| ; 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 |
| } |