File: add-sitofp.ll

package info (click to toggle)
llvm-toolchain-6.0 1:6.0-1~bpo9+1
  • links: PTS, VCS
  • area: main
  • in suites: stretch-backports
  • size: 594,652 kB
  • sloc: cpp: 3,044,500; ansic: 595,051; asm: 271,890; python: 128,923; objc: 106,554; sh: 21,854; lisp: 10,191; pascal: 6,094; ml: 5,544; perl: 5,265; makefile: 2,214; cs: 2,027; xml: 686; php: 212; csh: 117
file content (141 lines) | stat: -rw-r--r-- 5,572 bytes parent folder | download | duplicates (17)
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
136
137
138
139
140
141
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s

define double @x(i32 %a, i32 %b) {
; CHECK-LABEL: @x(
; CHECK-NEXT:    [[M:%.*]] = lshr i32 [[A:%.*]], 24
; CHECK-NEXT:    [[N:%.*]] = and i32 [[M]], [[B:%.*]]
; CHECK-NEXT:    [[ADDCONV:%.*]] = add nuw nsw i32 [[N]], 1
; CHECK-NEXT:    [[P:%.*]] = sitofp i32 [[ADDCONV]] to double
; CHECK-NEXT:    ret double [[P]]
;
  %m = lshr i32 %a, 24
  %n = and i32 %m, %b
  %o = sitofp i32 %n to double
  %p = fadd double %o, 1.0
  ret double %p
}

define double @test(i32 %a) {
; CHECK-LABEL: @test(
; CHECK-NEXT:    [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
; CHECK-NEXT:    [[ADDCONV:%.*]] = add nuw nsw i32 [[A_AND]], 1
; CHECK-NEXT:    [[RES:%.*]] = sitofp i32 [[ADDCONV]] to double
; CHECK-NEXT:    ret double [[RES]]
;
  ; Drop two highest bits to guarantee that %a + 1 doesn't overflow
  %a_and = and i32 %a, 1073741823
  %a_and_fp = sitofp i32 %a_and to double
  %res = fadd double %a_and_fp, 1.0
  ret double %res
}

define float @test_neg(i32 %a) {
; CHECK-LABEL: @test_neg(
; CHECK-NEXT:    [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
; CHECK-NEXT:    [[A_AND_FP:%.*]] = sitofp i32 [[A_AND]] to float
; CHECK-NEXT:    [[RES:%.*]] = fadd float [[A_AND_FP]], 1.000000e+00
; CHECK-NEXT:    ret float [[RES]]
;
  ; Drop two highest bits to guarantee that %a + 1 doesn't overflow
  %a_and = and i32 %a, 1073741823
  %a_and_fp = sitofp i32 %a_and to float
  %res = fadd float %a_and_fp, 1.0
  ret float %res
}

define double @test_2(i32 %a, i32 %b) {
; CHECK-LABEL: @test_2(
; CHECK-NEXT:    [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
; CHECK-NEXT:    [[B_AND:%.*]] = and i32 [[B:%.*]], 1073741823
; CHECK-NEXT:    [[ADDCONV:%.*]] = add nuw nsw i32 [[A_AND]], [[B_AND]]
; CHECK-NEXT:    [[RES:%.*]] = sitofp i32 [[ADDCONV]] to double
; CHECK-NEXT:    ret double [[RES]]
;
  ; Drop two highest bits to guarantee that %a + %b doesn't overflow
  %a_and = and i32 %a, 1073741823
  %b_and = and i32 %b, 1073741823

  %a_and_fp = sitofp i32 %a_and to double
  %b_and_fp = sitofp i32 %b_and to double

  %res = fadd double %a_and_fp, %b_and_fp
  ret double %res
}

define float @test_2_neg(i32 %a, i32 %b) {
; CHECK-LABEL: @test_2_neg(
; CHECK-NEXT:    [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
; CHECK-NEXT:    [[B_AND:%.*]] = and i32 [[B:%.*]], 1073741823
; CHECK-NEXT:    [[A_AND_FP:%.*]] = sitofp i32 [[A_AND]] to float
; CHECK-NEXT:    [[B_AND_FP:%.*]] = sitofp i32 [[B_AND]] to float
; CHECK-NEXT:    [[RES:%.*]] = fadd float [[A_AND_FP]], [[B_AND_FP]]
; CHECK-NEXT:    ret float [[RES]]
;
  ; Drop two highest bits to guarantee that %a + %b doesn't overflow
  %a_and = and i32 %a, 1073741823
  %b_and = and i32 %b, 1073741823

  %a_and_fp = sitofp i32 %a_and to float
  %b_and_fp = sitofp i32 %b_and to float

  %res = fadd float %a_and_fp, %b_and_fp
  ret float %res
}

; This test demonstrates overly conservative legality check. The float addition
; can be replaced with the integer addition because the result of the operation
; can be represented in float, but we don't do that now.
define float @test_3(i32 %a, i32 %b) {
; CHECK-LABEL: @test_3(
; CHECK-NEXT:    [[M:%.*]] = lshr i32 [[A:%.*]], 24
; CHECK-NEXT:    [[N:%.*]] = and i32 [[M]], [[B:%.*]]
; CHECK-NEXT:    [[O:%.*]] = sitofp i32 [[N]] to float
; CHECK-NEXT:    [[P:%.*]] = fadd float [[O]], 1.000000e+00
; CHECK-NEXT:    ret float [[P]]
;
  %m = lshr i32 %a, 24
  %n = and i32 %m, %b
  %o = sitofp i32 %n to float
  %p = fadd float %o, 1.0
  ret float %p
}

define <4 x double> @test_4(<4 x i32> %a, <4 x i32> %b) {
; CHECK-LABEL: @test_4(
; CHECK-NEXT:    [[A_AND:%.*]] = and <4 x i32> [[A:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
; CHECK-NEXT:    [[B_AND:%.*]] = and <4 x i32> [[B:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
; CHECK-NEXT:    [[ADDCONV:%.*]] = add nuw nsw <4 x i32> [[A_AND]], [[B_AND]]
; CHECK-NEXT:    [[RES:%.*]] = sitofp <4 x i32> [[ADDCONV]] to <4 x double>
; CHECK-NEXT:    ret <4 x double> [[RES]]
;
  ; Drop two highest bits to guarantee that %a + %b doesn't overflow
  %a_and = and <4 x i32> %a, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
  %b_and = and <4 x i32> %b, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>

  %a_and_fp = sitofp <4 x i32> %a_and to <4 x double>
  %b_and_fp = sitofp <4 x i32> %b_and to <4 x double>

  %res = fadd <4 x double> %a_and_fp, %b_and_fp
  ret <4 x double> %res
}

define <4 x float> @test_4_neg(<4 x i32> %a, <4 x i32> %b) {
; CHECK-LABEL: @test_4_neg(
; CHECK-NEXT:    [[A_AND:%.*]] = and <4 x i32> [[A:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
; CHECK-NEXT:    [[B_AND:%.*]] = and <4 x i32> [[B:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
; CHECK-NEXT:    [[A_AND_FP:%.*]] = sitofp <4 x i32> [[A_AND]] to <4 x float>
; CHECK-NEXT:    [[B_AND_FP:%.*]] = sitofp <4 x i32> [[B_AND]] to <4 x float>
; CHECK-NEXT:    [[RES:%.*]] = fadd <4 x float> [[A_AND_FP]], [[B_AND_FP]]
; CHECK-NEXT:    ret <4 x float> [[RES]]
;
  ; Drop two highest bits to guarantee that %a + %b doesn't overflow
  %a_and = and <4 x i32> %a, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
  %b_and = and <4 x i32> %b, <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>

  %a_and_fp = sitofp <4 x i32> %a_and to <4 x float>
  %b_and_fp = sitofp <4 x i32> %b_and to <4 x float>

  %res = fadd <4 x float> %a_and_fp, %b_and_fp
  ret <4 x float> %res
}