1 ; RUN: opt -irce -S < %s | FileCheck %s
3 define void @single_access_with_preloop(i32 *%arr, i32 *%a_len_ptr, i32 %n, i32 %offset) {
5 %len = load i32, i32* %a_len_ptr, !range !0
6 %first.itr.check = icmp sgt i32 %n, 0
7 br i1 %first.itr.check, label %loop, label %exit
10 %idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ]
11 %idx.next = add i32 %idx, 1
12 %array.idx = add i32 %idx, %offset
13 %abc.high = icmp slt i32 %array.idx, %len
14 %abc.low = icmp sge i32 %array.idx, 0
15 %abc = and i1 %abc.low, %abc.high
16 br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1
19 %addr = getelementptr i32, i32* %arr, i32 %array.idx
20 store i32 0, i32* %addr
21 %next = icmp slt i32 %idx.next, %n
22 br i1 %next, label %loop, label %exit
31 ; CHECK-LABEL: loop.preheader:
32 ; CHECK: [[not_safe_start:[^ ]+]] = add i32 %offset, -1
33 ; CHECK: [[not_n:[^ ]+]] = sub i32 -1, %n
34 ; CHECK: [[not_exit_preloop_at_cond_loclamp:[^ ]+]] = icmp sgt i32 [[not_safe_start]], [[not_n]]
35 ; CHECK: [[not_exit_preloop_at_loclamp:[^ ]+]] = select i1 [[not_exit_preloop_at_cond_loclamp]], i32 [[not_safe_start]], i32 [[not_n]]
36 ; CHECK: [[exit_preloop_at_loclamp:[^ ]+]] = sub i32 -1, [[not_exit_preloop_at_loclamp]]
37 ; CHECK: [[exit_preloop_at_cond:[^ ]+]] = icmp sgt i32 [[exit_preloop_at_loclamp]], 0
38 ; CHECK: [[exit_preloop_at:[^ ]+]] = select i1 [[exit_preloop_at_cond]], i32 [[exit_preloop_at_loclamp]], i32 0
41 ; CHECK: [[not_safe_start_2:[^ ]+]] = add i32 %offset, -1
42 ; CHECK: [[not_safe_end:[^ ]+]] = sub i32 [[not_safe_start_2]], %len
43 ; CHECK: [[not_exit_mainloop_at_cond_loclamp:[^ ]+]] = icmp sgt i32 [[not_safe_end]], [[not_n]]
44 ; CHECK: [[not_exit_mainloop_at_loclamp:[^ ]+]] = select i1 [[not_exit_mainloop_at_cond_loclamp]], i32 [[not_safe_end]], i32 [[not_n]]
45 ; CHECK: [[exit_mainloop_at_loclamp:[^ ]+]] = sub i32 -1, [[not_exit_mainloop_at_loclamp]]
46 ; CHECK: [[exit_mainloop_at_cmp:[^ ]+]] = icmp sgt i32 [[exit_mainloop_at_loclamp]], 0
47 ; CHECK: [[exit_mainloop_at:[^ ]+]] = select i1 [[exit_mainloop_at_cmp]], i32 [[exit_mainloop_at_loclamp]], i32 0
50 ; CHECK-LABEL: in.bounds:
51 ; CHECK: [[continue_mainloop_cond:[^ ]+]] = icmp slt i32 %idx.next, [[exit_mainloop_at]]
52 ; CHECK: br i1 [[continue_mainloop_cond]], label %loop, label %main.exit.selector
54 ; CHECK-LABEL: main.exit.selector:
55 ; CHECK: [[mainloop_its_left:[^ ]+]] = icmp slt i32 %idx.next, %n
56 ; CHECK: br i1 [[mainloop_its_left]], label %main.pseudo.exit, label %exit.loopexit
58 ; CHECK-LABEL: in.bounds.preloop:
59 ; CHECK: [[continue_preloop_cond:[^ ]+]] = icmp slt i32 %idx.next.preloop, [[exit_preloop_at]]
60 ; CHECK: br i1 [[continue_preloop_cond]], label %loop.preloop, label %preloop.exit.selector
62 ; CHECK-LABEL: preloop.exit.selector:
63 ; CHECK: [[preloop_its_left:[^ ]+]] = icmp slt i32 %idx.next.preloop, %n
64 ; CHECK: br i1 [[preloop_its_left]], label %preloop.pseudo.exit, label %exit.loopexit
66 ; CHECK-LABEL: in.bounds.postloop:
67 ; CHECK: %next.postloop = icmp slt i32 %idx.next.postloop, %n
68 ; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit
70 !0 = !{i32 0, i32 2147483647}
71 !1 = !{!"branch_weights", i32 64, i32 4}