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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=instsimplify -S < %s | FileCheck %s
declare i8 @llvm.abs.i8(i8, i1)
define i1 @abs_low_bit_set(i8 %x) {
; CHECK-LABEL: @abs_low_bit_set(
; CHECK-NEXT: ret i1 false
;
%xx = and i8 %x, 240
%v = or i8 %xx, 4
%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
%and = and i8 %abs, 4
%r = icmp eq i8 %and, 0
ret i1 %r
}
define i1 @abs_unknown_low_bit_set_fail(i8 %x) {
; CHECK-LABEL: @abs_unknown_low_bit_set_fail(
; CHECK-NEXT: [[V:%.*]] = or i8 [[X:%.*]], 2
; CHECK-NEXT: [[ABS:%.*]] = call i8 @llvm.abs.i8(i8 [[V]], i1 true)
; CHECK-NEXT: [[AND:%.*]] = and i8 [[ABS]], 2
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[AND]], 0
; CHECK-NEXT: ret i1 [[R]]
;
%v = or i8 %x, 2
%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
%and = and i8 %abs, 2
%r = icmp eq i8 %and, 0
ret i1 %r
}
define i1 @abs_negative(i8 %x) {
; CHECK-LABEL: @abs_negative(
; CHECK-NEXT: ret i1 false
;
%xx = and i8 %x, 240
%v = or i8 %xx, 132
%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
%and = and i8 %abs, 8
%r = icmp eq i8 %and, 0
ret i1 %r
}
define i1 @abs_negative2(i8 %x) {
; CHECK-LABEL: @abs_negative2(
; CHECK-NEXT: ret i1 false
;
%v = or i8 %x, 131
%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
%and = and i8 %abs, 2
%r = icmp eq i8 %and, 2
ret i1 %r
}
define i1 @abs_negative_no_carry_info_fail(i8 %x) {
; CHECK-LABEL: @abs_negative_no_carry_info_fail(
; CHECK-NEXT: [[V:%.*]] = or i8 [[X:%.*]], -126
; CHECK-NEXT: [[ABS:%.*]] = call i8 @llvm.abs.i8(i8 [[V]], i1 true)
; CHECK-NEXT: [[AND:%.*]] = and i8 [[ABS]], 2
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[AND]], 0
; CHECK-NEXT: ret i1 [[R]]
;
%v = or i8 %x, 130
%abs = call i8 @llvm.abs.i8(i8 %v, i1 true)
%and = and i8 %abs, 2
%r = icmp eq i8 %and, 0
ret i1 %r
}
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