sub-xor.ll
1.39 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine -S < %s | FileCheck %s
define i32 @test1(i32 %x) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 31
; CHECK-NEXT: [[SUB:%.*]] = xor i32 [[AND]], 63
; CHECK-NEXT: ret i32 [[SUB]]
;
%and = and i32 %x, 31
%sub = sub i32 63, %and
ret i32 %sub
}
define <2 x i32> @test1vec(<2 x i32> %x) {
; CHECK-LABEL: @test1vec(
; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> %x, <i32 31, i32 31>
; CHECK-NEXT: [[SUB:%.*]] = xor <2 x i32> [[AND]], <i32 63, i32 63>
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%and = and <2 x i32> %x, <i32 31, i32 31>
%sub = sub <2 x i32> <i32 63, i32 63>, %and
ret <2 x i32> %sub
}
declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone
define i32 @test2(i32 %x) nounwind {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[COUNT:%.*]] = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true)
; CHECK-NEXT: [[SUB:%.*]] = xor i32 [[COUNT]], 31
; CHECK-NEXT: ret i32 [[SUB]]
;
%count = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true) nounwind readnone
%sub = sub i32 31, %count
ret i32 %sub
}
define i32 @test3(i32 %x) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 31
; CHECK-NEXT: [[ADD:%.*]] = sub nuw nsw i32 73, [[AND]]
; CHECK-NEXT: ret i32 [[ADD]]
;
%and = and i32 %x, 31
%sub = xor i32 31, %and
%add = add i32 %sub, 42
ret i32 %add
}