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
78
79
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s
; and can be eliminated
define i32 @test_call_known_max_range() #0 {
; CHECK-LABEL: test_call_known_max_range:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: bl foo
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
entry:
%id = tail call i32 @foo(), !range !0, !noundef !{}
%and = and i32 %id, 1023
ret i32 %and
}
define i32 @test_call_known_trunc_1_bit_range() #0 {
; CHECK-LABEL: test_call_known_trunc_1_bit_range:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: bl foo
; CHECK-NEXT: and w0, w0, #0x1ff
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
entry:
%id = tail call i32 @foo(), !range !0, !noundef !{}
%and = and i32 %id, 511
ret i32 %and
}
define i32 @test_call_known_max_range_m1() #0 {
; CHECK-LABEL: test_call_known_max_range_m1:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: bl foo
; CHECK-NEXT: and w0, w0, #0xff
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
entry:
%id = tail call i32 @foo(), !range !1, !noundef !{}
%and = and i32 %id, 255
ret i32 %and
}
; and can be eliminated
define i32 @test_call_known_max_range_attr() #0 {
; CHECK-LABEL: test_call_known_max_range_attr:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: bl foo
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
entry:
%id = tail call noundef range(i32 0, 1024) i32 @foo()
%and = and i32 %id, 1023
ret i32 %and
}
define i32 @test_call_known_max_range_attr_no_noundef() #0 {
; CHECK-LABEL: test_call_known_max_range_attr_no_noundef:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: bl foo
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
entry:
%id = tail call range(i32 0, 1024) i32 @foo()
%and = and i32 %id, 1023
ret i32 %and
}
declare i32 @foo()
attributes #0 = { norecurse nounwind }
attributes #1 = { nounwind readnone }
!0 = !{i32 0, i32 1024}
!1 = !{i32 0, i32 1023}
|
