d294e3cb76
Add `exact` flag handling for `udiv` and add entire `sdiv` case. Differential Revision: https://reviews.llvm.org/D150098
71 lines
1.8 KiB
LLVM
71 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown | FileCheck %s
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define i8 @sdiv_neg_neg_high_bits(i8 %x, i8 %y) {
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; CHECK-LABEL: sdiv_neg_neg_high_bits:
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; CHECK: # %bb.0:
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: retq
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%num = or i8 %x, 128
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%denum = or i8 %y, 131
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%div = sdiv i8 %num, %denum
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%r = and i8 %div, 128
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ret i8 %r
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}
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define i8 @sdiv_exact_odd_odd(i8 %x, i8 %y) {
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; CHECK-LABEL: sdiv_exact_odd_odd:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movb $1, %al
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; CHECK-NEXT: retq
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%num = or i8 %x, 1
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%denum = or i8 %y, 1
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%div = sdiv exact i8 %num, %denum
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%r = and i8 %div, 1
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ret i8 %r
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}
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define i8 @sdiv_exact_even_even_fail_unknown(i8 %x, i8 %y) {
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; CHECK-LABEL: sdiv_exact_even_even_fail_unknown:
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; CHECK: # %bb.0:
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; CHECK-NEXT: andb $-2, %dil
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; CHECK-NEXT: andb $-2, %sil
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; CHECK-NEXT: movsbl %dil, %eax
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; CHECK-NEXT: idivb %sil
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; CHECK-NEXT: andb $1, %al
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; CHECK-NEXT: retq
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%num = and i8 %x, -2
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%denum = and i8 %y, -2
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%div = sdiv exact i8 %num, %denum
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%r = and i8 %div, 1
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ret i8 %r
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}
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define i8 @udiv_exact_even_odd(i8 %x, i8 %y) {
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; CHECK-LABEL: udiv_exact_even_odd:
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; CHECK: # %bb.0:
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: retq
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%num = and i8 %x, -2
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%denum = or i8 %y, 1
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%div = udiv exact i8 %num, %denum
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%r = and i8 %div, 1
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ret i8 %r
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}
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define i8 @udiv_exact_even_even_fail_unknown(i8 %x, i8 %y) {
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; CHECK-LABEL: udiv_exact_even_even_fail_unknown:
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; CHECK: # %bb.0:
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; CHECK-NEXT: andb $-2, %dil
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; CHECK-NEXT: andb $-2, %sil
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; CHECK-NEXT: movzbl %dil, %eax
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; CHECK-NEXT: divb %sil
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; CHECK-NEXT: andb $1, %al
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; CHECK-NEXT: retq
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%num = and i8 %x, -2
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%denum = and i8 %y, -2
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%div = udiv exact i8 %num, %denum
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%r = and i8 %div, 1
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ret i8 %r
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}
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