llvm/test/CodeGen/X86/mul-cmp.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-- -mattr=sse | FileCheck %s --check-prefixes=CHECK,SSE
; RUN: llc < %s -mtriple=x86_64-- -mattr=avx | FileCheck %s --check-prefixes=CHECK,AVX

; With no-wrap:
; (X * Y) == 0 --> (X == 0) || (Y == 0)
; (X * Y) != 0 --> (X != 0) && (Y != 0)

define i1 @mul_nsw_eq0_i8(i8 %x, i8 %y) {
; CHECK-LABEL: mul_nsw_eq0_i8:
; CHECK:       # %bb.0:
; CHECK-NEXT:    testb %sil, %sil
; CHECK-NEXT:    sete %cl
; CHECK-NEXT:    testb %dil, %dil
; CHECK-NEXT:    sete %al
; CHECK-NEXT:    orb %cl, %al
; CHECK-NEXT:    retq
  %m = mul nsw i8 %x, %y
  %r = icmp eq i8 %m, 0
  ret i1 %r
}

; negative test - not valid if mul can overflow

define i1 @mul_eq0_i8(i8 %x, i8 %y) {
; CHECK-LABEL: mul_eq0_i8:
; CHECK:       # %bb.0:
; CHECK-NEXT:    movl %edi, %eax
; CHECK-NEXT:    # kill: def $al killed $al killed $eax
; CHECK-NEXT:    mulb %sil
; CHECK-NEXT:    testb %al, %al
; CHECK-NEXT:    sete %al
; CHECK-NEXT:    retq
  %m = mul i8 %x, %y
  %r = icmp eq i8 %m, 0
  ret i1 %r
}

; negative test - don't try with minsize

define i1 @mul_nsw_eq0_i8_size(i8 %x, i8 %y) minsize {
; CHECK-LABEL: mul_nsw_eq0_i8_size:
; CHECK:       # %bb.0:
; CHECK-NEXT:    movl %edi, %eax
; CHECK-NEXT:    # kill: def $al killed $al killed $eax
; CHECK-NEXT:    mulb %sil
; CHECK-NEXT:    testb %al, %al
; CHECK-NEXT:    sete %al
; CHECK-NEXT:    retq
  %m = mul nsw i8 %x, %y
  %r = icmp eq i8 %m, 0
  ret i1 %r
}

define i1 @mul_nsw_ne0_i16(i16 %x, i16 %y) {
; CHECK-LABEL: mul_nsw_ne0_i16:
; CHECK:       # %bb.0:
; CHECK-NEXT:    testw %si, %si
; CHECK-NEXT:    setne %cl
; CHECK-NEXT:    testw %di, %di
; CHECK-NEXT:    setne %al
; CHECK-NEXT:    andb %cl, %al
; CHECK-NEXT:    retq
  %m = mul nsw i16 %x, %y
  %r = icmp ne i16 %m, 0
  ret i1 %r
}

define i1 @mul_nuw_eq0_i32(i32 %x, i32 %y) {
; CHECK-LABEL: mul_nuw_eq0_i32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    testl %esi, %esi
; CHECK-NEXT:    sete %cl
; CHECK-NEXT:    testl %edi, %edi
; CHECK-NEXT:    sete %al
; CHECK-NEXT:    orb %cl, %al
; CHECK-NEXT:    retq
  %m = mul nuw i32 %x, %y
  %r = icmp eq i32 %m, 0
  ret i1 %r
}

define i1 @mul_nsw_nuw_ne0_i64(i64 %x, i64 %y) {
; CHECK-LABEL: mul_nsw_nuw_ne0_i64:
; CHECK:       # %bb.0:
; CHECK-NEXT:    testq %rsi, %rsi
; CHECK-NEXT:    setne %cl
; CHECK-NEXT:    testq %rdi, %rdi
; CHECK-NEXT:    setne %al
; CHECK-NEXT:    andb %cl, %al
; CHECK-NEXT:    retq
  %m = mul nsw nuw i64 %x, %y
  %r = icmp ne i64 %m, 0
  ret i1 %r
}

define <16 x i1> @mul_nuw_eq0_v16i8(<16 x i8> %x, <16 x i8> %y) {
; SSE-LABEL: mul_nuw_eq0_v16i8:
; SSE:       # %bb.0:
; SSE-NEXT:    pxor %xmm2, %xmm2
; SSE-NEXT:    pcmpeqb %xmm2, %xmm1
; SSE-NEXT:    pcmpeqb %xmm2, %xmm0
; SSE-NEXT:    por %xmm1, %xmm0
; SSE-NEXT:    retq
;
; AVX-LABEL: mul_nuw_eq0_v16i8:
; AVX:       # %bb.0:
; AVX-NEXT:    vpxor %xmm2, %xmm2, %xmm2
; AVX-NEXT:    vpcmpeqb %xmm2, %xmm1, %xmm1
; AVX-NEXT:    vpcmpeqb %xmm2, %xmm0, %xmm0
; AVX-NEXT:    vpor %xmm1, %xmm0, %xmm0
; AVX-NEXT:    retq
  %m = mul nuw <16 x i8> %x, %y
  %r = icmp eq <16 x i8> %m, zeroinitializer
  ret <16 x i1> %r
}

define <4 x i1> @mul_nsw_ne0_v4i32(<4 x i32> %x, <4 x i32> %y) {
; SSE-LABEL: mul_nsw_ne0_v4i32:
; SSE:       # %bb.0:
; SSE-NEXT:    pxor %xmm2, %xmm2
; SSE-NEXT:    pcmpeqd %xmm2, %xmm1
; SSE-NEXT:    pcmpeqd %xmm2, %xmm0
; SSE-NEXT:    por %xmm1, %xmm0
; SSE-NEXT:    pcmpeqd %xmm1, %xmm1
; SSE-NEXT:    pxor %xmm1, %xmm0
; SSE-NEXT:    retq
;
; AVX-LABEL: mul_nsw_ne0_v4i32:
; AVX:       # %bb.0:
; AVX-NEXT:    vpxor %xmm2, %xmm2, %xmm2
; AVX-NEXT:    vpcmpeqd %xmm2, %xmm1, %xmm1
; AVX-NEXT:    vpcmpeqd %xmm2, %xmm0, %xmm0
; AVX-NEXT:    vpor %xmm1, %xmm0, %xmm0
; AVX-NEXT:    vpcmpeqd %xmm1, %xmm1, %xmm1
; AVX-NEXT:    vpxor %xmm1, %xmm0, %xmm0
; AVX-NEXT:    retq
  %m = mul nsw <4 x i32> %x, %y
  %r = icmp ne <4 x i32> %m, zeroinitializer
  ret <4 x i1> %r
}

; negative test - don't try with minsize
; TODO: SSE would be much smaller if decomposed.

define <4 x i1> @mul_nsw_ne0_v4i32_size(<4 x i32> %x, <4 x i32> %y) minsize {
; SSE-LABEL: mul_nsw_ne0_v4i32_size:
; SSE:       # %bb.0:
; SSE-NEXT:    pshufd {{.*#+}} xmm2 = xmm0[1,1,3,3]
; SSE-NEXT:    pmuludq %xmm1, %xmm0
; SSE-NEXT:    pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
; SSE-NEXT:    pshufd {{.*#+}} xmm1 = xmm1[1,1,3,3]
; SSE-NEXT:    pmuludq %xmm2, %xmm1
; SSE-NEXT:    pshufd {{.*#+}} xmm1 = xmm1[0,2,2,3]
; SSE-NEXT:    punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
; SSE-NEXT:    pxor %xmm1, %xmm1
; SSE-NEXT:    pcmpeqd %xmm0, %xmm1
; SSE-NEXT:    pcmpeqd %xmm0, %xmm0
; SSE-NEXT:    pxor %xmm1, %xmm0
; SSE-NEXT:    retq
;
; AVX-LABEL: mul_nsw_ne0_v4i32_size:
; AVX:       # %bb.0:
; AVX-NEXT:    vpmulld %xmm1, %xmm0, %xmm0
; AVX-NEXT:    vpxor %xmm1, %xmm1, %xmm1
; AVX-NEXT:    vpcmpeqd %xmm1, %xmm0, %xmm0
; AVX-NEXT:    vpcmpeqd %xmm1, %xmm1, %xmm1
; AVX-NEXT:    vpxor %xmm1, %xmm0, %xmm0
; AVX-NEXT:    retq
  %m = mul nsw <4 x i32> %x, %y
  %r = icmp ne <4 x i32> %m, zeroinitializer
  ret <4 x i1> %r
}