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
80
81
82
83
84
85
86
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=arm64-eabi -enable-no-nans-fp-math | FileCheck %s
define double @test_direct(float %in) {
; CHECK-LABEL: test_direct:
; CHECK: // %bb.0:
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: fmaxnm s0, s0, s1
; CHECK-NEXT: fcvt d0, s0
; CHECK-NEXT: ret
%cmp = fcmp nnan olt float %in, 0.000000e+00
%val = select i1 %cmp, float 0.000000e+00, float %in
%longer = fpext float %val to double
ret double %longer
}
define double @test_cross(float %in) {
; CHECK-LABEL: test_cross:
; CHECK: // %bb.0:
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: fminnm s0, s0, s1
; CHECK-NEXT: fcvt d0, s0
; CHECK-NEXT: ret
%cmp = fcmp nnan ult float %in, 0.000000e+00
%val = select i1 %cmp, float %in, float 0.000000e+00
%longer = fpext float %val to double
ret double %longer
}
; Same as previous, but with ordered comparison;
; can't be converted in safe-math mode.
define double @test_cross_fail_nan(float %in) {
; CHECK-LABEL: test_cross_fail_nan:
; CHECK: // %bb.0:
; CHECK-NEXT: movi d1, #0000000000000000
; CHECK-NEXT: fminnm s0, s0, s1
; CHECK-NEXT: fcvt d0, s0
; CHECK-NEXT: ret
%cmp = fcmp nnan olt float %in, 0.000000e+00
%val = select i1 %cmp, float %in, float 0.000000e+00
%longer = fpext float %val to double
ret double %longer
}
; This isn't a min or a max, but passes the first condition for swapping the
; results. Make sure they're put back before we resort to the normal fcsel.
define float @test_cross_fail(float %lhs, float %rhs) {
; CHECK-LABEL: test_cross_fail:
; CHECK: // %bb.0:
; CHECK-NEXT: fcmp s0, s1
; CHECK-NEXT: fcsel s0, s1, s0, ne
; CHECK-NEXT: ret
%tst = fcmp nnan une float %lhs, %rhs
%res = select i1 %tst, float %rhs, float %lhs
ret float %res
}
; Make sure the transformation isn't triggered for integers
define i64 @test_integer(i64 %in) {
; CHECK-LABEL: test_integer:
; CHECK: // %bb.0:
; CHECK-NEXT: cmp x0, #0
; CHECK-NEXT: csel x0, xzr, x0, lt
; CHECK-NEXT: ret
%cmp = icmp slt i64 %in, 0
%val = select i1 %cmp, i64 0, i64 %in
ret i64 %val
}
; FIXME: It'd be nice for this to create an fmin instruction!
define float @test_f16(half %in) {
; CHECK-LABEL: test_f16:
; CHECK: // %bb.0:
; CHECK-NEXT: // kill: def $h0 killed $h0 def $s0
; CHECK-NEXT: fcvt s1, h0
; CHECK-NEXT: adrp x8, .LCPI5_0
; CHECK-NEXT: ldr h2, [x8, :lo12:.LCPI5_0]
; CHECK-NEXT: fcmp s1, #0.0
; CHECK-NEXT: fcsel s0, s0, s2, lt
; CHECK-NEXT: fcvt s0, h0
; CHECK-NEXT: ret
%cmp = fcmp nnan ult half %in, 0.000000e+00
%val = select i1 %cmp, half %in, half 0.000000e+00
%longer = fpext half %val to float
ret float %longer
}
|
