llvm/test/Transforms/InstCombine/constant-fold-nextafter.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt -passes=instcombine -S < %s | FileCheck %s

@flt_nan = constant float 0x7FF8000000000000, align 4
@flt_pos_min_subnormal = constant float 0x36A0000000000000, align 4
@flt_pos_min_normal = constant float 0x3810000000000000, align 4
@flt_pos_max = constant float 0x47EFFFFFE0000000, align 4
@flt_pos_infinity = constant float 0x7FF0000000000000, align 4
@flt_neg_min_subnormal = constant float 0xB6A0000000000000, align 4
@flt_neg_min_normal = constant float 0xB810000000000000, align 4
@flt_neg_max = constant float 0xC7EFFFFFE0000000, align 4
@flt_neg_infinity = constant float 0xFFF0000000000000, align 4
@dbl_nan = constant double 0x7FF8000000000000, align 8
@dbl_snan = constant double 0x7FF0000000000001, align 8
@dbl_pos_min_subnormal = constant double 4.940660e-324, align 8
@dbl_pos_min_normal = constant double 0x10000000000000, align 8
@dbl_pos_max = constant double 0x7FEFFFFFFFFFFFFF, align 8
@dbl_pos_infinity = constant double 0x7FF0000000000000, align 8
@dbl_neg_min_subnormal = constant double -4.940660e-324, align 8
@dbl_neg_min_normal = constant double 0x8010000000000000, align 8
@dbl_neg_max = constant double 0xFFEFFFFFFFFFFFFF, align 8
@dbl_neg_infinity = constant double 0xFFF0000000000000, align 8

define double @nextafter_up_direction() {
; CHECK-LABEL: define double @nextafter_up_direction() {
; CHECK-NEXT:    ret double f0x3FF0000000000001
;
  %next = call double @nextafter(double 1.0, double 2.0)
  ret double %next
}

define float @nextafterf_up_direction() {
; CHECK-LABEL: define float @nextafterf_up_direction() {
; CHECK-NEXT:    ret float f0x3F800001
;
  %next = call float @nextafterf(float 1.0, float 2.0)
  ret float %next
}

define double @nextafter_down_direction() {
; CHECK-LABEL: define double @nextafter_down_direction() {
; CHECK-NEXT:    ret double f0x3FEFFFFFFFFFFFFF
;
  %next = call double @nextafter(double 1.0, double 0.0)
  ret double %next
}

define float @nextafterf_down_direction() {
; CHECK-LABEL: define float @nextafterf_down_direction() {
; CHECK-NEXT:    ret float f0x3F7FFFFF
;
  %next = call float @nextafterf(float 1.0, float 0.0)
  ret float %next
}

define double @nextafter_equal_args() {
; CHECK-LABEL: define double @nextafter_equal_args() {
; CHECK-NEXT:    ret double 1.000000e+00
;
  %next = call double @nextafter(double 1.0, double 1.0)
  ret double %next
}

define float @nextafterf_equal_args() {
; CHECK-LABEL: define float @nextafterf_equal_args() {
; CHECK-NEXT:    ret float 1.000000e+00
;
  %next = call float @nextafterf(float 1.0, float 1.0)
  ret float %next
}

define double @nextafter_pos_zero_neg_zero() {
; CHECK-LABEL: define double @nextafter_pos_zero_neg_zero() {
; CHECK-NEXT:    ret double -0.000000e+00
;
  %next = call double @nextafter(double 0.0, double -0.0)
  ret double %next
}

define float @nextafterf_pos_zero_neg_zero() {
; CHECK-LABEL: define float @nextafterf_pos_zero_neg_zero() {
; CHECK-NEXT:    ret float -0.000000e+00
;
  %next = call float @nextafterf(float 0.0, float -0.0)
  ret float %next
}

define double @nextafter_neg_zero_pos_zero() {
; CHECK-LABEL: define double @nextafter_neg_zero_pos_zero() {
; CHECK-NEXT:    ret double 0.000000e+00
;
  %next = call double @nextafter(double -0.0, double 0.0)
  ret double %next
}

define float @nextafterf_neg_zero_pos_zero() {
; CHECK-LABEL: define float @nextafterf_neg_zero_pos_zero() {
; CHECK-NEXT:    ret float 0.000000e+00
;
  %next = call float @nextafterf(float -0.0, float 0.0)
  ret float %next
}

define double @nextafter_nan_with_payload() {
; CHECK-LABEL: define double @nextafter_nan_with_payload() {
; CHECK-NEXT:    ret double +nan(0x1)
;
  %tmp1 = load i64, ptr @dbl_nan
  %tmp2 = or i64 %tmp1, 1
  %nan_with_payload = bitcast i64 %tmp2 to double
  %next = call double @nextafter(double %nan_with_payload, double 1.0)
  ret double %next
}

define double @nextafter_nan_with_payload_2() {
; CHECK-LABEL: define double @nextafter_nan_with_payload_2() {
; CHECK-NEXT:    ret double +nan(0x1)
;
  %tmp1 = load i64, ptr @dbl_nan
  %tmp2 = or i64 %tmp1, 1
  %nan_with_payload = bitcast i64 %tmp2 to double
  %next = call double @nextafter(double 1.0, double %nan_with_payload)
  ret double %next
}

define double @nextafter_snan() {
; CHECK-LABEL: define double @nextafter_snan() {
; CHECK-NEXT:    ret double +qnan
;
  %arg1 = load double, ptr @dbl_snan
  %next = call double @nextafter(double %arg1, double 1.0)
  ret double %next
}

define double @nextafter_snan_2() {
; CHECK-LABEL: define double @nextafter_snan_2() {
; CHECK-NEXT:    [[NEXT:%.*]] = call double @nextafter(double 1.000000e+00, double +snan(0x1))
; CHECK-NEXT:    ret double [[NEXT]]
;
  %arg2 = load double, ptr @dbl_snan
  %next = call double @nextafter(double 1.0, double %arg2)
  ret double %next
}

define float @nextafterf_nan_with_payload() {
; CHECK-LABEL: define float @nextafterf_nan_with_payload() {
; CHECK-NEXT:    ret float +nan(0x1)
;
  %tmp1 = load i32, ptr @flt_nan
  %tmp2 = or i32 %tmp1, 1
  %nan_with_payload = bitcast i32 %tmp2 to float
  %next = call float @nextafterf(float %nan_with_payload, float 1.0)
  ret float %next
}

define double @nextafter_pos_overflow () {
; CHECK-LABEL: define double @nextafter_pos_overflow() {
; CHECK-NEXT:    ret double +inf
;
  %arg1 = load double, ptr @dbl_pos_max
  %arg2 = load double, ptr @dbl_pos_infinity
  %next = call double @nextafter(double %arg1, double %arg2)
  ret double %next
}

define float @nextafterf_pos_overflow() {
; CHECK-LABEL: define float @nextafterf_pos_overflow() {
; CHECK-NEXT:    ret float +inf
;
  %arg1 = load float, ptr @flt_pos_max
  %arg2 = load float, ptr @flt_pos_infinity
  %next = call float @nextafterf(float %arg1, float %arg2)
  ret float %next
}

define double @nextafter_neg_overflow() {
; CHECK-LABEL: define double @nextafter_neg_overflow() {
; CHECK-NEXT:    ret double -inf
;
  %arg1 = load double, ptr @dbl_neg_max
  %arg2 = load double, ptr @dbl_neg_infinity
  %next = call double @nextafter(double %arg1, double %arg2)
  ret double %next
}

define float @nextafterf_neg_overflow() {
; CHECK-LABEL: define float @nextafterf_neg_overflow() {
; CHECK-NEXT:    ret float -inf
;
  %arg1 = load float, ptr @flt_neg_max
  %arg2 = load float, ptr @flt_neg_infinity
  %next = call float @nextafterf(float %arg1, float %arg2)
  ret float %next
}

define double @nextafter_zero_from_above() {
; CHECK-LABEL: define double @nextafter_zero_from_above() {
; CHECK-NEXT:    [[NEXT:%.*]] = call double @nextafter(double 4.940660e-324, double 0.000000e+00)
; CHECK-NEXT:    ret double [[NEXT]]
;
  %arg = load double, ptr @dbl_pos_min_subnormal
  %next = call double @nextafter(double %arg, double 0.0)
  ret double %next
}

define float @nextafterf_zero_from_above() {
; CHECK-LABEL: define float @nextafterf_zero_from_above() {
; CHECK-NEXT:    [[NEXT:%.*]] = call float @nextafterf(float 1.401300e-45, float 0.000000e+00)
; CHECK-NEXT:    ret float [[NEXT]]
;
  %arg = load float, ptr @flt_pos_min_subnormal
  %next = call float @nextafterf(float %arg, float 0.0)
  ret float %next
}

define double @nextafter_zero_from_below() {
; CHECK-LABEL: define double @nextafter_zero_from_below() {
; CHECK-NEXT:    [[NEXT:%.*]] = call double @nextafter(double -4.940660e-324, double 0.000000e+00)
; CHECK-NEXT:    ret double [[NEXT]]
;
  %arg = load double, ptr @dbl_neg_min_subnormal
  %next = call double @nextafter(double %arg, double 0.0)
  ret double %next
}

define float @nextafterf_zero_from_below() {
; CHECK-LABEL: define float @nextafterf_zero_from_below() {
; CHECK-NEXT:    [[NEXT:%.*]] = call float @nextafterf(float -1.401300e-45, float 0.000000e+00)
; CHECK-NEXT:    ret float [[NEXT]]
;
  %arg = load float, ptr @flt_neg_min_subnormal
  %next = call float @nextafterf(float %arg, float 0.0)
  ret float %next
}

define double @nextafter_subnormal() {
; CHECK-LABEL: define double @nextafter_subnormal() {
; CHECK-NEXT:    [[NEXT:%.*]] = call double @nextafter(double 4.940660e-324, double +inf)
; CHECK-NEXT:    ret double [[NEXT]]
;
  %subnormal = load double, ptr @dbl_pos_min_subnormal
  %infinity = load double, ptr @dbl_pos_infinity
  %next = call double @nextafter(double %subnormal, double %infinity)
  ret double %next
}

define float @nextafterf_subnormal() {
; CHECK-LABEL: define float @nextafterf_subnormal() {
; CHECK-NEXT:    [[NEXT:%.*]] = call float @nextafterf(float 1.401300e-45, float +inf)
; CHECK-NEXT:    ret float [[NEXT]]
;
  %subnormal = load float, ptr @flt_pos_min_subnormal
  %infinity = load float, ptr @flt_pos_infinity
  %next = call float @nextafterf(float %subnormal, float %infinity)
  ret float %next
}

define double @nextafter_poison() {
; CHECK-LABEL: define double @nextafter_poison() {
; CHECK-NEXT:    [[NEXT:%.*]] = call double @nextafter(double poison, double 1.000000e+00)
; CHECK-NEXT:    ret double [[NEXT]]
;
  %next = call double @nextafter(double poison, double 1.0)
  ret double %next
}

define double @nextafterf_poison() {
; CHECK-LABEL: define double @nextafterf_poison() {
; CHECK-NEXT:    [[NEXT:%.*]] = call double @nextafterf(float poison, float 1.000000e+00)
; CHECK-NEXT:    ret double [[NEXT]]
;
  %next = call double @nextafterf(float poison, float 1.0)
  ret double %next
}

define double @nextafter_subnormal_readnone() {
; CHECK-LABEL: define double @nextafter_subnormal_readnone() {
; CHECK-NEXT:    [[NEXT:%.*]] = call double @nextafter(double 4.940660e-324, double +inf) #[[ATTR1:[0-9]+]]
; CHECK-NEXT:    ret double [[NEXT]]
;
  %subnormal = load double, ptr @dbl_pos_min_subnormal
  %infinity = load double, ptr @dbl_pos_infinity
  %next = call double @nextafter(double %subnormal, double %infinity) readnone
  ret double %next
}

define float @nextafterf_subnormal_readnone() {
; CHECK-LABEL: define float @nextafterf_subnormal_readnone() {
; CHECK-NEXT:    [[NEXT:%.*]] = call float @nextafterf(float 1.401300e-45, float +inf) #[[ATTR1]]
; CHECK-NEXT:    ret float [[NEXT]]
;
  %subnormal = load float, ptr @flt_pos_min_subnormal
  %infinity = load float, ptr @flt_pos_infinity
  %next = call float @nextafterf(float %subnormal, float %infinity) readnone
  ret float %next
}

declare double @nextafter(double, double) #0
declare float @nextafterf(float, float) #0
attributes #0 = { willreturn memory(errnomem: write) }