1; RUN: opt -irce -S < %s | FileCheck %s
2
3define void @multiple_access_no_preloop(
4    i32* %arr_a, i32* %a_len_ptr, i32* %arr_b, i32* %b_len_ptr, i32 %n) {
5
6 entry:
7  %len.a = load i32, i32* %a_len_ptr, !range !0
8  %len.b = load i32, i32* %b_len_ptr, !range !0
9  %first.itr.check = icmp sgt i32 %n, 0
10  br i1 %first.itr.check, label %loop, label %exit
11
12 loop:
13  %idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds.b ]
14  %idx.next = add i32 %idx, 1
15  %abc.a = icmp slt i32 %idx, %len.a
16  br i1 %abc.a, label %in.bounds.a, label %out.of.bounds, !prof !1
17
18 in.bounds.a:
19  %addr.a = getelementptr i32, i32* %arr_a, i32 %idx
20  store i32 0, i32* %addr.a
21  %abc.b = icmp slt i32 %idx, %len.b
22  br i1 %abc.b, label %in.bounds.b, label %out.of.bounds, !prof !1
23
24 in.bounds.b:
25  %addr.b = getelementptr i32, i32* %arr_b, i32 %idx
26  store i32 -1, i32* %addr.b
27  %next = icmp slt i32 %idx.next, %n
28  br i1 %next, label %loop, label %exit
29
30 out.of.bounds:
31  ret void
32
33 exit:
34  ret void
35}
36
37; CHECK-LABEL: multiple_access_no_preloop
38
39; CHECK-LABEL: loop.preheader:
40; CHECK: [[not_len_b:[^ ]+]] = sub i32 -1, %len.b
41; CHECK: [[not_len_a:[^ ]+]] = sub i32 -1, %len.a
42; CHECK: [[smax_not_len_cond:[^ ]+]] = icmp sgt i32 [[not_len_b]], [[not_len_a]]
43; CHECK: [[smax_not_len:[^ ]+]] = select i1 [[smax_not_len_cond]], i32 [[not_len_b]], i32 [[not_len_a]]
44; CHECK: [[not_n:[^ ]+]] = sub i32 -1, %n
45; CHECK: [[not_upper_limit_cond_loclamp:[^ ]+]] = icmp sgt i32 [[smax_not_len]], [[not_n]]
46; CHECK: [[not_upper_limit_loclamp:[^ ]+]] = select i1 [[not_upper_limit_cond_loclamp]], i32 [[smax_not_len]], i32 [[not_n]]
47; CHECK: [[upper_limit_loclamp:[^ ]+]] = sub i32 -1, [[not_upper_limit_loclamp]]
48; CHECK: [[upper_limit_cmp:[^ ]+]] = icmp sgt i32 [[upper_limit_loclamp]], 0
49; CHECK: [[upper_limit:[^ ]+]] = select i1 [[upper_limit_cmp]], i32 [[upper_limit_loclamp]], i32 0
50
51; CHECK-LABEL: loop:
52; CHECK: br i1 true, label %in.bounds.a, label %out.of.bounds
53
54; CHECK-LABEL: in.bounds.a:
55; CHECK: br i1 true, label %in.bounds.b, label %out.of.bounds
56
57; CHECK-LABEL: in.bounds.b:
58; CHECK: [[main_loop_cond:[^ ]+]] = icmp slt i32 %idx.next, [[upper_limit]]
59; CHECK: br i1 [[main_loop_cond]], label %loop, label %main.exit.selector
60
61; CHECK-LABEL: in.bounds.b.postloop:
62; CHECK: %next.postloop = icmp slt i32 %idx.next.postloop, %n
63; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit
64
65!0 = !{i32 0, i32 2147483647}
66!1 = !{!"branch_weights", i32 64, i32 4}
67