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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
define i8 @urem_low_bits_know(i8 %xx, i8 %yy) {
; CHECK-LABEL: @urem_low_bits_know(
; CHECK-NEXT: ret i8 2
;
%x = or i8 %xx, 2
%y = and i8 %yy, -4
%rem = urem i8 %x, %y
%r = and i8 %rem, 2
ret i8 %r
}
define i8 @urem_low_bits_know2(i8 %xx, i8 %yy) {
; CHECK-LABEL: @urem_low_bits_know2(
; CHECK-NEXT: ret i8 2
;
%xo = or i8 %xx, 2
%x = and i8 %xo, 254
%y = and i8 %yy, -4
%rem = urem i8 %x, %y
%r = and i8 %rem, 3
ret i8 %r
}
define i8 @urem_todo_low_bits_partially_know_should_fold_out_urem(i8 %xx, i8 %yy) {
; CHECK-LABEL: @urem_todo_low_bits_partially_know_should_fold_out_urem(
; CHECK-NEXT: [[X:%.*]] = or i8 [[XX:%.*]], 2
; CHECK-NEXT: [[Y:%.*]] = and i8 [[YY:%.*]], -4
; CHECK-NEXT: [[REM:%.*]] = urem i8 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = and i8 [[REM]], 3
; CHECK-NEXT: ret i8 [[R]]
;
%x = or i8 %xx, 2
%y = and i8 %yy, -4
%rem = urem i8 %x, %y
%r = and i8 %rem, 3
ret i8 %r
}
define i8 @urem_fail_low_bits_unknown(i8 %xx, i8 %yy) {
; CHECK-LABEL: @urem_fail_low_bits_unknown(
; CHECK-NEXT: [[X:%.*]] = or i8 [[XX:%.*]], 4
; CHECK-NEXT: [[Y:%.*]] = and i8 [[YY:%.*]], -4
; CHECK-NEXT: [[REM:%.*]] = urem i8 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = and i8 [[REM]], 2
; CHECK-NEXT: ret i8 [[R]]
;
%x = or i8 %xx, 4
%y = and i8 %yy, -4
%rem = urem i8 %x, %y
%r = and i8 %rem, 2
ret i8 %r
}
define i8 @urem_fail_low_bits_unknown2(i8 %xx, i8 %yy) {
; CHECK-LABEL: @urem_fail_low_bits_unknown2(
; CHECK-NEXT: [[X:%.*]] = or i8 [[XX:%.*]], 1
; CHECK-NEXT: [[Y:%.*]] = and i8 [[YY:%.*]], -5
; CHECK-NEXT: [[REM:%.*]] = urem i8 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = and i8 [[REM]], 2
; CHECK-NEXT: ret i8 [[R]]
;
%x = or i8 %xx, 1
%y = and i8 %yy, -5
%rem = urem i8 %x, %y
%r = and i8 %rem, 2
ret i8 %r
}
define i8 @srem_low_bits_know(i8 %xx, i8 %yy) {
; CHECK-LABEL: @srem_low_bits_know(
; CHECK-NEXT: ret i8 2
;
%x = or i8 %xx, 10
%y = and i8 %yy, -4
%rem = srem i8 %x, %y
%r = and i8 %rem, 2
ret i8 %r
}
define i8 @srem_low_bits_know2(i8 %xx, i8 %yy) {
; CHECK-LABEL: @srem_low_bits_know2(
; CHECK-NEXT: ret i8 1
;
%x = or i8 %xx, 1
%y = and i8 %yy, -2
%rem = srem i8 %x, %y
%r = and i8 %rem, 1
ret i8 %r
}
define i8 @srem_todo_low_bits_partially_know_should_fold_out_srem(i8 %xx, i8 %yy) {
; CHECK-LABEL: @srem_todo_low_bits_partially_know_should_fold_out_srem(
; CHECK-NEXT: [[X:%.*]] = or i8 [[XX:%.*]], 10
; CHECK-NEXT: [[Y:%.*]] = and i8 [[YY:%.*]], -4
; CHECK-NEXT: [[REM:%.*]] = srem i8 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = and i8 [[REM]], 3
; CHECK-NEXT: ret i8 [[R]]
;
%x = or i8 %xx, 10
%y = and i8 %yy, -4
%rem = srem i8 %x, %y
%r = and i8 %rem, 3
ret i8 %r
}
define i8 @srem_fail_low_bits_unknown(i8 %xx, i8 %yy) {
; CHECK-LABEL: @srem_fail_low_bits_unknown(
; CHECK-NEXT: [[X:%.*]] = or i8 [[XX:%.*]], 4
; CHECK-NEXT: [[Y:%.*]] = and i8 [[YY:%.*]], -4
; CHECK-NEXT: [[REM:%.*]] = srem i8 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = and i8 [[REM]], 2
; CHECK-NEXT: ret i8 [[R]]
;
%x = or i8 %xx, 4
%y = and i8 %yy, -4
%rem = srem i8 %x, %y
%r = and i8 %rem, 2
ret i8 %r
}
define i8 @srem_fail_irrelivent_bits_known(i8 %xx, i8 %yy) {
; CHECK-LABEL: @srem_fail_irrelivent_bits_known(
; CHECK-NEXT: [[X:%.*]] = or i8 [[XX:%.*]], 3
; CHECK-NEXT: [[Y:%.*]] = and i8 [[YY:%.*]], -6
; CHECK-NEXT: [[REM:%.*]] = srem i8 [[X]], [[Y]]
; CHECK-NEXT: [[R:%.*]] = and i8 [[REM]], 2
; CHECK-NEXT: ret i8 [[R]]
;
%x = or i8 %xx, 3
%y = and i8 %yy, -6
%rem = srem i8 %x, %y
%r = and i8 %rem, 2
ret i8 %r
}
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