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1; RUN: opt < %s -instcombine -S | FileCheck %s
2
3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128:n8:16:32:64"
4
5define i32 @test1(i32 %x) {
6        %tmp.1 = and i32 %x, 65535              ; <i32> [#uses=1]
7        %tmp.2 = xor i32 %tmp.1, -32768         ; <i32> [#uses=1]
8        %tmp.3 = add i32 %tmp.2, 32768          ; <i32> [#uses=1]
9        ret i32 %tmp.3
10; CHECK: @test1
11; CHECK: %sext = shl i32 %x, 16
12; CHECK: %tmp.3 = ashr exact i32 %sext, 16
13; CHECK: ret i32 %tmp.3
14}
15
16define i32 @test2(i32 %x) {
17        %tmp.1 = and i32 %x, 65535              ; <i32> [#uses=1]
18        %tmp.2 = xor i32 %tmp.1, 32768          ; <i32> [#uses=1]
19        %tmp.3 = add i32 %tmp.2, -32768         ; <i32> [#uses=1]
20        ret i32 %tmp.3
21; CHECK: @test2
22; CHECK: %sext = shl i32 %x, 16
23; CHECK: %tmp.3 = ashr exact i32 %sext, 16
24; CHECK: ret i32 %tmp.3
25}
26
27define i32 @test3(i16 %P) {
28        %tmp.1 = zext i16 %P to i32             ; <i32> [#uses=1]
29        %tmp.4 = xor i32 %tmp.1, 32768          ; <i32> [#uses=1]
30        %tmp.5 = add i32 %tmp.4, -32768         ; <i32> [#uses=1]
31        ret i32 %tmp.5
32; CHECK: @test3
33; CHECK: %tmp.5 = sext i16 %P to i32
34; CHECK: ret i32 %tmp.5
35}
36
37define i32 @test4(i16 %P) {
38        %tmp.1 = zext i16 %P to i32             ; <i32> [#uses=1]
39        %tmp.4 = xor i32 %tmp.1, 32768          ; <i32> [#uses=1]
40        %tmp.5 = add i32 %tmp.4, -32768         ; <i32> [#uses=1]
41        ret i32 %tmp.5
42; CHECK: @test4
43; CHECK: %tmp.5 = sext i16 %P to i32
44; CHECK: ret i32 %tmp.5
45}
46
47define i32 @test5(i32 %x) {
48        %tmp.1 = and i32 %x, 255                ; <i32> [#uses=1]
49        %tmp.2 = xor i32 %tmp.1, 128            ; <i32> [#uses=1]
50        %tmp.3 = add i32 %tmp.2, -128           ; <i32> [#uses=1]
51        ret i32 %tmp.3
52; CHECK: @test5
53; CHECK: %sext = shl i32 %x, 24
54; CHECK: %tmp.3 = ashr exact i32 %sext, 24
55; CHECK: ret i32 %tmp.3
56}
57
58define i32 @test6(i32 %x) {
59        %tmp.2 = shl i32 %x, 16         ; <i32> [#uses=1]
60        %tmp.4 = ashr i32 %tmp.2, 16            ; <i32> [#uses=1]
61        ret i32 %tmp.4
62; CHECK: @test6
63; CHECK: %tmp.2 = shl i32 %x, 16
64; CHECK: %tmp.4 = ashr exact i32 %tmp.2, 16
65; CHECK: ret i32 %tmp.4
66}
67
68define i32 @test7(i16 %P) {
69  %tmp.1 = zext i16 %P to i32                     ; <i32> [#uses=1]
70  %sext1 = shl i32 %tmp.1, 16                     ; <i32> [#uses=1]
71  %tmp.5 = ashr i32 %sext1, 16                    ; <i32> [#uses=1]
72  ret i32 %tmp.5
73; CHECK: @test7
74; CHECK: %tmp.5 = sext i16 %P to i32
75; CHECK: ret i32 %tmp.5
76}
77
78define i32 @test8(i32 %x) nounwind readnone {
79entry:
80  %shr = lshr i32 %x, 5                           ; <i32> [#uses=1]
81  %xor = xor i32 %shr, 67108864                   ; <i32> [#uses=1]
82  %sub = add i32 %xor, -67108864                  ; <i32> [#uses=1]
83  ret i32 %sub
84; CHECK: @test8
85; CHECK: %shr = ashr i32 %x, 5
86; CHECK: ret i32 %shr
87}
88