1 ; RUN: opt -lower-expect -strip-dead-prototypes -S -o - < %s | FileCheck %s
2 ; RUN: opt -S -passes='function(lower-expect),strip-dead-prototypes' < %s | FileCheck %s
5 define i32 @test1(i32 %x) nounwind uwtable ssp {
7 %retval = alloca i32, align 4
8 %x.addr = alloca i32, align 4
9 store i32 %x, i32* %x.addr, align 4
10 %tmp = load i32, i32* %x.addr, align 4
11 %cmp = icmp sgt i32 %tmp, 1
12 %conv = zext i1 %cmp to i32
13 %conv1 = sext i32 %conv to i64
14 %expval = call i64 @llvm.expect.i64(i64 %conv1, i64 1)
15 %tobool = icmp ne i64 %expval, 0
17 ; CHECK-NOT: @llvm.expect
18 br i1 %tobool, label %if.then, label %if.end
20 if.then: ; preds = %entry
21 %call = call i32 (...) @f()
22 store i32 %call, i32* %retval
25 if.end: ; preds = %entry
26 store i32 1, i32* %retval
29 return: ; preds = %if.end, %if.then
30 %0 = load i32, i32* %retval
34 declare i64 @llvm.expect.i64(i64, i64) nounwind readnone
38 ; CHECK-LABEL: @test2(
39 define i32 @test2(i32 %x) nounwind uwtable ssp {
41 %retval = alloca i32, align 4
42 %x.addr = alloca i32, align 4
43 store i32 %x, i32* %x.addr, align 4
44 %tmp = load i32, i32* %x.addr, align 4
45 %conv = sext i32 %tmp to i64
46 %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1)
47 %tobool = icmp ne i64 %expval, 0
49 ; CHECK-NOT: @llvm.expect
50 br i1 %tobool, label %if.then, label %if.end
52 if.then: ; preds = %entry
53 %call = call i32 (...) @f()
54 store i32 %call, i32* %retval
57 if.end: ; preds = %entry
58 store i32 1, i32* %retval
61 return: ; preds = %if.end, %if.then
62 %0 = load i32, i32* %retval
66 ; CHECK-LABEL: @test3(
67 define i32 @test3(i32 %x) nounwind uwtable ssp {
69 %retval = alloca i32, align 4
70 %x.addr = alloca i32, align 4
71 store i32 %x, i32* %x.addr, align 4
72 %tmp = load i32, i32* %x.addr, align 4
73 %tobool = icmp ne i32 %tmp, 0
74 %lnot = xor i1 %tobool, true
75 %lnot.ext = zext i1 %lnot to i32
76 %conv = sext i32 %lnot.ext to i64
77 %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1)
78 %tobool1 = icmp ne i64 %expval, 0
80 ; CHECK-NOT: @llvm.expect
81 br i1 %tobool1, label %if.then, label %if.end
83 if.then: ; preds = %entry
84 %call = call i32 (...) @f()
85 store i32 %call, i32* %retval
88 if.end: ; preds = %entry
89 store i32 1, i32* %retval
92 return: ; preds = %if.end, %if.then
93 %0 = load i32, i32* %retval
97 ; CHECK-LABEL: @test4(
98 define i32 @test4(i32 %x) nounwind uwtable ssp {
100 %retval = alloca i32, align 4
101 %x.addr = alloca i32, align 4
102 store i32 %x, i32* %x.addr, align 4
103 %tmp = load i32, i32* %x.addr, align 4
104 %tobool = icmp ne i32 %tmp, 0
105 %lnot = xor i1 %tobool, true
106 %lnot1 = xor i1 %lnot, true
107 %lnot.ext = zext i1 %lnot1 to i32
108 %conv = sext i32 %lnot.ext to i64
109 %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1)
110 %tobool2 = icmp ne i64 %expval, 0
112 ; CHECK-NOT: @llvm.expect
113 br i1 %tobool2, label %if.then, label %if.end
115 if.then: ; preds = %entry
116 %call = call i32 (...) @f()
117 store i32 %call, i32* %retval
120 if.end: ; preds = %entry
121 store i32 1, i32* %retval
124 return: ; preds = %if.end, %if.then
125 %0 = load i32, i32* %retval
129 ; CHECK-LABEL: @test5(
130 define i32 @test5(i32 %x) nounwind uwtable ssp {
132 %retval = alloca i32, align 4
133 %x.addr = alloca i32, align 4
134 store i32 %x, i32* %x.addr, align 4
135 %tmp = load i32, i32* %x.addr, align 4
136 %cmp = icmp slt i32 %tmp, 0
137 %conv = zext i1 %cmp to i32
138 %conv1 = sext i32 %conv to i64
139 %expval = call i64 @llvm.expect.i64(i64 %conv1, i64 0)
140 %tobool = icmp ne i64 %expval, 0
142 ; CHECK-NOT: @llvm.expect
143 br i1 %tobool, label %if.then, label %if.end
145 if.then: ; preds = %entry
146 %call = call i32 (...) @f()
147 store i32 %call, i32* %retval
150 if.end: ; preds = %entry
151 store i32 1, i32* %retval
154 return: ; preds = %if.end, %if.then
155 %0 = load i32, i32* %retval
159 ; CHECK-LABEL: @test6(
160 define i32 @test6(i32 %x) nounwind uwtable ssp {
162 %retval = alloca i32, align 4
163 %x.addr = alloca i32, align 4
164 store i32 %x, i32* %x.addr, align 4
165 %tmp = load i32, i32* %x.addr, align 4
166 %conv = sext i32 %tmp to i64
167 %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1)
169 ; CHECK-NOT: @llvm.expect
170 switch i64 %expval, label %sw.epilog [
175 sw.bb: ; preds = %entry, %entry
176 store i32 0, i32* %retval
179 sw.epilog: ; preds = %entry
180 store i32 1, i32* %retval
183 return: ; preds = %sw.epilog, %sw.bb
184 %0 = load i32, i32* %retval
188 ; CHECK-LABEL: @test7(
189 define i32 @test7(i32 %x) nounwind uwtable ssp {
191 %retval = alloca i32, align 4
192 %x.addr = alloca i32, align 4
193 store i32 %x, i32* %x.addr, align 4
194 %tmp = load i32, i32* %x.addr, align 4
195 %conv = sext i32 %tmp to i64
196 %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1)
198 ; CHECK-NOT: @llvm.expect
199 switch i64 %expval, label %sw.epilog [
204 sw.bb: ; preds = %entry, %entry
205 %tmp1 = load i32, i32* %x.addr, align 4
206 store i32 %tmp1, i32* %retval
209 sw.epilog: ; preds = %entry
210 store i32 0, i32* %retval
213 return: ; preds = %sw.epilog, %sw.bb
214 %0 = load i32, i32* %retval
218 ; CHECK-LABEL: @test8(
219 define i32 @test8(i32 %x) nounwind uwtable ssp {
221 %retval = alloca i32, align 4
222 %x.addr = alloca i32, align 4
223 store i32 %x, i32* %x.addr, align 4
224 %tmp = load i32, i32* %x.addr, align 4
225 %cmp = icmp sgt i32 %tmp, 1
226 %conv = zext i1 %cmp to i32
227 %expval = call i32 @llvm.expect.i32(i32 %conv, i32 1)
228 %tobool = icmp ne i32 %expval, 0
230 ; CHECK-NOT: @llvm.expect
231 br i1 %tobool, label %if.then, label %if.end
233 if.then: ; preds = %entry
234 %call = call i32 (...) @f()
235 store i32 %call, i32* %retval
238 if.end: ; preds = %entry
239 store i32 1, i32* %retval
242 return: ; preds = %if.end, %if.then
243 %0 = load i32, i32* %retval
247 declare i32 @llvm.expect.i32(i32, i32) nounwind readnone
249 ; CHECK-LABEL: @test9(
250 define i32 @test9(i32 %x) nounwind uwtable ssp {
252 %retval = alloca i32, align 4
253 %x.addr = alloca i32, align 4
254 store i32 %x, i32* %x.addr, align 4
255 %tmp = load i32, i32* %x.addr, align 4
256 %cmp = icmp sgt i32 %tmp, 1
257 %expval = call i1 @llvm.expect.i1(i1 %cmp, i1 1)
259 ; CHECK-NOT: @llvm.expect
260 br i1 %expval, label %if.then, label %if.end
262 if.then: ; preds = %entry
263 %call = call i32 (...) @f()
264 store i32 %call, i32* %retval
267 if.end: ; preds = %entry
268 store i32 1, i32* %retval
271 return: ; preds = %if.end, %if.then
272 %0 = load i32, i32* %retval
276 ; CHECK-LABEL: @test10(
277 define i32 @test10(i64 %t6) {
278 %t7 = call i64 @llvm.expect.i64(i64 %t6, i64 0)
279 %t8 = icmp ne i64 %t7, 0
280 %t9 = select i1 %t8, i32 1, i32 2
281 ; CHECK: select{{.*}}, !prof !1
286 declare i1 @llvm.expect.i1(i1, i1) nounwind readnone
288 ; CHECK: !0 = !{!"branch_weights", i32 2000, i32 1}
289 ; CHECK: !1 = !{!"branch_weights", i32 1, i32 2000}
290 ; CHECK: !2 = !{!"branch_weights", i32 1, i32 2000, i32 1}
291 ; CHECK: !3 = !{!"branch_weights", i32 2000, i32 1, i32 1}