llvm/test/CodeGen/AArch64/ignore-signed-zero.ll

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

; Test that nsz constraint can be bypassed when all uses are sign-insensitive.

define i1 @test_fadd_neg_zero_fcmp(float %x) {
; CHECK-LABEL: test_fadd_neg_zero_fcmp:
; CHECK:       // %bb.0:
; CHECK-NEXT:    fmov s1, #1.00000000
; CHECK-NEXT:    fcmp s0, s1
; CHECK-NEXT:    cset w0, eq
; CHECK-NEXT:    ret
  %add = fadd float %x, -0.0
  %cmp = fcmp oeq float %add, 1.0
  ret i1 %cmp
}

define float @test_fsub_zero_fabs(float %x) {
; CHECK-LABEL: test_fsub_zero_fabs:
; CHECK:       // %bb.0:
; CHECK-NEXT:    fabs s0, s0
; CHECK-NEXT:    ret
  %sub = fsub float %x, 0.0
  %abs = call float @llvm.fabs.f32(float %sub)
  ret float %abs
}

define float @test_fsub_neg_zero_copysign(float %x, float %y) {
; CHECK-LABEL: test_fsub_neg_zero_copysign:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mvni v2.4s, #128, lsl #24
; CHECK-NEXT:    // kill: def $s0 killed $s0 def $q0
; CHECK-NEXT:    // kill: def $s1 killed $s1 def $q1
; CHECK-NEXT:    bif v0.16b, v1.16b, v2.16b
; CHECK-NEXT:    // kill: def $s0 killed $s0 killed $q0
; CHECK-NEXT:    ret
  %sub = fsub float -0.0, %x
  %copysign = call float @llvm.copysign.f32(float %sub, float %y)
  ret float %copysign
}

define i1 @test_div_sqrt_fcmp(float %x) {
; CHECK-LABEL: test_div_sqrt_fcmp:
; CHECK:       // %bb.0:
; CHECK-NEXT:    fsqrt s0, s0
; CHECK-NEXT:    fcmp s0, #0.0
; CHECK-NEXT:    cset w0, gt
; CHECK-NEXT:    ret
  %sqrt = call float @llvm.sqrt.f32(float %x)
  %div = fdiv reassoc float %x, %sqrt
  %cmp = fcmp ogt float %div, 0.0
  ret i1 %cmp
}

define float @test_frem_fabs(float %x) {
; CHECK-LABEL: test_frem_fabs:
; CHECK:       // %bb.0:
; CHECK-NEXT:    fmov s1, #0.50000000
; CHECK-NEXT:    fmov s2, #-2.00000000
; CHECK-NEXT:    fmul s1, s0, s1
; CHECK-NEXT:    frintz s1, s1
; CHECK-NEXT:    fmadd s0, s1, s2, s0
; CHECK-NEXT:    fabs s0, s0
; CHECK-NEXT:    ret
  %rem = frem float %x, 2.0
  %abs = call float @llvm.fabs.f32(float %rem)
  ret float %abs
}

declare float @llvm.fabs.f32(float)
declare float @llvm.copysign.f32(float, float)
declare float @llvm.sqrt.f32(float)