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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
; Tests folding constants from two similar selects that feed a add
define float @test1a(i1 zeroext %arg) #0 {
; CHECK-LABEL: @test1a(
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG:%.*]], float 6.000000e+00, float 1.500000e+01
; CHECK-NEXT: ret float [[TMP2]]
;
%tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00
%tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00
%tmp2 = fadd float %tmp, %tmp1
ret float %tmp2
}
; Tests folding multiple expression constants from similar selects that feed a adds
define float @test1b(i1 zeroext %arg) #0 {
; CHECK-LABEL: @test1b(
; CHECK-NEXT: [[TMP5:%.*]] = select i1 [[ARG:%.*]], float 7.250000e+00, float 2.800000e+01
; CHECK-NEXT: ret float [[TMP5]]
;
%tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00
%tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00
%tmp2 = select i1 %arg, float 2.500000e-01, float 4.000000e+00
%tmp3 = fadd float %tmp, %tmp1
%tmp4 = fadd float %tmp2, %tmp1
%tmp5 = fadd float %tmp4, %tmp3
ret float %tmp5
}
; Tests folding constants from two similar selects that feed a sub
define float @test2(i1 zeroext %arg) #0 {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG:%.*]], float 4.000000e+00, float -3.000000e+00
; CHECK-NEXT: ret float [[TMP2]]
;
%tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00
%tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00
%tmp2 = fsub float %tmp, %tmp1
ret float %tmp2
}
; Tests folding constants from two similar selects that feed a mul
define float @test3(i1 zeroext %arg) #0 {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG:%.*]], float 5.000000e+00, float 5.400000e+01
; CHECK-NEXT: ret float [[TMP2]]
;
%tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00
%tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00
%tmp2 = fmul float %tmp, %tmp1
ret float %tmp2
}
declare void @use_float(float)
; Tests folding constants if the selects have multiple uses but
; we can fold away the binary op with a select.
define float @test4(i1 zeroext %arg) #0 {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[TMP:%.*]] = select i1 [[ARG:%.*]], float 5.000000e+00, float 6.000000e+00
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG]], float 5.000000e+00, float 5.400000e+01
; CHECK-NEXT: call void @use_float(float [[TMP]])
; CHECK-NEXT: ret float [[TMP2]]
;
%tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00
%tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00
%tmp2 = fmul float %tmp, %tmp1
call void @use_float(float %tmp)
ret float %tmp2
}
; Tests not folding constants if we cannot fold away any of the selects.
define float @test5(i1 zeroext %arg, float %div) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[TMP:%.*]] = select i1 [[ARG:%.*]], float [[DIV:%.*]], float 5.000000e+00
; CHECK-NEXT: [[MUL:%.*]] = fmul contract float [[TMP]], [[TMP]]
; CHECK-NEXT: call void @use_float(float [[TMP]])
; CHECK-NEXT: ret float [[MUL]]
;
%tmp = select i1 %arg, float %div, float 5.000000e+00
%mul = fmul contract float %tmp, %tmp
call void @use_float(float %tmp)
ret float %mul
}
|
