llvm/test/CodeGen/X86/arithmetic_fence.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+fma | FileCheck %s --check-prefix=X86
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+fma | FileCheck %s --check-prefix=X64

define float @f1(float %a, float %b, float %c) {
; X86-LABEL: f1:
; X86:       # %bb.0:
; X86-NEXT:    pushl %eax
; X86-NEXT:    .cfi_def_cfa_offset 8
; X86-NEXT:    vmovss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X86-NEXT:    vmovss {{.*#+}} xmm1 = mem[0],zero,zero,zero
; X86-NEXT:    vfmadd213ss {{.*#+}} xmm1 = (xmm0 * xmm1) + mem
; X86-NEXT:    vmovss %xmm1, (%esp)
; X86-NEXT:    flds (%esp)
; X86-NEXT:    popl %eax
; X86-NEXT:    .cfi_def_cfa_offset 4
; X86-NEXT:    retl
;
; X64-LABEL: f1:
; X64:       # %bb.0:
; X64-NEXT:    vfmadd213ss {{.*#+}} xmm0 = (xmm1 * xmm0) + xmm2
; X64-NEXT:    retq
  %mul = fmul fast float %b, %a
  %add = fadd fast float %mul, %c
  ret float %add
}

define float @f2(float %a, float %b, float %c) {
; X86-LABEL: f2:
; X86:       # %bb.0:
; X86-NEXT:    pushl %eax
; X86-NEXT:    .cfi_def_cfa_offset 8
; X86-NEXT:    vmovss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X86-NEXT:    vmulss {{[0-9]+}}(%esp), %xmm0, %xmm0
; X86-NEXT:    #ARITH_FENCE
; X86-NEXT:    vaddss {{[0-9]+}}(%esp), %xmm0, %xmm0
; X86-NEXT:    vmovss %xmm0, (%esp)
; X86-NEXT:    flds (%esp)
; X86-NEXT:    popl %eax
; X86-NEXT:    .cfi_def_cfa_offset 4
; X86-NEXT:    retl
;
; X64-LABEL: f2:
; X64:       # %bb.0:
; X64-NEXT:    vmulss %xmm0, %xmm1, %xmm0
; X64-NEXT:    #ARITH_FENCE
; X64-NEXT:    vaddss %xmm2, %xmm0, %xmm0
; X64-NEXT:    retq
  %mul = fmul fast float %b, %a
  %tmp = call float @llvm.arithmetic.fence.f32(float %mul)
  %add = fadd fast float %tmp, %c
  ret float %add
}

define double @f3(double %a) {
; X86-LABEL: f3:
; X86:       # %bb.0:
; X86-NEXT:    pushl %ebp
; X86-NEXT:    .cfi_def_cfa_offset 8
; X86-NEXT:    .cfi_offset %ebp, -8
; X86-NEXT:    movl %esp, %ebp
; X86-NEXT:    .cfi_def_cfa_register %ebp
; X86-NEXT:    andl $-8, %esp
; X86-NEXT:    subl $8, %esp
; X86-NEXT:    vmovsd {{.*#+}} xmm0 = mem[0],zero
; X86-NEXT:    vmulsd {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0, %xmm0
; X86-NEXT:    vmovsd %xmm0, (%esp)
; X86-NEXT:    fldl (%esp)
; X86-NEXT:    movl %ebp, %esp
; X86-NEXT:    popl %ebp
; X86-NEXT:    .cfi_def_cfa %esp, 4
; X86-NEXT:    retl
;
; X64-LABEL: f3:
; X64:       # %bb.0:
; X64-NEXT:    vmulsd {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
; X64-NEXT:    retq
  %1 = fadd fast double %a, %a
  %2 = fadd fast double %a, %a
  %3 = fadd fast double %1, %2
  ret double %3
}

define double @f4(double %a) {
; X86-LABEL: f4:
; X86:       # %bb.0:
; X86-NEXT:    pushl %ebp
; X86-NEXT:    .cfi_def_cfa_offset 8
; X86-NEXT:    .cfi_offset %ebp, -8
; X86-NEXT:    movl %esp, %ebp
; X86-NEXT:    .cfi_def_cfa_register %ebp
; X86-NEXT:    andl $-8, %esp
; X86-NEXT:    subl $8, %esp
; X86-NEXT:    vmovsd {{.*#+}} xmm0 = mem[0],zero
; X86-NEXT:    vaddsd %xmm0, %xmm0, %xmm0
; X86-NEXT:    vmovapd %xmm0, %xmm1
; X86-NEXT:    #ARITH_FENCE
; X86-NEXT:    vaddsd %xmm0, %xmm1, %xmm0
; X86-NEXT:    vmovsd %xmm0, (%esp)
; X86-NEXT:    fldl (%esp)
; X86-NEXT:    movl %ebp, %esp
; X86-NEXT:    popl %ebp
; X86-NEXT:    .cfi_def_cfa %esp, 4
; X86-NEXT:    retl
;
; X64-LABEL: f4:
; X64:       # %bb.0:
; X64-NEXT:    vaddsd %xmm0, %xmm0, %xmm0
; X64-NEXT:    vmovapd %xmm0, %xmm1
; X64-NEXT:    #ARITH_FENCE
; X64-NEXT:    vaddsd %xmm0, %xmm1, %xmm0
; X64-NEXT:    retq
  %1 = fadd fast double %a, %a
  %t = call double @llvm.arithmetic.fence.f64(double %1)
  %2 = fadd fast double %a, %a
  %3 = fadd fast double %t, %2
  ret double %3
}

define <2 x float> @f5(<2 x float> %a) {
; X86-LABEL: f5:
; X86:       # %bb.0:
; X86-NEXT:    vmulps {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0, %xmm0
; X86-NEXT:    retl
;
; X64-LABEL: f5:
; X64:       # %bb.0:
; X64-NEXT:    vmulps {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
; X64-NEXT:    retq
  %1 = fadd fast <2 x float> %a, %a
  %2 = fadd fast <2 x float> %a, %a
  %3 = fadd fast <2 x float> %1, %2
  ret <2 x float> %3
}

define <2 x float> @f6(<2 x float> %a) {
; X86-LABEL: f6:
; X86:       # %bb.0:
; X86-NEXT:    vaddps %xmm0, %xmm0, %xmm0
; X86-NEXT:    vmovaps %xmm0, %xmm1
; X86-NEXT:    #ARITH_FENCE
; X86-NEXT:    vaddps %xmm0, %xmm1, %xmm0
; X86-NEXT:    retl
;
; X64-LABEL: f6:
; X64:       # %bb.0:
; X64-NEXT:    vaddps %xmm0, %xmm0, %xmm0
; X64-NEXT:    vmovaps %xmm0, %xmm1
; X64-NEXT:    #ARITH_FENCE
; X64-NEXT:    vaddps %xmm0, %xmm1, %xmm0
; X64-NEXT:    retq
  %1 = fadd fast <2 x float> %a, %a
  %t = call <2 x float> @llvm.arithmetic.fence.v2f32(<2 x float> %1)
  %2 = fadd fast <2 x float> %a, %a
  %3 = fadd fast <2 x float> %t, %2
  ret <2 x float> %3
}

; This @f7 IR test can be generated from flowing c test:
;
; typedef __float128 TYPE;
; TYPE foo(TYPE *qr) {
;   TYPE re =__arithmetic_fence(*qr);
;   return re;
;}
;
; with flowing build command:
; clang -cc1  -triple i386-pc-linux-gnu -mreassociate  t.c -emit-llvm -O2

define dso_local fp128 @foo(fp128* nocapture readonly %qr) local_unnamed_addr{
; X86-LABEL: foo:
; X86:       # %bb.0: # %entry
; X86-NEXT:    pushl %edi
; X86-NEXT:    .cfi_def_cfa_offset 8
; X86-NEXT:    pushl %esi
; X86-NEXT:    .cfi_def_cfa_offset 12
; X86-NEXT:    .cfi_offset %esi, -12
; X86-NEXT:    .cfi_offset %edi, -8
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT:    movl 12(%ecx), %edx
; X86-NEXT:    movl 8(%ecx), %esi
; X86-NEXT:    movl (%ecx), %edi
; X86-NEXT:    movl 4(%ecx), %ecx
; X86-NEXT:    #ARITH_FENCE
; X86-NEXT:    #ARITH_FENCE
; X86-NEXT:    #ARITH_FENCE
; X86-NEXT:    #ARITH_FENCE
; X86-NEXT:    movl %edx, 12(%eax)
; X86-NEXT:    movl %esi, 8(%eax)
; X86-NEXT:    movl %ecx, 4(%eax)
; X86-NEXT:    movl %edi, (%eax)
; X86-NEXT:    popl %esi
; X86-NEXT:    .cfi_def_cfa_offset 8
; X86-NEXT:    popl %edi
; X86-NEXT:    .cfi_def_cfa_offset 4
; X86-NEXT:    retl $4
;
; X64-LABEL: foo:
; X64:       # %bb.0: # %entry
; X64-NEXT:    vmovaps (%rdi), %xmm0
; X64-NEXT:    #ARITH_FENCE
; X64-NEXT:    retq
entry:
  %0 = load fp128, fp128* %qr, align 16
  %1 = tail call reassoc fp128 @llvm.arithmetic.fence.f128(fp128 %0)
  ret fp128 %1
}

declare fp128 @llvm.arithmetic.fence.f128(fp128)
declare float @llvm.arithmetic.fence.f32(float)
declare double @llvm.arithmetic.fence.f64(double)
declare <2 x float> @llvm.arithmetic.fence.v2f32(<2 x float>)