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
   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

; Test that compares are omitted if CC already has the right value
; (z196 version).
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 -no-integrated-as | FileCheck %s

; Addition provides enough for equality comparisons with zero.  First teest
; the EQ case with LOC.
define i32 @f1(i32 %a, i32 %b, i32 *%cptr) {
; CHECK-LABEL: f1:
; CHECK: afi %r2, 1000000
; CHECK-NEXT: loce %r3, 0(%r4)
; CHECK: br %r14
  %add = add i32 %a, 1000000
  %cmp = icmp eq i32 %add, 0
  %c = load i32, i32 *%cptr
  %arg = select i1 %cmp, i32 %c, i32 %b
  call void asm sideeffect "blah $0", "{r3}"(i32 %arg)
  ret i32 %add
}

; ...and again with STOC.
define i32 @f2(i32 %a, i32 %b, i32 *%cptr) {
; CHECK-LABEL: f2:
; CHECK: afi %r2, 1000000
; CHECK-NEXT: stoce %r3, 0(%r4)
; CHECK: br %r14
  %add = add i32 %a, 1000000
  %cmp = icmp eq i32 %add, 0
  %c = load i32, i32 *%cptr
  %newval = select i1 %cmp, i32 %b, i32 %c
  store i32 %newval, i32 *%cptr
  ret i32 %add
}

; Reverse the select order and test with LOCR.
define i32 @f3(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: f3:
; CHECK: afi %r2, 1000000
; CHECK-NEXT: locrne %r3, %r4
; CHECK: br %r14
  %add = add i32 %a, 1000000
  %cmp = icmp eq i32 %add, 0
  %arg = select i1 %cmp, i32 %b, i32 %c
  call void asm sideeffect "blah $0", "{r3}"(i32 %arg)
  ret i32 %add
}

; ...and again with LOC.
define i32 @f4(i32 %a, i32 %b, i32 *%cptr) {
; CHECK-LABEL: f4:
; CHECK: afi %r2, 1000000
; CHECK-NEXT: locne %r3, 0(%r4)
; CHECK: br %r14
  %add = add i32 %a, 1000000
  %cmp = icmp eq i32 %add, 0
  %c = load i32, i32 *%cptr
  %arg = select i1 %cmp, i32 %b, i32 %c
  call void asm sideeffect "blah $0", "{r3}"(i32 %arg)
  ret i32 %add
}

; ...and again with STOC.
define i32 @f5(i32 %a, i32 %b, i32 *%cptr) {
; CHECK-LABEL: f5:
; CHECK: afi %r2, 1000000
; CHECK-NEXT: stocne %r3, 0(%r4)
; CHECK: br %r14
  %add = add i32 %a, 1000000
  %cmp = icmp eq i32 %add, 0
  %c = load i32, i32 *%cptr
  %newval = select i1 %cmp, i32 %c, i32 %b
  store i32 %newval, i32 *%cptr
  ret i32 %add
}

; Change the EQ in f3 to NE.
define i32 @f6(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: f6:
; CHECK: afi %r2, 1000000
; CHECK-NEXT: locre %r3, %r4
; CHECK: br %r14
  %add = add i32 %a, 1000000
  %cmp = icmp ne i32 %add, 0
  %arg = select i1 %cmp, i32 %b, i32 %c
  call void asm sideeffect "blah $0", "{r3}"(i32 %arg)
  ret i32 %add
}

; ...and again with LOC.
define i32 @f7(i32 %a, i32 %b, i32 *%cptr) {
; CHECK-LABEL: f7:
; CHECK: afi %r2, 1000000
; CHECK-NEXT: loce %r3, 0(%r4)
; CHECK: br %r14
  %add = add i32 %a, 1000000
  %cmp = icmp ne i32 %add, 0
  %c = load i32, i32 *%cptr
  %arg = select i1 %cmp, i32 %b, i32 %c
  call void asm sideeffect "blah $0", "{r3}"(i32 %arg)
  ret i32 %add
}

; ...and again with STOC.
define i32 @f8(i32 %a, i32 %b, i32 *%cptr) {
; CHECK-LABEL: f8:
; CHECK: afi %r2, 1000000
; CHECK-NEXT: stoce %r3, 0(%r4)
; CHECK: br %r14
  %add = add i32 %a, 1000000
  %cmp = icmp ne i32 %add, 0
  %c = load i32, i32 *%cptr
  %newval = select i1 %cmp, i32 %c, i32 %b
  store i32 %newval, i32 *%cptr
  ret i32 %add
}