xref: /aosp_15_r20/external/llvm/test/CodeGen/SystemZ/int-cmp-12.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)

; Test 64-bit unsigned comparisons in which the second operand is constant.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s

; Check a value near the low end of the range.  We use signed forms for
; comparisons with zero, or things that are equivalent to them.
define double @f1(double %a, double %b, i64 %i1) {
; CHECK-LABEL: f1:
; CHECK: clgijh %r2, 1
; CHECK: ldr %f0, %f2
; CHECK: br %r14
  %cond = icmp ugt i64 %i1, 1
  %tmp = select i1 %cond, double %a, double %b
  %res = fadd double %tmp, 1.0
  ret double %res
}

; Check the top of the CLGIJ range.
define double @f2(double %a, double %b, i64 %i1) {
; CHECK-LABEL: f2:
; CHECK: clgijl %r2, 255
; CHECK: ldr %f0, %f2
; CHECK: br %r14
  %cond = icmp ult i64 %i1, 255
  %tmp = select i1 %cond, double %a, double %b
  %res = fadd double %tmp, 1.0
  ret double %res
}

; Check the next value up, which needs a separate comparison.
define double @f3(double %a, double %b, i64 %i1) {
; CHECK-LABEL: f3:
; CHECK: clgfi %r2, 256
; CHECK: jl
; CHECK: ldr %f0, %f2
; CHECK: br %r14
  %cond = icmp ult i64 %i1, 256
  %tmp = select i1 %cond, double %a, double %b
  %res = fadd double %tmp, 1.0
  ret double %res
}

; Check the high end of the CLGFI range.
define double @f4(double %a, double %b, i64 %i1) {
; CHECK-LABEL: f4:
; CHECK: clgfi %r2, 4294967295
; CHECK-NEXT: jl
; CHECK: ldr %f0, %f2
; CHECK: br %r14
  %cond = icmp ult i64 %i1, 4294967295
  %tmp = select i1 %cond, double %a, double %b
  %res = fadd double %tmp, 1.0
  ret double %res
}

; Check the next value up, which can use a shifted comparison
define double @f5(double %a, double %b, i64 %i1) {
; CHECK-LABEL: f5:
; CHECK: srlg [[REG:%r[0-5]]], %r2, 32
; CHECK: cgije [[REG]], 0
; CHECK: ldr %f0, %f2
; CHECK: br %r14
  %cond = icmp ult i64 %i1, 4294967296
  %tmp = select i1 %cond, double %a, double %b
  %res = fadd double %tmp, 1.0
  ret double %res
}
; Check the next value up, which must use a register comparison.
define double @f6(double %a, double %b, i64 %i1) {
; CHECK-LABEL: f6:
; CHECK: clgrjl %r2,
; CHECK: ldr %f0, %f2
; CHECK: br %r14
  %cond = icmp ult i64 %i1, 4294967297
  %tmp = select i1 %cond, double %a, double %b
  %res = fadd double %tmp, 1.0
  ret double %res
}