| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=CHECK |
| |
| define i32 @fold_srem_positive_odd(i32 %x) { |
| ; CHECK-LABEL: fold_srem_positive_odd: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movslq %edi, %rax |
| ; CHECK-NEXT: imulq $-1401515643, %rax, %rcx # imm = 0xAC769185 |
| ; CHECK-NEXT: shrq $32, %rcx |
| ; CHECK-NEXT: addl %eax, %ecx |
| ; CHECK-NEXT: movl %ecx, %edx |
| ; CHECK-NEXT: shrl $31, %edx |
| ; CHECK-NEXT: sarl $6, %ecx |
| ; CHECK-NEXT: addl %edx, %ecx |
| ; CHECK-NEXT: imull $95, %ecx, %ecx |
| ; CHECK-NEXT: subl %ecx, %eax |
| ; CHECK-NEXT: # kill: def $eax killed $eax killed $rax |
| ; CHECK-NEXT: retq |
| %1 = srem i32 %x, 95 |
| ret i32 %1 |
| } |
| |
| |
| define i32 @fold_srem_positive_even(i32 %x) { |
| ; CHECK-LABEL: fold_srem_positive_even: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movslq %edi, %rax |
| ; CHECK-NEXT: imulq $1037275121, %rax, %rcx # imm = 0x3DD38FF1 |
| ; CHECK-NEXT: movq %rcx, %rdx |
| ; CHECK-NEXT: shrq $63, %rdx |
| ; CHECK-NEXT: sarq $40, %rcx |
| ; CHECK-NEXT: addl %edx, %ecx |
| ; CHECK-NEXT: imull $1060, %ecx, %ecx # imm = 0x424 |
| ; CHECK-NEXT: subl %ecx, %eax |
| ; CHECK-NEXT: # kill: def $eax killed $eax killed $rax |
| ; CHECK-NEXT: retq |
| %1 = srem i32 %x, 1060 |
| ret i32 %1 |
| } |
| |
| |
| define i32 @fold_srem_negative_odd(i32 %x) { |
| ; CHECK-LABEL: fold_srem_negative_odd: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movslq %edi, %rax |
| ; CHECK-NEXT: imulq $-1520762971, %rax, %rcx # imm = 0xA55AFFA5 |
| ; CHECK-NEXT: movq %rcx, %rdx |
| ; CHECK-NEXT: shrq $63, %rdx |
| ; CHECK-NEXT: sarq $40, %rcx |
| ; CHECK-NEXT: addl %edx, %ecx |
| ; CHECK-NEXT: imull $-723, %ecx, %ecx # imm = 0xFD2D |
| ; CHECK-NEXT: subl %ecx, %eax |
| ; CHECK-NEXT: # kill: def $eax killed $eax killed $rax |
| ; CHECK-NEXT: retq |
| %1 = srem i32 %x, -723 |
| ret i32 %1 |
| } |
| |
| |
| define i32 @fold_srem_negative_even(i32 %x) { |
| ; CHECK-LABEL: fold_srem_negative_even: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movslq %edi, %rax |
| ; CHECK-NEXT: imulq $-47844377, %rax, %rcx # imm = 0xFD25F3E7 |
| ; CHECK-NEXT: movq %rcx, %rdx |
| ; CHECK-NEXT: shrq $63, %rdx |
| ; CHECK-NEXT: sarq $40, %rcx |
| ; CHECK-NEXT: addl %edx, %ecx |
| ; CHECK-NEXT: imull $-22981, %ecx, %ecx # imm = 0xA63B |
| ; CHECK-NEXT: subl %ecx, %eax |
| ; CHECK-NEXT: # kill: def $eax killed $eax killed $rax |
| ; CHECK-NEXT: retq |
| %1 = srem i32 %x, -22981 |
| ret i32 %1 |
| } |
| |
| |
| ; Don't fold if we can combine srem with sdiv. |
| define i32 @combine_srem_sdiv(i32 %x) { |
| ; CHECK-LABEL: combine_srem_sdiv: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movslq %edi, %rax |
| ; CHECK-NEXT: imulq $-1401515643, %rax, %rcx # imm = 0xAC769185 |
| ; CHECK-NEXT: shrq $32, %rcx |
| ; CHECK-NEXT: addl %eax, %ecx |
| ; CHECK-NEXT: movl %ecx, %edx |
| ; CHECK-NEXT: shrl $31, %edx |
| ; CHECK-NEXT: sarl $6, %ecx |
| ; CHECK-NEXT: addl %edx, %ecx |
| ; CHECK-NEXT: imull $95, %ecx, %edx |
| ; CHECK-NEXT: subl %edx, %eax |
| ; CHECK-NEXT: addl %ecx, %eax |
| ; CHECK-NEXT: # kill: def $eax killed $eax killed $rax |
| ; CHECK-NEXT: retq |
| %1 = srem i32 %x, 95 |
| %2 = sdiv i32 %x, 95 |
| %3 = add i32 %1, %2 |
| ret i32 %3 |
| } |
| |
| ; Don't fold for divisors that are a power of two. |
| define i32 @dont_fold_srem_power_of_two(i32 %x) { |
| ; CHECK-LABEL: dont_fold_srem_power_of_two: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: leal 63(%rax), %ecx |
| ; CHECK-NEXT: testl %edi, %edi |
| ; CHECK-NEXT: cmovnsl %edi, %ecx |
| ; CHECK-NEXT: andl $-64, %ecx |
| ; CHECK-NEXT: subl %ecx, %eax |
| ; CHECK-NEXT: # kill: def $eax killed $eax killed $rax |
| ; CHECK-NEXT: retq |
| %1 = srem i32 %x, 64 |
| ret i32 %1 |
| } |
| |
| ; Don't fold if the divisor is one. |
| define i32 @dont_fold_srem_one(i32 %x) { |
| ; CHECK-LABEL: dont_fold_srem_one: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: xorl %eax, %eax |
| ; CHECK-NEXT: retq |
| %1 = srem i32 %x, 1 |
| ret i32 %1 |
| } |
| |
| ; Don't fold if the divisor is 2^31. |
| define i32 @dont_fold_srem_i32_smax(i32 %x) { |
| ; CHECK-LABEL: dont_fold_srem_i32_smax: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: # kill: def $edi killed $edi def $rdi |
| ; CHECK-NEXT: leal 2147483647(%rdi), %eax |
| ; CHECK-NEXT: testl %edi, %edi |
| ; CHECK-NEXT: cmovnsl %edi, %eax |
| ; CHECK-NEXT: andl $-2147483648, %eax # imm = 0x80000000 |
| ; CHECK-NEXT: addl %edi, %eax |
| ; CHECK-NEXT: retq |
| %1 = srem i32 %x, 2147483648 |
| ret i32 %1 |
| } |
| |
| ; Don't fold i64 srem |
| define i64 @dont_fold_srem_i64(i64 %x) { |
| ; CHECK-LABEL: dont_fold_srem_i64: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movabsq $6023426636313322977, %rcx # imm = 0x5397829CBC14E5E1 |
| ; CHECK-NEXT: movq %rdi, %rax |
| ; CHECK-NEXT: imulq %rcx |
| ; CHECK-NEXT: movq %rdx, %rax |
| ; CHECK-NEXT: shrq $63, %rax |
| ; CHECK-NEXT: sarq $5, %rdx |
| ; CHECK-NEXT: addq %rax, %rdx |
| ; CHECK-NEXT: imulq $98, %rdx, %rax |
| ; CHECK-NEXT: subq %rax, %rdi |
| ; CHECK-NEXT: movq %rdi, %rax |
| ; CHECK-NEXT: retq |
| %1 = srem i64 %x, 98 |
| ret i64 %1 |
| } |