1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -simplifycfg -S | FileCheck %s
3
4@G = extern_weak global i32
5
6; PR3354
7; Do not merge bb1 into the entry block, it might trap.
8
9define i32 @admiral(i32 %a, i32 %b) {
10; CHECK-LABEL: @admiral(
11; CHECK-NEXT:    [[C:%.*]] = icmp sle i32 %a, %b
12; CHECK-NEXT:    br i1 [[C]], label %bb2, label %bb1
13; CHECK:       bb1:
14; CHECK-NEXT:    [[D:%.*]] = icmp sgt i32 sdiv (i32 -32768, i32 ptrtoint (i32* @G to i32)), 0
15; CHECK-NEXT:    [[DOT:%.*]] = select i1 [[D]], i32 927, i32 42
16; CHECK-NEXT:    br label %bb2
17; CHECK:       bb2:
18; CHECK-NEXT:    [[MERGE:%.*]] = phi i32 [ 42, %0 ], [ [[DOT]], %bb1 ]
19; CHECK-NEXT:    ret i32 [[MERGE]]
20;
21  %c = icmp sle i32 %a, %b
22  br i1 %c, label %bb2, label %bb1
23bb1:
24  %d = icmp sgt i32 sdiv (i32 -32768, i32 ptrtoint (i32* @G to i32)), 0
25  br i1 %d, label %bb6, label %bb2
26bb2:
27  ret i32 42
28bb6:
29  ret i32 927
30}
31
32define i32 @ackbar(i1 %c) {
33; CHECK-LABEL: @ackbar(
34; CHECK-NEXT:    br i1 %c, label %bb5, label %bb6
35; CHECK:       bb5:
36; CHECK-NEXT:    [[DOT:%.*]] = select i1 icmp sgt (i32 sdiv (i32 32767, i32 ptrtoint (i32* @G to i32)), i32 0), i32 42, i32 927
37; CHECK-NEXT:    br label %bb6
38; CHECK:       bb6:
39; CHECK-NEXT:    [[MERGE:%.*]] = phi i32 [ 42, %0 ], [ [[DOT]], %bb5 ]
40; CHECK-NEXT:    ret i32 [[MERGE]]
41;
42  br i1 %c, label %bb5, label %bb6
43bb5:
44  br i1 icmp sgt (i32 sdiv (i32 32767, i32 ptrtoint (i32* @G to i32)), i32 0), label %bb6, label %bb7
45bb6:
46  ret i32 42
47bb7:
48  ret i32 927
49}
50
51; FP ops don't trap by default, so this is safe to hoist.
52
53define i32 @tarp(i1 %c) {
54; CHECK-LABEL: @tarp(
55; CHECK-NEXT:  bb9:
56; CHECK-NEXT:    [[DOT:%.*]] = select i1 fcmp oeq (float fdiv (float 3.000000e+00, float sitofp (i32 ptrtoint (i32* @G to i32) to float)), float 1.000000e+00), i32 42, i32 927
57; CHECK-NEXT:    [[MERGE:%.*]] = select i1 %c, i32 [[DOT]], i32 42
58; CHECK-NEXT:    ret i32 [[MERGE]]
59;
60  br i1 %c, label %bb8, label %bb9
61bb8:
62  br i1 fcmp oeq (float fdiv (float 3.0, float sitofp (i32 ptrtoint (i32* @G to i32) to float)), float 1.0), label %bb9, label %bb10
63bb9:
64  ret i32 42
65bb10:
66  ret i32 927
67}
68