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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=CHECK3 4define i32 @fold_srem_positive_odd(i32 %x) {5; CHECK-LABEL: fold_srem_positive_odd:6; CHECK: # %bb.0:7; CHECK-NEXT: movslq %edi, %rax8; CHECK-NEXT: imulq $-1401515643, %rax, %rcx # imm = 0xAC7691859; CHECK-NEXT: shrq $32, %rcx10; CHECK-NEXT: addl %eax, %ecx11; CHECK-NEXT: movl %ecx, %edx12; CHECK-NEXT: shrl $31, %edx13; CHECK-NEXT: sarl $6, %ecx14; CHECK-NEXT: addl %edx, %ecx15; CHECK-NEXT: imull $95, %ecx, %ecx16; CHECK-NEXT: subl %ecx, %eax17; CHECK-NEXT: # kill: def $eax killed $eax killed $rax18; CHECK-NEXT: retq19 %1 = srem i32 %x, 9520 ret i32 %121}22 23 24define i32 @fold_srem_positive_even(i32 %x) {25; CHECK-LABEL: fold_srem_positive_even:26; CHECK: # %bb.0:27; CHECK-NEXT: movslq %edi, %rax28; CHECK-NEXT: imulq $1037275121, %rax, %rcx # imm = 0x3DD38FF129; CHECK-NEXT: movq %rcx, %rdx30; CHECK-NEXT: shrq $63, %rdx31; CHECK-NEXT: sarq $40, %rcx32; CHECK-NEXT: addl %edx, %ecx33; CHECK-NEXT: imull $1060, %ecx, %ecx # imm = 0x42434; CHECK-NEXT: subl %ecx, %eax35; CHECK-NEXT: # kill: def $eax killed $eax killed $rax36; CHECK-NEXT: retq37 %1 = srem i32 %x, 106038 ret i32 %139}40 41 42define i32 @fold_srem_negative_odd(i32 %x) {43; CHECK-LABEL: fold_srem_negative_odd:44; CHECK: # %bb.0:45; CHECK-NEXT: movslq %edi, %rax46; CHECK-NEXT: imulq $-1520762971, %rax, %rcx # imm = 0xA55AFFA547; CHECK-NEXT: movq %rcx, %rdx48; CHECK-NEXT: shrq $63, %rdx49; CHECK-NEXT: sarq $40, %rcx50; CHECK-NEXT: addl %edx, %ecx51; CHECK-NEXT: imull $-723, %ecx, %ecx # imm = 0xFD2D52; CHECK-NEXT: subl %ecx, %eax53; CHECK-NEXT: # kill: def $eax killed $eax killed $rax54; CHECK-NEXT: retq55 %1 = srem i32 %x, -72356 ret i32 %157}58 59 60define i32 @fold_srem_negative_even(i32 %x) {61; CHECK-LABEL: fold_srem_negative_even:62; CHECK: # %bb.0:63; CHECK-NEXT: movslq %edi, %rax64; CHECK-NEXT: imulq $-47844377, %rax, %rcx # imm = 0xFD25F3E765; CHECK-NEXT: movq %rcx, %rdx66; CHECK-NEXT: shrq $63, %rdx67; CHECK-NEXT: sarq $40, %rcx68; CHECK-NEXT: addl %edx, %ecx69; CHECK-NEXT: imull $-22981, %ecx, %ecx # imm = 0xA63B70; CHECK-NEXT: subl %ecx, %eax71; CHECK-NEXT: # kill: def $eax killed $eax killed $rax72; CHECK-NEXT: retq73 %1 = srem i32 %x, -2298174 ret i32 %175}76 77 78; Don't fold if we can combine srem with sdiv.79define i32 @combine_srem_sdiv(i32 %x) {80; CHECK-LABEL: combine_srem_sdiv:81; CHECK: # %bb.0:82; CHECK-NEXT: movslq %edi, %rax83; CHECK-NEXT: imulq $-1401515643, %rax, %rcx # imm = 0xAC76918584; CHECK-NEXT: shrq $32, %rcx85; CHECK-NEXT: addl %eax, %ecx86; CHECK-NEXT: movl %ecx, %edx87; CHECK-NEXT: shrl $31, %edx88; CHECK-NEXT: sarl $6, %ecx89; CHECK-NEXT: addl %edx, %ecx90; CHECK-NEXT: imull $95, %ecx, %edx91; CHECK-NEXT: subl %edx, %eax92; CHECK-NEXT: addl %ecx, %eax93; CHECK-NEXT: # kill: def $eax killed $eax killed $rax94; CHECK-NEXT: retq95 %1 = srem i32 %x, 9596 %2 = sdiv i32 %x, 9597 %3 = add i32 %1, %298 ret i32 %399}100 101; Don't fold for divisors that are a power of two.102define i32 @dont_fold_srem_power_of_two(i32 %x) {103; CHECK-LABEL: dont_fold_srem_power_of_two:104; CHECK: # %bb.0:105; CHECK-NEXT: movl %edi, %eax106; CHECK-NEXT: leal 63(%rax), %ecx107; CHECK-NEXT: testl %edi, %edi108; CHECK-NEXT: cmovnsl %edi, %ecx109; CHECK-NEXT: andl $-64, %ecx110; CHECK-NEXT: subl %ecx, %eax111; CHECK-NEXT: # kill: def $eax killed $eax killed $rax112; CHECK-NEXT: retq113 %1 = srem i32 %x, 64114 ret i32 %1115}116 117; Don't fold if the divisor is one.118define i32 @dont_fold_srem_one(i32 %x) {119; CHECK-LABEL: dont_fold_srem_one:120; CHECK: # %bb.0:121; CHECK-NEXT: xorl %eax, %eax122; CHECK-NEXT: retq123 %1 = srem i32 %x, 1124 ret i32 %1125}126 127; Don't fold if the divisor is 2^31.128define i32 @dont_fold_srem_i32_smax(i32 %x) {129; CHECK-LABEL: dont_fold_srem_i32_smax:130; CHECK: # %bb.0:131; CHECK-NEXT: # kill: def $edi killed $edi def $rdi132; CHECK-NEXT: leal 2147483647(%rdi), %eax133; CHECK-NEXT: testl %edi, %edi134; CHECK-NEXT: cmovnsl %edi, %eax135; CHECK-NEXT: andl $-2147483648, %eax # imm = 0x80000000136; CHECK-NEXT: addl %edi, %eax137; CHECK-NEXT: retq138 %1 = srem i32 %x, 2147483648139 ret i32 %1140}141 142; Don't fold i64 srem143define i64 @dont_fold_srem_i64(i64 %x) {144; CHECK-LABEL: dont_fold_srem_i64:145; CHECK: # %bb.0:146; CHECK-NEXT: movabsq $6023426636313322977, %rcx # imm = 0x5397829CBC14E5E1147; CHECK-NEXT: movq %rdi, %rax148; CHECK-NEXT: imulq %rcx149; CHECK-NEXT: movq %rdx, %rax150; CHECK-NEXT: shrq $63, %rax151; CHECK-NEXT: sarq $5, %rdx152; CHECK-NEXT: addq %rax, %rdx153; CHECK-NEXT: imulq $98, %rdx, %rax154; CHECK-NEXT: subq %rax, %rdi155; CHECK-NEXT: movq %rdi, %rax156; CHECK-NEXT: retq157 %1 = srem i64 %x, 98158 ret i64 %1159}160