xref: /llvm-project/llvm/test/Analysis/BranchProbabilityInfo/pointer_heuristics.ll (revision bb6497ffa6a88d1b3a32101d9b6519094d75ef2a) 
1; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
2
3define i32 @cmp1(ptr readnone %0, ptr readnone %1) {
4; CHECK-LABEL: 'cmp1'
5  %3 = icmp eq ptr %0, %1
6  br i1 %3, label %4, label %6
7; CHECK:   edge %2 -> %4 probability is 0x30000000 / 0x80000000 = 37.50%
8; CHECK:   edge %2 -> %6 probability is 0x50000000 / 0x80000000 = 62.50%
9
104:                                                ; preds = %2
11  %5 = tail call i32 @f() #2
12  br label %8
13; CHECK:   edge %4 -> %8 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
14
156:                                                ; preds = %2
16  %7 = tail call i32 @g() #2
17  br label %8
18; CHECK:   edge %6 -> %8 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
19
208:                                                ; preds = %6, %4
21  %9 = phi i32 [ %5, %4 ], [ %7, %6 ]
22  ret i32 %9
23}
24
25define i32 @cmp2(ptr readnone %0, ptr readnone %1) {
26; CHECK-LABEL: 'cmp2'
27  %3 = icmp eq ptr %0, %1
28  br i1 %3, label %6, label %4
29; CHECK:   edge %2 -> %6 probability is 0x30000000 / 0x80000000 = 37.50%
30; CHECK:   edge %2 -> %4 probability is 0x50000000 / 0x80000000 = 62.50%
31
324:                                                ; preds = %2
33  %5 = tail call i32 @f() #2
34  br label %8
35; CHECK:   edge %4 -> %8 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
36
376:                                                ; preds = %2
38  %7 = tail call i32 @g() #2
39  br label %8
40; CHECK:   edge %6 -> %8 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
41
428:                                                ; preds = %6, %4
43  %9 = phi i32 [ %5, %4 ], [ %7, %6 ]
44  ret i32 %9
45}
46
47define i32 @cmp3(ptr readnone %0) {
48; CHECK-LABEL: 'cmp3'
49  %2 = icmp eq ptr %0, null
50  br i1 %2, label %3, label %5
51; CHECK:   edge %1 -> %3 probability is 0x30000000 / 0x80000000 = 37.50%
52; CHECK:   edge %1 -> %5 probability is 0x50000000 / 0x80000000 = 62.50%
53
543:                                                ; preds = %1
55  %4 = tail call i32 @f() #2
56  br label %7
57; CHECK:   edge %3 -> %7 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
58
595:                                                ; preds = %1
60  %6 = tail call i32 @g() #2
61  br label %7
62; CHECK:   edge %5 -> %7 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
63
647:                                                ; preds = %5, %3
65  %8 = phi i32 [ %6, %5 ], [ %4, %3 ]
66  ret i32 %8
67}
68
69declare dso_local i32 @f(...) local_unnamed_addr #1
70declare dso_local i32 @g(...) local_unnamed_addr #1
71