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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=ipsccp -S %s | FileCheck %s
define i8 @range_from_lshr(i8 %a) {
; CHECK-LABEL: @range_from_lshr(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A_SHR:%.*]] = lshr i8 [[A:%.*]], 1
; CHECK-NEXT: [[SUB_1:%.*]] = sub nsw i8 [[A_SHR]], 1
; CHECK-NEXT: [[SUB_2:%.*]] = sub i8 [[A_SHR]], -128
; CHECK-NEXT: [[SUB_3:%.*]] = sub i8 [[A_SHR]], -127
; CHECK-NEXT: [[SUB_4:%.*]] = sub i8 [[A_SHR]], -1
; CHECK-NEXT: [[RES_1:%.*]] = xor i8 [[SUB_1]], [[SUB_2]]
; CHECK-NEXT: [[RES_2:%.*]] = xor i8 [[RES_1]], [[SUB_3]]
; CHECK-NEXT: [[RES_3:%.*]] = xor i8 [[RES_2]], [[SUB_4]]
; CHECK-NEXT: ret i8 [[RES_3]]
;
entry:
%a.shr = lshr i8 %a, 1
%sub.1 = sub i8 %a.shr, 1
%sub.2 = sub i8 %a.shr, 128
%sub.3 = sub i8 %a.shr, 129
%sub.4 = sub i8 %a.shr, -1
%res.1 = xor i8 %sub.1, %sub.2
%res.2 = xor i8 %res.1, %sub.3
%res.3 = xor i8 %res.2, %sub.4
ret i8 %res.3
}
define i8 @sub_zero(i8 %a) {
; CHECK-LABEL: @sub_zero(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SUB_1:%.*]] = sub i8 0, [[A:%.*]]
; CHECK-NEXT: [[SUB_2:%.*]] = sub nuw nsw i8 -1, [[A]]
; CHECK-NEXT: [[SUB_3:%.*]] = sub i8 1, [[A]]
; CHECK-NEXT: [[SUB_4:%.*]] = sub i8 [[A]], -1
; CHECK-NEXT: [[RES_1:%.*]] = xor i8 [[SUB_1]], [[SUB_2]]
; CHECK-NEXT: [[RES_2:%.*]] = xor i8 [[RES_1]], [[SUB_3]]
; CHECK-NEXT: [[RES_3:%.*]] = xor i8 [[RES_2]], [[SUB_4]]
; CHECK-NEXT: ret i8 [[RES_3]]
;
entry:
%sub.1 = sub i8 0, %a
%sub.2 = sub i8 -1, %a
%sub.3 = sub i8 1, %a
%sub.4 = sub i8 %a, -1
%res.1 = xor i8 %sub.1, %sub.2
%res.2 = xor i8 %res.1, %sub.3
%res.3 = xor i8 %res.2, %sub.4
ret i8 %res.3
}
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