1; RUN: opt -S -irce < %s | FileCheck %s 2 3define void @f_0(i32 *%arr, i32 *%a_len_ptr, i32 %n, i1* %cond_buf) { 4; CHECK-LABEL: @f_0( 5 6; CHECK-LABEL: loop.preheader: 7; CHECK: [[not_n:[^ ]+]] = sub i32 -1, %n 8; CHECK: [[not_safe_range_end:[^ ]+]] = sub i32 3, %len 9; CHECK: [[not_exit_main_loop_at_hiclamp_cmp:[^ ]+]] = icmp sgt i32 [[not_n]], [[not_safe_range_end]] 10; CHECK: [[not_exit_main_loop_at_hiclamp:[^ ]+]] = select i1 [[not_exit_main_loop_at_hiclamp_cmp]], i32 [[not_n]], i32 [[not_safe_range_end]] 11; CHECK: [[exit_main_loop_at_hiclamp:[^ ]+]] = sub i32 -1, [[not_exit_main_loop_at_hiclamp]] 12; CHECK: [[exit_main_loop_at_loclamp_cmp:[^ ]+]] = icmp sgt i32 [[exit_main_loop_at_hiclamp]], 0 13; CHECK: [[exit_main_loop_at_loclamp:[^ ]+]] = select i1 [[exit_main_loop_at_loclamp_cmp]], i32 [[exit_main_loop_at_hiclamp]], i32 0 14; CHECK: [[enter_main_loop:[^ ]+]] = icmp slt i32 0, [[exit_main_loop_at_loclamp]] 15; CHECK: br i1 [[enter_main_loop]], label %loop, label %main.pseudo.exit 16 17 entry: 18 %len = load i32, i32* %a_len_ptr, !range !0 19 %first.itr.check = icmp sgt i32 %n, 0 20 br i1 %first.itr.check, label %loop, label %exit 21 22 loop: 23 %idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ] 24 %idx.next = add i32 %idx, 1 25 %idx.for.abc = add i32 %idx, 4 26 %abc.actual = icmp slt i32 %idx.for.abc, %len 27 %cond = load volatile i1, i1* %cond_buf 28 %abc = and i1 %cond, %abc.actual 29 br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 30 31; CHECK: loop: 32; CHECK: %cond = load volatile i1, i1* %cond_buf 33; CHECK: %abc = and i1 %cond, true 34; CHECK: br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 35 36 in.bounds: 37 %addr = getelementptr i32, i32* %arr, i32 %idx.for.abc 38 store i32 0, i32* %addr 39 %next = icmp slt i32 %idx.next, %n 40 br i1 %next, label %loop, label %exit 41 42 out.of.bounds: 43 ret void 44 45 exit: 46 ret void 47} 48 49define void @f_1( 50 i32* %arr_a, i32* %a_len_ptr, i32* %arr_b, i32* %b_len_ptr, i32 %n) { 51; CHECK-LABEL: @f_1( 52 53; CHECK-LABEL: loop.preheader: 54; CHECK: [[not_len_b:[^ ]+]] = sub i32 -1, %len.b 55; CHECK: [[not_len_a:[^ ]+]] = sub i32 -1, %len.a 56; CHECK: [[smax_not_len_cond:[^ ]+]] = icmp sgt i32 [[not_len_b]], [[not_len_a]] 57; CHECK: [[smax_not_len:[^ ]+]] = select i1 [[smax_not_len_cond]], i32 [[not_len_b]], i32 [[not_len_a]] 58; CHECK: [[not_n:[^ ]+]] = sub i32 -1, %n 59; CHECK: [[not_upper_limit_cond_loclamp:[^ ]+]] = icmp sgt i32 [[smax_not_len]], [[not_n]] 60; CHECK: [[not_upper_limit_loclamp:[^ ]+]] = select i1 [[not_upper_limit_cond_loclamp]], i32 [[smax_not_len]], i32 [[not_n]] 61; CHECK: [[upper_limit_loclamp:[^ ]+]] = sub i32 -1, [[not_upper_limit_loclamp]] 62; CHECK: [[upper_limit_cmp:[^ ]+]] = icmp sgt i32 [[upper_limit_loclamp]], 0 63; CHECK: [[upper_limit:[^ ]+]] = select i1 [[upper_limit_cmp]], i32 [[upper_limit_loclamp]], i32 0 64 65 entry: 66 %len.a = load i32, i32* %a_len_ptr, !range !0 67 %len.b = load i32, i32* %b_len_ptr, !range !0 68 %first.itr.check = icmp sgt i32 %n, 0 69 br i1 %first.itr.check, label %loop, label %exit 70 71 loop: 72 %idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ] 73 %idx.next = add i32 %idx, 1 74 %abc.a = icmp slt i32 %idx, %len.a 75 %abc.b = icmp slt i32 %idx, %len.b 76 %abc = and i1 %abc.a, %abc.b 77 br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 78 79; CHECK: loop: 80; CHECK: %abc = and i1 true, true 81; CHECK: br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 82 83 in.bounds: 84 %addr.a = getelementptr i32, i32* %arr_a, i32 %idx 85 store i32 0, i32* %addr.a 86 %addr.b = getelementptr i32, i32* %arr_b, i32 %idx 87 store i32 -1, i32* %addr.b 88 %next = icmp slt i32 %idx.next, %n 89 br i1 %next, label %loop, label %exit 90 91 out.of.bounds: 92 ret void 93 94 exit: 95 ret void 96} 97 98!0 = !{i32 0, i32 2147483647} 99!1 = !{!"branch_weights", i32 64, i32 4} 100