• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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"
4
5declare i32 @llvm.ctpop.i32(i32)
6declare i32 @llvm.ctlz.i32(i32, i1)
7declare i32 @llvm.cttz.i32(i32, i1)
8
9define i64 @test1(i32 %x) {
10  %t = call i32 @llvm.ctpop.i32(i32 %x)
11  %s = sext i32 %t to i64
12  ret i64 %s
13
14; CHECK-LABEL: @test1(
15; CHECK: zext i32 %t
16}
17
18define i64 @test2(i32 %x) {
19  %t = call i32 @llvm.ctlz.i32(i32 %x, i1 true)
20  %s = sext i32 %t to i64
21  ret i64 %s
22
23; CHECK-LABEL: @test2(
24; CHECK: zext i32 %t
25}
26
27define i64 @test3(i32 %x) {
28  %t = call i32 @llvm.cttz.i32(i32 %x, i1 true)
29  %s = sext i32 %t to i64
30  ret i64 %s
31
32; CHECK-LABEL: @test3(
33; CHECK: zext i32 %t
34}
35
36define i64 @test4(i32 %x) {
37  %t = udiv i32 %x, 3
38  %s = sext i32 %t to i64
39  ret i64 %s
40
41; CHECK-LABEL: @test4(
42; CHECK: zext i32 %t
43}
44
45define i64 @test5(i32 %x) {
46  %t = urem i32 %x, 30000
47  %s = sext i32 %t to i64
48  ret i64 %s
49; CHECK-LABEL: @test5(
50; CHECK: zext i32 %t
51}
52
53define i64 @test6(i32 %x) {
54  %u = lshr i32 %x, 3
55  %t = mul i32 %u, 3
56  %s = sext i32 %t to i64
57  ret i64 %s
58; CHECK-LABEL: @test6(
59; CHECK: zext i32 %t
60}
61
62define i64 @test7(i32 %x) {
63  %t = and i32 %x, 511
64  %u = sub i32 20000, %t
65  %s = sext i32 %u to i64
66  ret i64 %s
67; CHECK-LABEL: @test7(
68; CHECK: zext i32 %u to i64
69}
70
71define i32 @test8(i8 %a, i32 %f, i1 %p, i32* %z) {
72  %d = lshr i32 %f, 24
73  %e = select i1 %p, i32 %d, i32 0
74  %s = trunc i32 %e to i16
75  %n = sext i16 %s to i32
76  ret i32 %n
77; CHECK-LABEL: @test8(
78; CHECK: %d = lshr i32 %f, 24
79; CHECK: %n = select i1 %p, i32 %d, i32 0
80; CHECK: ret i32 %n
81}
82
83; rdar://6013816
84define i16 @test9(i16 %t, i1 %cond) nounwind {
85entry:
86	br i1 %cond, label %T, label %F
87T:
88	%t2 = sext i16 %t to i32
89	br label %F
90
91F:
92	%V = phi i32 [%t2, %T], [42, %entry]
93	%W = trunc i32 %V to i16
94	ret i16 %W
95; CHECK-LABEL: @test9(
96; CHECK: T:
97; CHECK-NEXT: br label %F
98; CHECK: F:
99; CHECK-NEXT: phi i16
100; CHECK-NEXT: ret i16
101}
102
103; PR2638
104define i32 @test10(i32 %i) nounwind  {
105entry:
106        %tmp12 = trunc i32 %i to i8
107        %tmp16 = shl i8 %tmp12, 6
108        %a = ashr i8 %tmp16, 6
109        %b = sext i8 %a to i32
110        ret i32 %b
111; CHECK-LABEL: @test10(
112; CHECK:  shl i32 %i, 30
113; CHECK-NEXT: ashr exact i32
114; CHECK-NEXT: ret i32
115}
116
117define void @test11(<2 x i16> %srcA, <2 x i16> %srcB, <2 x i16>* %dst) {
118  %cmp = icmp eq <2 x i16> %srcB, %srcA
119  %sext = sext <2 x i1> %cmp to <2 x i16>
120  %tmask = ashr <2 x i16> %sext, <i16 15, i16 15>
121  store <2 x i16> %tmask, <2 x i16>* %dst
122  ret void
123; CHECK-LABEL: @test11(
124; CHECK-NEXT: icmp eq
125; CHECK-NEXT: sext <2 x i1>
126; CHECK-NEXT: store <2 x i16>
127; CHECK-NEXT: ret
128}
129
130define i64 @test12(i32 %x) nounwind {
131  %shr = lshr i32 %x, 1
132  %sub = sub nsw i32 0, %shr
133  %conv = sext i32 %sub to i64
134  ret i64 %conv
135; CHECK-LABEL: @test12(
136; CHECK: sext
137; CHECK: ret
138}
139
140define i32 @test13(i32 %x) nounwind {
141  %and = and i32 %x, 8
142  %cmp = icmp eq i32 %and, 0
143  %ext = sext i1 %cmp to i32
144  ret i32 %ext
145; CHECK-LABEL: @test13(
146; CHECK-NEXT: %and = lshr i32 %x, 3
147; CHECK-NEXT: %1 = and i32 %and, 1
148; CHECK-NEXT: %sext = add nsw i32 %1, -1
149; CHECK-NEXT: ret i32 %sext
150}
151
152define i32 @test14(i16 %x) nounwind {
153  %and = and i16 %x, 16
154  %cmp = icmp ne i16 %and, 16
155  %ext = sext i1 %cmp to i32
156  ret i32 %ext
157; CHECK-LABEL: @test14(
158; CHECK-NEXT: %and = lshr i16 %x, 4
159; CHECK-NEXT: %1 = and i16 %and, 1
160; CHECK-NEXT: %sext = add nsw i16 %1, -1
161; CHECK-NEXT: %ext = sext i16 %sext to i32
162; CHECK-NEXT: ret i32 %ext
163}
164
165define i32 @test15(i32 %x) nounwind {
166  %and = and i32 %x, 16
167  %cmp = icmp ne i32 %and, 0
168  %ext = sext i1 %cmp to i32
169  ret i32 %ext
170; CHECK-LABEL: @test15(
171; CHECK-NEXT: %1 = shl i32 %x, 27
172; CHECK-NEXT: %sext = ashr i32 %1, 31
173; CHECK-NEXT: ret i32 %sext
174}
175
176define i32 @test16(i16 %x) nounwind {
177  %and = and i16 %x, 8
178  %cmp = icmp eq i16 %and, 8
179  %ext = sext i1 %cmp to i32
180  ret i32 %ext
181; CHECK-LABEL: @test16(
182; CHECK-NEXT: %1 = shl i16 %x, 12
183; CHECK-NEXT: %sext = ashr i16 %1, 15
184; CHECK-NEXT: %ext = sext i16 %sext to i32
185; CHECK-NEXT: ret i32 %ext
186}
187
188define i32 @test17(i1 %x) nounwind {
189  %c1 = sext i1 %x to i32
190  %c2 = sub i32 0, %c1
191  ret i32 %c2
192; CHECK-LABEL: @test17(
193; CHECK-NEXT: [[TEST17:%.*]] = zext i1 %x to i32
194; CHECK-NEXT: ret i32 [[TEST17]]
195}
196