reference, declaration → definition
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

; Test 16-bit byteswaps from memory to registers.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s

declare i16 @llvm.bswap.i16(i16 %a)

; Check LRVH with no displacement.
define i16 @f1(i16 *%src) {
; CHECK-LABEL: f1:
; CHECK: lrvh %r2, 0(%r2)
; CHECK: br %r14
  %a = load i16, i16 *%src
  %swapped = call i16 @llvm.bswap.i16(i16 %a)
  ret i16 %swapped
}

; Check the high end of the aligned LRVH range.
define i16 @f2(i16 *%src) {
; CHECK-LABEL: f2:
; CHECK: lrvh %r2, 524286(%r2)
; CHECK: br %r14
  %ptr = getelementptr i16, i16 *%src, i64 262143
  %a = load i16, i16 *%ptr
  %swapped = call i16 @llvm.bswap.i16(i16 %a)
  ret i16 %swapped
}

; Check the next word up, which needs separate address logic.
; Other sequences besides this one would be OK.
define i16 @f3(i16 *%src) {
; CHECK-LABEL: f3:
; CHECK: agfi %r2, 524288
; CHECK: lrvh %r2, 0(%r2)
; CHECK: br %r14
  %ptr = getelementptr i16, i16 *%src, i64 262144
  %a = load i16, i16 *%ptr
  %swapped = call i16 @llvm.bswap.i16(i16 %a)
  ret i16 %swapped
}

; Check the high end of the negative aligned LRVH range.
define i16 @f4(i16 *%src) {
; CHECK-LABEL: f4:
; CHECK: lrvh %r2, -2(%r2)
; CHECK: br %r14
  %ptr = getelementptr i16, i16 *%src, i64 -1
  %a = load i16, i16 *%ptr
  %swapped = call i16 @llvm.bswap.i16(i16 %a)
  ret i16 %swapped
}

; Check the low end of the LRVH range.
define i16 @f5(i16 *%src) {
; CHECK-LABEL: f5:
; CHECK: lrvh %r2, -524288(%r2)
; CHECK: br %r14
  %ptr = getelementptr i16, i16 *%src, i64 -262144
  %a = load i16, i16 *%ptr
  %swapped = call i16 @llvm.bswap.i16(i16 %a)
  ret i16 %swapped
}

; Check the next word down, which needs separate address logic.
; Other sequences besides this one would be OK.
define i16 @f6(i16 *%src) {
; CHECK-LABEL: f6:
; CHECK: agfi %r2, -524290
; CHECK: lrvh %r2, 0(%r2)
; CHECK: br %r14
  %ptr = getelementptr i16, i16 *%src, i64 -262145
  %a = load i16, i16 *%ptr
  %swapped = call i16 @llvm.bswap.i16(i16 %a)
  ret i16 %swapped
}

; Check that LRVH allows an index.
define i16 @f7(i64 %src, i64 %index) {
; CHECK-LABEL: f7:
; CHECK: lrvh %r2, 524287({{%r3,%r2|%r2,%r3}})
; CHECK: br %r14
  %add1 = add i64 %src, %index
  %add2 = add i64 %add1, 524287
  %ptr = inttoptr i64 %add2 to i16 *
  %a = load i16, i16 *%ptr
  %swapped = call i16 @llvm.bswap.i16(i16 %a)
  ret i16 %swapped
}