llvm-project/llvm/test/CodeGen/AArch64/fp-const-fold.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=aarch64-- | FileCheck %s

; https://bugs.llvm.org/show_bug.cgi?id=41668

define double @constant_fold_fdiv_by_zero(double* %p) {
; CHECK-LABEL: constant_fold_fdiv_by_zero:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9218868437227405312
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r = fdiv double 4.940660e-324, 0.0
  ret double %r
}

; frem by 0.0 --> NaN

define double @constant_fold_frem_by_zero(double* %p) {
; CHECK-LABEL: constant_fold_frem_by_zero:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r = frem double 4.940660e-324, 0.0
  ret double %r
}

; Inf * 0.0 --> NaN

define double @constant_fold_fmul_nan(double* %p) {
; CHECK-LABEL: constant_fold_fmul_nan:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r = fmul double 0x7ff0000000000000, 0.0
  ret double %r
}

; Inf + -Inf --> NaN

define double @constant_fold_fadd_nan(double* %p) {
; CHECK-LABEL: constant_fold_fadd_nan:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r = fadd double 0x7ff0000000000000, 0xfff0000000000000
  ret double %r
}

; Inf - Inf --> NaN

define double @constant_fold_fsub_nan(double* %p) {
; CHECK-LABEL: constant_fold_fsub_nan:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r = fsub double 0x7ff0000000000000, 0x7ff0000000000000
  ret double %r
}

; Inf * 0.0 + ? --> NaN

define double @constant_fold_fma_nan(double* %p) {
; CHECK-LABEL: constant_fold_fma_nan:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r =  call double @llvm.fma.f64(double 0x7ff0000000000000, double 0.0, double 42.0)
  ret double %r
}

define double @fdiv_nnan_nan_op0(double %x) {
; CHECK-LABEL: fdiv_nnan_nan_op0:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ret
  %r = fdiv nnan double 0xfff8000000000000, %x
  ret double %r
}

define double @fmul_nnan_nan_op1(double %x) {
; CHECK-LABEL: fmul_nnan_nan_op1:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ret
  %r = fmul nnan double %x, 0x7ff8000000000000
  ret double %r
}

; Negative test - nan is ok.
; TODO: Should simplify to nan.

define double @fdiv_ninf_nan_op0(double %x) {
; CHECK-LABEL: fdiv_ninf_nan_op0:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #-2251799813685248
; CHECK-NEXT:    fmov d1, x8
; CHECK-NEXT:    fdiv d0, d1, d0
; CHECK-NEXT:    ret
  %r = fdiv ninf double 0xfff8000000000000, %x
  ret double %r
}

; Negative test - nan is ok.
; TODO: Should simplify to nan.

define double @fadd_ninf_nan_op1(double %x) {
; CHECK-LABEL: fadd_ninf_nan_op1:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d1, x8
; CHECK-NEXT:    fadd d0, d0, d1
; CHECK-NEXT:    ret
  %r = fadd ninf double %x, 0x7ff8000000000000
  ret double %r
}

define double @fdiv_ninf_inf_op0(double %x) {
; CHECK-LABEL: fdiv_ninf_inf_op0:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ret
  %r = fdiv ninf double 0x7ff0000000000000, %x
  ret double %r
}

define double @fadd_ninf_inf_op1(double %x) {
; CHECK-LABEL: fadd_ninf_inf_op1:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ret
  %r = fadd ninf double %x, 0xfff0000000000000
  ret double %r
}

; Negative test - inf is ok.
; TODO: Should simplify to inf.

define double @fsub_nnan_inf_op0(double %x) {
; CHECK-LABEL: fsub_nnan_inf_op0:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9218868437227405312
; CHECK-NEXT:    fmov d1, x8
; CHECK-NEXT:    fsub d0, d1, d0
; CHECK-NEXT:    ret
  %r = fsub nnan double 0x7ff0000000000000, %x
  ret double %r
}

; Negative test - inf is ok.
; TODO: Should simplify to -inf.

define double @fmul_nnan_inf_op1(double %x) {
; CHECK-LABEL: fmul_nnan_inf_op1:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #-4503599627370496
; CHECK-NEXT:    fmov d1, x8
; CHECK-NEXT:    fmul d0, d0, d1
; CHECK-NEXT:    ret
  %r = fmul nnan double %x, 0xfff0000000000000
  ret double %r
}

; TODO: Should simplify to undef

define double @fdiv_nnan_undef_op0(double %x) {
; CHECK-LABEL: fdiv_nnan_undef_op0:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r = fdiv nnan double undef, %x
  ret double %r
}

; TODO: Should simplify to undef

define double @fdiv_nnan_undef_op1(double %x) {
; CHECK-LABEL: fdiv_nnan_undef_op1:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r = fdiv nnan double %x, undef
  ret double %r
}

; TODO: Should simplify to undef

define double @fdiv_ninf_undef_op0(double %x) {
; CHECK-LABEL: fdiv_ninf_undef_op0:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r = fdiv ninf double undef, %x
  ret double %r
}

; TODO: Should simplify to undef

define double @fdiv_ninf_undef_op1(double %x) {
; CHECK-LABEL: fdiv_ninf_undef_op1:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9221120237041090560
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %r = fdiv ninf double %x, undef
  ret double %r
}

declare double @llvm.fma.f64(double, double, double)