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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
; <rdar://problem/7859988>
; Make sure we don't generate more jumps than we need to. We used to generate
; something like this:
;
; jne LBB0_1
; jnp LBB0_2
; LBB0_1:
; jmp LBB0_3
; LBB0_2:
; addsd ...
; LBB0_3:
;
; Now we generate this:
;
; jne LBB0_2
; jp LBB0_2
; addsd ...
; LBB0_2:
define double @rdar_7859988(double %x, double %y) nounwind readnone optsize ssp {
; CHECK-LABEL: rdar_7859988:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: mulsd %xmm1, %xmm0
; CHECK-NEXT: xorpd %xmm1, %xmm1
; CHECK-NEXT: ucomisd %xmm1, %xmm0
; CHECK-NEXT: jne .LBB0_2
; CHECK-NEXT: jp .LBB0_2
; CHECK-NEXT: # %bb.1: # %bb1
; CHECK-NEXT: addsd {{.*}}(%rip), %xmm0
; CHECK-NEXT: .LBB0_2: # %bb2
; CHECK-NEXT: retq
entry:
%mul = fmul double %x, %y
%cmp = fcmp oeq double %mul, 0.000000e+00
br i1 %cmp, label %bb1, label %bb2
bb1:
%add = fadd double %mul, -1.000000e+00
br label %bb2
bb2:
%phi = phi double [ %add, %bb1 ], [ %mul, %entry ]
ret double %phi
}
define double @profile_metadata(double %x, double %y) {
; CHECK-LABEL: profile_metadata:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: mulsd %xmm1, %xmm0
; CHECK-NEXT: xorpd %xmm1, %xmm1
; CHECK-NEXT: ucomisd %xmm1, %xmm0
; CHECK-NEXT: jne .LBB1_1
; CHECK-NEXT: jp .LBB1_1
; CHECK-NEXT: # %bb2
; CHECK-NEXT: retq
; CHECK-NEXT: .LBB1_1: # %bb1
; CHECK-NEXT: addsd {{.*}}(%rip), %xmm0
; CHECK-NEXT: retq
entry:
%mul = fmul double %x, %y
%cmp = fcmp une double %mul, 0.000000e+00
br i1 %cmp, label %bb1, label %bb2, !prof !1
bb1:
%add = fadd double %mul, -1.000000e+00
br label %bb2
bb2:
%phi = phi double [ %add, %bb1 ], [ %mul, %entry ]
ret double %phi
}
; Test if the negation of the non-equality check between floating points are
; translated to jnp followed by jne.
define void @foo(float %f) {
; CHECK-LABEL: foo:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xorps %xmm1, %xmm1
; CHECK-NEXT: ucomiss %xmm1, %xmm0
; CHECK-NEXT: jne .LBB2_2
; CHECK-NEXT: jnp .LBB2_1
; CHECK-NEXT: .LBB2_2: # %if.then
; CHECK-NEXT: jmp a # TAILCALL
; CHECK-NEXT: .LBB2_1: # %if.end
; CHECK-NEXT: retq
entry:
%cmp = fcmp une float %f, 0.000000e+00
br i1 %cmp, label %if.then, label %if.end
if.then:
tail call void @a()
br label %if.end
if.end:
ret void
}
; Test that an FP oeq/une conditional branch can be inverted successfully even
; when the true and false targets are the same (PR27750).
;
; CHECK-LABEL: pr27750
; CHECK: ucomiss
; CHECK-NEXT: jne [[TARGET:.*]]
; CHECK-NEXT: jp [[TARGET]]
define void @pr27750(i32* %b, float %x, i1 %y) {
entry:
br label %for.cond
for.cond:
br label %for.cond1
for.cond1:
br i1 %y, label %for.body3.lr.ph, label %for.end
for.body3.lr.ph:
store i32 0, i32* %b, align 4
br label %for.end
for.end:
; After block %for.cond gets eliminated, the two target blocks of this
; conditional block are the same.
%tobool = fcmp une float %x, 0.000000e+00
br i1 %tobool, label %for.cond, label %for.cond1
}
declare void @a()
!1 = !{!"branch_weights", i32 1, i32 1000}
|
