srem-seteq.ll
12.2 KB
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; 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
}