llvm/test/Transforms/InstCombine/icmp-signmask.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s

define i1 @cmp_x_and_negp2_with_eq(i8 %x) {
; CHECK-LABEL: @cmp_x_and_negp2_with_eq(
; CHECK-NEXT:    [[R:%.*]] = icmp slt i8 [[X:%.*]], -126
; CHECK-NEXT:    ret i1 [[R]]
;
  %andx = and i8 %x, -2
  %r = icmp eq i8 %andx, 128
  ret i1 %r
}

define i1 @cmp_x_and_negp2_with_eq_fail_not_signmask(i8 %x) {
; CHECK-LABEL: @cmp_x_and_negp2_with_eq_fail_not_signmask(
; CHECK-NEXT:    [[ANDX:%.*]] = and i8 [[X:%.*]], -2
; CHECK-NEXT:    [[R:%.*]] = icmp eq i8 [[ANDX]], -124
; CHECK-NEXT:    ret i1 [[R]]
;
  %andx = and i8 %x, -2
  %r = icmp eq i8 %andx, 132
  ret i1 %r
}

define <2 x i1> @cmp_x_and_negp2_with_ne(<2 x i8> %x) {
; CHECK-LABEL: @cmp_x_and_negp2_with_ne(
; CHECK-NEXT:    [[R:%.*]] = icmp sgt <2 x i8> [[X:%.*]], <i8 -121, i8 -113>
; CHECK-NEXT:    ret <2 x i1> [[R]]
;
  %andx = and <2 x i8> %x, <i8 -8, i8 -16>
  %r = icmp ne <2 x i8> %andx, <i8 128, i8 128>
  ret <2 x i1> %r
}

define <2 x i1> @cmp_x_and_negp2_with_ne_or_z(<2 x i8> %x) {
; CHECK-LABEL: @cmp_x_and_negp2_with_ne_or_z(
; CHECK-NEXT:    [[R:%.*]] = icmp sge <2 x i8> [[X:%.*]], <i8 -128, i8 -112>
; CHECK-NEXT:    ret <2 x i1> [[R]]
;
  %andx = and <2 x i8> %x, <i8 0, i8 -16>
  %r = icmp ne <2 x i8> %andx, <i8 128, i8 128>
  ret <2 x i1> %r
}

define <2 x i1> @cmp_x_and_negp2_with_ne_fail_not_p2(<2 x i8> %x) {
; CHECK-LABEL: @cmp_x_and_negp2_with_ne_fail_not_p2(
; CHECK-NEXT:    [[ANDX:%.*]] = and <2 x i8> [[X:%.*]], <i8 -8, i8 -15>
; CHECK-NEXT:    [[R:%.*]] = icmp ne <2 x i8> [[ANDX]], splat (i8 -128)
; CHECK-NEXT:    ret <2 x i1> [[R]]
;
  %andx = and <2 x i8> %x, <i8 -8, i8 -15>
  %r = icmp ne <2 x i8> %andx, <i8 128, i8 128>
  ret <2 x i1> %r
}