File: branch-relax-bcc.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (77 lines) | stat: -rw-r--r-- 1,858 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
; RUN: llc -mtriple=aarch64-apple-darwin -aarch64-bcc-offset-bits=3 < %s | FileCheck %s

; CHECK-LABEL: invert_bcc:
; CHECK:      fcmp s0, s1
; CHECK-NEXT: b.ne [[JUMP_BB1:LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: b [[BB1:LBB[0-9]+_[0-9]+]]

; CHECK-NEXT: [[JUMP_BB1]]:
; CHECK-NEXT: b.vc [[BB2:LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: b [[BB1]]

; CHECK: [[BB2]]: ; %bb2
; CHECK: mov w{{[0-9]+}}, #9
; CHECK: ret

; CHECK: [[BB1]]: ; %bb1
; CHECK: mov w{{[0-9]+}}, #42
; CHECK: ret

define i32 @invert_bcc(float %x, float %y) #0 {
  %1 = fcmp ueq float %x, %y
  br i1 %1, label %bb1, label %bb2

bb2:
  call void asm sideeffect
    "nop
     nop",
    ""() #0
  store volatile i32 9, i32* undef
  ret i32 1

bb1:
  store volatile i32 42, i32* undef
  ret i32 0
}

declare i32 @foo() #0

; CHECK-LABEL: _block_split:
; CHECK: cmp w0, #5
; CHECK-NEXT: b.ne [[LOR_LHS_FALSE_BB:LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: b [[IF_THEN_BB:LBB[0-9]+_[0-9]+]]

; CHECK: [[LOR_LHS_FALSE_BB]]:
; CHECK: cmp w{{[0-9]+}}, #16
; CHECK-NEXT: b.le [[IF_THEN_BB]]
; CHECK-NEXT: b [[IF_END_BB:LBB[0-9]+_[0-9]+]]

; CHECK: [[IF_THEN_BB]]:
; CHECK: bl _foo
; CHECK-NOT: b L

; CHECK: [[IF_END_BB]]:
; CHECK: mov{{.*}}, #7
; CHECK: ret
define i32 @block_split(i32 %a, i32 %b) #0 {
entry:
  %cmp = icmp eq i32 %a, 5
  br i1 %cmp, label %if.then, label %lor.lhs.false

lor.lhs.false:                                    ; preds = %entry
  %cmp1 = icmp slt i32 %b, 7
  %mul = shl nsw i32 %b, 1
  %add = add nsw i32 %b, 1
  %cond = select i1 %cmp1, i32 %mul, i32 %add
  %cmp2 = icmp slt i32 %cond, 17
  br i1 %cmp2, label %if.then, label %if.end

if.then:                                          ; preds = %lor.lhs.false, %entry
  %call = tail call i32 @foo()
  br label %if.end

if.end:                                           ; preds = %if.then, %lor.lhs.false
  ret i32 7
}

attributes #0 = { nounwind }