ]+]] = sub i32 -1, %len 32*9880d681SAndroid Build Coastguard Worker; CHECK: [[not_n:[^ ]+]] = sub i32 -1, %n 33*9880d681SAndroid Build Coastguard Worker; CHECK: [[not_len_hiclamp_cmp:[^ ]+]] = icmp sgt i32 [[not_len]], [[not_n]] 34*9880d681SAndroid Build Coastguard Worker; CHECK: [[not_len_hiclamp:[^ ]+]] = select i1 [[not_len_hiclamp_cmp]], i32 [[not_len]], i32 [[not_n]] 35*9880d681SAndroid Build Coastguard Worker; CHECK: [[len_hiclamp:[^ ]+]] = sub i32 -1, [[not_len_hiclamp]] 36*9880d681SAndroid Build Coastguard Worker; CHECK: [[not_exit_preloop_at_cmp:[^ ]+]] = icmp sgt i32 [[len_hiclamp]], 0 37*9880d681SAndroid Build Coastguard Worker; CHECK: [[not_exit_preloop_at:[^ ]+]] = select i1 [[not_exit_preloop_at_cmp]], i32 [[len_hiclamp]], i32 0 38*9880d681SAndroid Build Coastguard Worker; CHECK: %exit.preloop.at = add i32 [[not_exit_preloop_at]], -1 39*9880d681SAndroid Build Coastguard Worker} 40*9880d681SAndroid Build Coastguard Worker 41*9880d681SAndroid Build Coastguard Worker!0 = !{i32 0, i32 2147483647} 42*9880d681SAndroid Build Coastguard Worker!1 = !{!"branch_weights", i32 64, i32 4} 43