test/CodeGen/X86/srem-seteq.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=+cmov < %s | FileCheck %s --check-prefixes=CHECK,X86
; RUN: llc -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s --check-prefixes=CHECK,X64

;------------------------------------------------------------------------------;
; Odd divisors
;------------------------------------------------------------------------------;

define i32 @test_srem_odd(i32 %X) nounwind {
; X86-LABEL: test_srem_odd:
; X86:       # %bb.0:
; X86-NEXT:    imull $-858993459, {{[0-9]+}}(%esp), %ecx # imm = 0xCCCCCCCD
; X86-NEXT:    addl $429496729, %ecx # imm = 0x19999999
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    setb %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_odd:
; X64:       # %bb.0:
; X64-NEXT:    imull $-858993459, %edi, %ecx # imm = 0xCCCCCCCD
; X64-NEXT:    addl $429496729, %ecx # imm = 0x19999999
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $858993459, %ecx # imm = 0x33333333
; X64-NEXT:    setb %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 5
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

define i32 @test_srem_odd_25(i32 %X) nounwind {
; X86-LABEL: test_srem_odd_25:
; X86:       # %bb.0:
; X86-NEXT:    imull $-1030792151, {{[0-9]+}}(%esp), %ecx # imm = 0xC28F5C29
; X86-NEXT:    addl $85899345, %ecx # imm = 0x51EB851
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $171798691, %ecx # imm = 0xA3D70A3
; X86-NEXT:    setb %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_odd_25:
; X64:       # %bb.0:
; X64-NEXT:    imull $-1030792151, %edi, %ecx # imm = 0xC28F5C29
; X64-NEXT:    addl $85899345, %ecx # imm = 0x51EB851
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $171798691, %ecx # imm = 0xA3D70A3
; X64-NEXT:    setb %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 25
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

; This is like test_srem_odd, except the divisor has bit 30 set.
define i32 @test_srem_odd_bit30(i32 %X) nounwind {
; X86-LABEL: test_srem_odd_bit30:
; X86:       # %bb.0:
; X86-NEXT:    imull $1789569707, {{[0-9]+}}(%esp), %ecx # imm = 0x6AAAAAAB
; X86-NEXT:    incl %ecx
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $3, %ecx
; X86-NEXT:    setb %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_odd_bit30:
; X64:       # %bb.0:
; X64-NEXT:    imull $1789569707, %edi, %ecx # imm = 0x6AAAAAAB
; X64-NEXT:    incl %ecx
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $3, %ecx
; X64-NEXT:    setb %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 1073741827
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

; This is like test_srem_odd, except the divisor has bit 31 set.
define i32 @test_srem_odd_bit31(i32 %X) nounwind {
; X86-LABEL: test_srem_odd_bit31:
; X86:       # %bb.0:
; X86-NEXT:    imull $-715827883, {{[0-9]+}}(%esp), %ecx # imm = 0xD5555555
; X86-NEXT:    incl %ecx
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $3, %ecx
; X86-NEXT:    setb %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_odd_bit31:
; X64:       # %bb.0:
; X64-NEXT:    imull $-715827883, %edi, %ecx # imm = 0xD5555555
; X64-NEXT:    incl %ecx
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $3, %ecx
; X64-NEXT:    setb %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 2147483651
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

;------------------------------------------------------------------------------;
; Even divisors
;------------------------------------------------------------------------------;

define i16 @test_srem_even(i16 %X) nounwind {
; X86-LABEL: test_srem_even:
; X86:       # %bb.0:
; X86-NEXT:    imull $28087, {{[0-9]+}}(%esp), %eax # imm = 0x6DB7
; X86-NEXT:    addl $4680, %eax # imm = 0x1248
; X86-NEXT:    rorw %ax
; X86-NEXT:    movzwl %ax, %ecx
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $4680, %ecx # imm = 0x1248
; X86-NEXT:    seta %al
; X86-NEXT:    # kill: def $ax killed $ax killed $eax
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_even:
; X64:       # %bb.0:
; X64-NEXT:    imull $28087, %edi, %eax # imm = 0x6DB7
; X64-NEXT:    addl $4680, %eax # imm = 0x1248
; X64-NEXT:    rorw %ax
; X64-NEXT:    movzwl %ax, %ecx
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $4680, %ecx # imm = 0x1248
; X64-NEXT:    seta %al
; X64-NEXT:    # kill: def $ax killed $ax killed $eax
; X64-NEXT:    retq
  %srem = srem i16 %X, 14
  %cmp = icmp ne i16 %srem, 0
  %ret = zext i1 %cmp to i16
  ret i16 %ret
}

define i32 @test_srem_even_100(i32 %X) nounwind {
; X86-LABEL: test_srem_even_100:
; X86:       # %bb.0:
; X86-NEXT:    imull $-1030792151, {{[0-9]+}}(%esp), %ecx # imm = 0xC28F5C29
; X86-NEXT:    addl $85899344, %ecx # imm = 0x51EB850
; X86-NEXT:    rorl $2, %ecx
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $42949673, %ecx # imm = 0x28F5C29
; X86-NEXT:    setb %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_even_100:
; X64:       # %bb.0:
; X64-NEXT:    imull $-1030792151, %edi, %ecx # imm = 0xC28F5C29
; X64-NEXT:    addl $85899344, %ecx # imm = 0x51EB850
; X64-NEXT:    rorl $2, %ecx
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $42949673, %ecx # imm = 0x28F5C29
; X64-NEXT:    setb %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 100
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

; This is like test_srem_even, except the divisor has bit 30 set.
define i32 @test_srem_even_bit30(i32 %X) nounwind {
; X86-LABEL: test_srem_even_bit30:
; X86:       # %bb.0:
; X86-NEXT:    imull $-51622203, {{[0-9]+}}(%esp), %ecx # imm = 0xFCEC4EC5
; X86-NEXT:    addl $8, %ecx
; X86-NEXT:    rorl $3, %ecx
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $3, %ecx
; X86-NEXT:    setb %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_even_bit30:
; X64:       # %bb.0:
; X64-NEXT:    imull $-51622203, %edi, %ecx # imm = 0xFCEC4EC5
; X64-NEXT:    addl $8, %ecx
; X64-NEXT:    rorl $3, %ecx
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $3, %ecx
; X64-NEXT:    setb %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 1073741928
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

; This is like test_srem_odd, except the divisor has bit 31 set.
define i32 @test_srem_even_bit31(i32 %X) nounwind {
; X86-LABEL: test_srem_even_bit31:
; X86:       # %bb.0:
; X86-NEXT:    imull $-989526779, {{[0-9]+}}(%esp), %ecx # imm = 0xC5050505
; X86-NEXT:    addl $2, %ecx
; X86-NEXT:    rorl %ecx
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $3, %ecx
; X86-NEXT:    setb %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_even_bit31:
; X64:       # %bb.0:
; X64-NEXT:    imull $-989526779, %edi, %ecx # imm = 0xC5050505
; X64-NEXT:    addl $2, %ecx
; X64-NEXT:    rorl %ecx
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $3, %ecx
; X64-NEXT:    setb %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 2147483750
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

;------------------------------------------------------------------------------;
; Special case
;------------------------------------------------------------------------------;

; 'NE' predicate is fine too.
define i32 @test_srem_odd_setne(i32 %X) nounwind {
; X86-LABEL: test_srem_odd_setne:
; X86:       # %bb.0:
; X86-NEXT:    imull $-858993459, {{[0-9]+}}(%esp), %ecx # imm = 0xCCCCCCCD
; X86-NEXT:    addl $429496729, %ecx # imm = 0x19999999
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $858993458, %ecx # imm = 0x33333332
; X86-NEXT:    seta %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_odd_setne:
; X64:       # %bb.0:
; X64-NEXT:    imull $-858993459, %edi, %ecx # imm = 0xCCCCCCCD
; X64-NEXT:    addl $429496729, %ecx # imm = 0x19999999
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $858993458, %ecx # imm = 0x33333332
; X64-NEXT:    seta %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 5
  %cmp = icmp ne i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

; The fold is only valid for positive divisors, negative-ones should be negated.
define i32 @test_srem_negative_odd(i32 %X) nounwind {
; X86-LABEL: test_srem_negative_odd:
; X86:       # %bb.0:
; X86-NEXT:    imull $-858993459, {{[0-9]+}}(%esp), %ecx # imm = 0xCCCCCCCD
; X86-NEXT:    addl $429496729, %ecx # imm = 0x19999999
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $858993458, %ecx # imm = 0x33333332
; X86-NEXT:    seta %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_negative_odd:
; X64:       # %bb.0:
; X64-NEXT:    imull $-858993459, %edi, %ecx # imm = 0xCCCCCCCD
; X64-NEXT:    addl $429496729, %ecx # imm = 0x19999999
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $858993458, %ecx # imm = 0x33333332
; X64-NEXT:    seta %al
; X64-NEXT:    retq
  %srem = srem i32 %X, -5
  %cmp = icmp ne i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}
define i32 @test_srem_negative_even(i32 %X) nounwind {
; X86-LABEL: test_srem_negative_even:
; X86:       # %bb.0:
; X86-NEXT:    imull $-1227133513, {{[0-9]+}}(%esp), %ecx # imm = 0xB6DB6DB7
; X86-NEXT:    addl $306783378, %ecx # imm = 0x12492492
; X86-NEXT:    rorl %ecx
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl $306783378, %ecx # imm = 0x12492492
; X86-NEXT:    seta %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_negative_even:
; X64:       # %bb.0:
; X64-NEXT:    imull $-1227133513, %edi, %ecx # imm = 0xB6DB6DB7
; X64-NEXT:    addl $306783378, %ecx # imm = 0x12492492
; X64-NEXT:    rorl %ecx
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl $306783378, %ecx # imm = 0x12492492
; X64-NEXT:    seta %al
; X64-NEXT:    retq
  %srem = srem i32 %X, -14
  %cmp = icmp ne i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

;------------------------------------------------------------------------------;
; Negative tests
;------------------------------------------------------------------------------;

; We can lower remainder of division by one much better elsewhere.
define i32 @test_srem_one(i32 %X) nounwind {
; CHECK-LABEL: test_srem_one:
; CHECK:       # %bb.0:
; CHECK-NEXT:    movl $1, %eax
; CHECK-NEXT:    ret{{[l|q]}}
  %srem = srem i32 %X, 1
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

; We can lower remainder of division by powers of two much better elsewhere.
define i32 @test_srem_pow2(i32 %X) nounwind {
; X86-LABEL: test_srem_pow2:
; X86:       # %bb.0:
; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT:    leal 15(%ecx), %edx
; X86-NEXT:    testl %ecx, %ecx
; X86-NEXT:    cmovnsl %ecx, %edx
; X86-NEXT:    andl $-16, %edx
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    cmpl %edx, %ecx
; X86-NEXT:    sete %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_pow2:
; X64:       # %bb.0:
; X64-NEXT:    # kill: def $edi killed $edi def $rdi
; X64-NEXT:    leal 15(%rdi), %ecx
; X64-NEXT:    testl %edi, %edi
; X64-NEXT:    cmovnsl %edi, %ecx
; X64-NEXT:    andl $-16, %ecx
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    cmpl %ecx, %edi
; X64-NEXT:    sete %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 16
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

; The fold is only valid for positive divisors, and we can't negate INT_MIN.
define i32 @test_srem_int_min(i32 %X) nounwind {
; X86-LABEL: test_srem_int_min:
; X86:       # %bb.0:
; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT:    leal 2147483647(%ecx), %edx
; X86-NEXT:    testl %ecx, %ecx
; X86-NEXT:    cmovnsl %ecx, %edx
; X86-NEXT:    andl $-2147483648, %edx # imm = 0x80000000
; X86-NEXT:    xorl %eax, %eax
; X86-NEXT:    addl %ecx, %edx
; X86-NEXT:    sete %al
; X86-NEXT:    retl
;
; X64-LABEL: test_srem_int_min:
; X64:       # %bb.0:
; X64-NEXT:    # kill: def $edi killed $edi def $rdi
; X64-NEXT:    leal 2147483647(%rdi), %ecx
; X64-NEXT:    testl %edi, %edi
; X64-NEXT:    cmovnsl %edi, %ecx
; X64-NEXT:    andl $-2147483648, %ecx # imm = 0x80000000
; X64-NEXT:    xorl %eax, %eax
; X64-NEXT:    addl %edi, %ecx
; X64-NEXT:    sete %al
; X64-NEXT:    retq
  %srem = srem i32 %X, 2147483648
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}

; We can lower remainder of division by all-ones much better elsewhere.
define i32 @test_srem_allones(i32 %X) nounwind {
; CHECK-LABEL: test_srem_allones:
; CHECK:       # %bb.0:
; CHECK-NEXT:    movl $1, %eax
; CHECK-NEXT:    ret{{[l|q]}}
  %srem = srem i32 %X, 4294967295
  %cmp = icmp eq i32 %srem, 0
  %ret = zext i1 %cmp to i32
  ret i32 %ret
}