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1; RUN: llc -march=hexagon -ifcvt-limit=0 < %s | FileCheck %s
2
3; Check if the branch probabilities are reflected in the instructions:
4; The basic block placement pass should place the more probable successor
5; block as the fall-through block. The unconditional jump in the predecessor
6; should then get the right hint (not_taken or ":nt")
7
8
9@j = external global i32
10
11define i32 @foo(i32 %a) nounwind {
12; CHECK: if{{ *}}(!p{{[0-3]}}.new) jump:nt
13entry:
14  %tobool = icmp eq i32 %a, 0
15  br i1 %tobool, label %if.else, label %if.then, !prof !0
16
17if.then:                                          ; preds = %entry
18  %add = add nsw i32 %a, 10
19  %call = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 %add) nounwind
20  br label %return
21
22if.else:                                          ; preds = %entry
23  %call2 = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 4) nounwind
24  br label %return
25
26return:                                           ; preds = %if.else, %if.then
27  %retval.0 = phi i32 [ %call, %if.then ], [ %call2, %if.else ]
28  ret i32 %retval.0
29}
30
31declare i32 @foobar(...)
32
33define i32 @bar(i32 %a) nounwind {
34; CHECK: if{{ *}}(p{{[0-3]}}.new) jump:nt
35entry:
36  %tobool = icmp eq i32 %a, 0
37  br i1 %tobool, label %if.else, label %if.then, !prof !1
38
39if.then:                                          ; preds = %entry
40  %add = add nsw i32 %a, 10
41  %call = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 %add) nounwind
42  br label %return
43
44if.else:                                          ; preds = %entry
45  %call2 = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 4) nounwind
46  br label %return
47
48return:                                           ; preds = %if.else, %if.then
49  %retval.0 = phi i32 [ %call, %if.then ], [ %call2, %if.else ]
50  ret i32 %retval.0
51}
52
53define i32 @foo_bar(i32 %a, i16 signext %b) nounwind {
54; CHECK: if{{ *}}(!cmp.eq(r{{[0-9]*}}.new, #0)) jump:nt
55entry:
56  %0 = load i32, i32* @j, align 4
57  %tobool = icmp eq i32 %0, 0
58  br i1 %tobool, label %if.else, label %if.then, !prof !0
59
60if.then:                                          ; preds = %entry
61  %add = add nsw i32 %a, 10
62  %call = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 %add) nounwind
63  br label %return
64
65if.else:                                          ; preds = %entry
66  %add1 = add nsw i32 %a, 4
67  %call2 = tail call i32 bitcast (i32 (...)* @foobar to i32 (i32)*)(i32 %add1) nounwind
68  br label %return
69
70return:                                           ; preds = %if.else, %if.then
71  %retval.0 = phi i32 [ %call, %if.then ], [ %call2, %if.else ]
72  ret i32 %retval.0
73}
74
75!0 = !{!"branch_weights", i32 64, i32 4}
76!1 = !{!"branch_weights", i32 4, i32 64}
77