1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; Check that 64-bit division is bypassed correctly. 3 ; RUN: llc < %s -mattr=+idivq-to-divl -mtriple=x86_64-unknown-linux-gnu | FileCheck %s 4 5 ; Additional tests for 64-bit divide bypass 6 7 define i64 @Test_get_quotient(i64 %a, i64 %b) nounwind { 8 ; CHECK-LABEL: Test_get_quotient: 9 ; CHECK: # %bb.0: 10 ; CHECK-NEXT: movq %rdi, %rax 11 ; CHECK-NEXT: orq %rsi, %rax 12 ; CHECK-NEXT: shrq $32, %rax 13 ; CHECK-NEXT: je .LBB0_1 14 ; CHECK-NEXT: # %bb.2: 15 ; CHECK-NEXT: movq %rdi, %rax 16 ; CHECK-NEXT: cqto 17 ; CHECK-NEXT: idivq %rsi 18 ; CHECK-NEXT: retq 19 ; CHECK-NEXT: .LBB0_1: 20 ; CHECK-NEXT: xorl %edx, %edx 21 ; CHECK-NEXT: movl %edi, %eax 22 ; CHECK-NEXT: divl %esi 23 ; CHECK-NEXT: # kill: def $eax killed $eax def $rax 24 ; CHECK-NEXT: retq 25 %result = sdiv i64 %a, %b 26 ret i64 %result 27 } 28 29 define i64 @Test_get_remainder(i64 %a, i64 %b) nounwind { 30 ; CHECK-LABEL: Test_get_remainder: 31 ; CHECK: # %bb.0: 32 ; CHECK-NEXT: movq %rdi, %rax 33 ; CHECK-NEXT: orq %rsi, %rax 34 ; CHECK-NEXT: shrq $32, %rax 35 ; CHECK-NEXT: je .LBB1_1 36 ; CHECK-NEXT: # %bb.2: 37 ; CHECK-NEXT: movq %rdi, %rax 38 ; CHECK-NEXT: cqto 39 ; CHECK-NEXT: idivq %rsi 40 ; CHECK-NEXT: movq %rdx, %rax 41 ; CHECK-NEXT: retq 42 ; CHECK-NEXT: .LBB1_1: 43 ; CHECK-NEXT: xorl %edx, %edx 44 ; CHECK-NEXT: movl %edi, %eax 45 ; CHECK-NEXT: divl %esi 46 ; CHECK-NEXT: # kill: def $edx killed $edx def $rdx 47 ; CHECK-NEXT: movq %rdx, %rax 48 ; CHECK-NEXT: retq 49 %result = srem i64 %a, %b 50 ret i64 %result 51 } 52 53 define i64 @Test_get_quotient_and_remainder(i64 %a, i64 %b) nounwind { 54 ; CHECK-LABEL: Test_get_quotient_and_remainder: 55 ; CHECK: # %bb.0: 56 ; CHECK-NEXT: movq %rdi, %rax 57 ; CHECK-NEXT: orq %rsi, %rax 58 ; CHECK-NEXT: shrq $32, %rax 59 ; CHECK-NEXT: je .LBB2_1 60 ; CHECK-NEXT: # %bb.2: 61 ; CHECK-NEXT: movq %rdi, %rax 62 ; CHECK-NEXT: cqto 63 ; CHECK-NEXT: idivq %rsi 64 ; CHECK-NEXT: addq %rdx, %rax 65 ; CHECK-NEXT: retq 66 ; CHECK-NEXT: .LBB2_1: 67 ; CHECK-NEXT: xorl %edx, %edx 68 ; CHECK-NEXT: movl %edi, %eax 69 ; CHECK-NEXT: divl %esi 70 ; CHECK-NEXT: # kill: def $edx killed $edx def $rdx 71 ; CHECK-NEXT: # kill: def $eax killed $eax def $rax 72 ; CHECK-NEXT: addq %rdx, %rax 73 ; CHECK-NEXT: retq 74 %resultdiv = sdiv i64 %a, %b 75 %resultrem = srem i64 %a, %b 76 %result = add i64 %resultdiv, %resultrem 77 ret i64 %result 78 } 79
