reference, declarationdefinition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced
    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
  142
  143
  144
  145
  146
  147
  148
  149
  150
  151
  152
  153
  154
  155
  156
  157
  158
  159
  160
  161
  162
  163
  164
  165
; Test ANDs of a constant into a byte of memory.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s

; Check the lowest useful constant, expressed as a signed integer.
define void @f1(i8 *%ptr) {
; CHECK-LABEL: f1:
; CHECK: ni 0(%r2), 1
; CHECK: br %r14
  %val = load i8, i8 *%ptr
  %and = and i8 %val, -255
  store i8 %and, i8 *%ptr
  ret void
}

; Check the highest useful constant, expressed as a signed integer.
define void @f2(i8 *%ptr) {
; CHECK-LABEL: f2:
; CHECK: ni 0(%r2), 254
; CHECK: br %r14
  %val = load i8, i8 *%ptr
  %and = and i8 %val, -2
  store i8 %and, i8 *%ptr
  ret void
}

; Check the lowest useful constant, expressed as an unsigned integer.
define void @f3(i8 *%ptr) {
; CHECK-LABEL: f3:
; CHECK: ni 0(%r2), 1
; CHECK: br %r14
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 1
  store i8 %and, i8 *%ptr
  ret void
}

; Check the highest useful constant, expressed as a unsigned integer.
define void @f4(i8 *%ptr) {
; CHECK-LABEL: f4:
; CHECK: ni 0(%r2), 254
; CHECK: br %r14
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 254
  store i8 %and, i8 *%ptr
  ret void
}

; Check the high end of the NI range.
define void @f5(i8 *%src) {
; CHECK-LABEL: f5:
; CHECK: ni 4095(%r2), 127
; CHECK: br %r14
  %ptr = getelementptr i8, i8 *%src, i64 4095
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 127
  store i8 %and, i8 *%ptr
  ret void
}

; Check the next byte up, which should use NIY instead of NI.
define void @f6(i8 *%src) {
; CHECK-LABEL: f6:
; CHECK: niy 4096(%r2), 127
; CHECK: br %r14
  %ptr = getelementptr i8, i8 *%src, i64 4096
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 127
  store i8 %and, i8 *%ptr
  ret void
}

; Check the high end of the NIY range.
define void @f7(i8 *%src) {
; CHECK-LABEL: f7:
; CHECK: niy 524287(%r2), 127
; CHECK: br %r14
  %ptr = getelementptr i8, i8 *%src, i64 524287
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 127
  store i8 %and, i8 *%ptr
  ret void
}

; Check the next byte up, which needs separate address logic.
; Other sequences besides this one would be OK.
define void @f8(i8 *%src) {
; CHECK-LABEL: f8:
; CHECK: agfi %r2, 524288
; CHECK: ni 0(%r2), 127
; CHECK: br %r14
  %ptr = getelementptr i8, i8 *%src, i64 524288
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 127
  store i8 %and, i8 *%ptr
  ret void
}

; Check the high end of the negative NIY range.
define void @f9(i8 *%src) {
; CHECK-LABEL: f9:
; CHECK: niy -1(%r2), 127
; CHECK: br %r14
  %ptr = getelementptr i8, i8 *%src, i64 -1
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 127
  store i8 %and, i8 *%ptr
  ret void
}

; Check the low end of the NIY range.
define void @f10(i8 *%src) {
; CHECK-LABEL: f10:
; CHECK: niy -524288(%r2), 127
; CHECK: br %r14
  %ptr = getelementptr i8, i8 *%src, i64 -524288
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 127
  store i8 %and, i8 *%ptr
  ret void
}

; Check the next byte down, which needs separate address logic.
; Other sequences besides this one would be OK.
define void @f11(i8 *%src) {
; CHECK-LABEL: f11:
; CHECK: agfi %r2, -524289
; CHECK: ni 0(%r2), 127
; CHECK: br %r14
  %ptr = getelementptr i8, i8 *%src, i64 -524289
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 127
  store i8 %and, i8 *%ptr
  ret void
}

; Check that NI does not allow an index
define void @f12(i64 %src, i64 %index) {
; CHECK-LABEL: f12:
; CHECK: agr %r2, %r3
; CHECK: ni 4095(%r2), 127
; CHECK: br %r14
  %add1 = add i64 %src, %index
  %add2 = add i64 %add1, 4095
  %ptr = inttoptr i64 %add2 to i8 *
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 127
  store i8 %and, i8 *%ptr
  ret void
}

; Check that NIY does not allow an index
define void @f13(i64 %src, i64 %index) {
; CHECK-LABEL: f13:
; CHECK: agr %r2, %r3
; CHECK: niy 4096(%r2), 127
; CHECK: br %r14
  %add1 = add i64 %src, %index
  %add2 = add i64 %add1, 4096
  %ptr = inttoptr i64 %add2 to i8 *
  %val = load i8, i8 *%ptr
  %and = and i8 %val, 127
  store i8 %and, i8 *%ptr
  ret void
}