1 ; RUN: opt -insert-edge-profiling -o %t1 < %s
2 ; RUN: rm -f %t1.prof_data
3 ; RUN: lli -load %llvmshlibdir/libprofile_rt%shlibext %t1 \
4 ; RUN: -llvmprof-output %t1.prof_data
5 ; RUN: opt -profile-file %t1.prof_data -profile-metadata-loader -S -o - < %s \
7 ; RUN: rm -f %t1.prof_data
9 ;; func_switch - Test branch probabilities for a switch instruction with an
10 ;; even chance of taking each case (or no case).
11 define i32 @func_switch(i32 %N) nounwind uwtable {
13 %retval = alloca i32, align 4
14 %N.addr = alloca i32, align 4
15 store i32 %N, i32* %N.addr, align 4
16 %0 = load i32* %N.addr, align 4
18 switch i32 %rem, label %sw.epilog [
26 store i32 5, i32* %retval
30 store i32 6, i32* %retval
34 store i32 7, i32* %retval
38 store i32 8, i32* %retval
42 %1 = load i32* %retval
46 ;; func_switch_switch - Test branch probabilities in a switch-instruction that
47 ;; leads to further switch instructions. The first-tier switch occludes some
48 ;; possibilities in the second-tier switches, leading to some branches having a
50 define i32 @func_switch_switch(i32 %N) nounwind uwtable {
52 %retval = alloca i32, align 4
53 %N.addr = alloca i32, align 4
54 store i32 %N, i32* %N.addr, align 4
55 %0 = load i32* %N.addr, align 4
57 switch i32 %rem, label %sw.default11 [
64 %1 = load i32* %N.addr, align 4
65 %rem1 = srem i32 %1, 4
66 switch i32 %rem1, label %sw.default [
74 store i32 5, i32* %retval
78 store i32 6, i32* %retval
82 store i32 7, i32* %retval
86 store i32 8, i32* %retval
90 %2 = load i32* %N.addr, align 4
91 %rem6 = srem i32 %2, 4
92 switch i32 %rem6, label %sw.default10 [
100 store i32 9, i32* %retval
104 store i32 10, i32* %retval
108 store i32 11, i32* %retval
112 store i32 12, i32* %retval
116 store i32 13, i32* %retval
120 %3 = load i32* %retval
124 define i32 @main(i32 %argc, i8** %argv) nounwind uwtable {
126 %retval = alloca i32, align 4
127 %argc.addr = alloca i32, align 4
128 %argv.addr = alloca i8**, align 8
129 %loop = alloca i32, align 4
130 store i32 0, i32* %retval
131 store i32 0, i32* %loop, align 4
135 %0 = load i32* %loop, align 4
136 %cmp = icmp slt i32 %0, 4000
137 br i1 %cmp, label %for.body, label %for.end
138 ; CHECK: br i1 %cmp, label %for.body, label %for.end, !prof !4
141 %1 = load i32* %loop, align 4
142 %call = call i32 @func_switch(i32 %1)
143 %2 = load i32* %loop, align 4
144 %call1 = call i32 @func_switch_switch(i32 %2)
148 %3 = load i32* %loop, align 4
149 %inc = add nsw i32 %3, 1
150 store i32 %inc, i32* %loop, align 4
157 ; CHECK: !0 = metadata !{metadata !"branch_weights", i32 1000, i32 1000, i32 1000, i32 1000}
158 ; CHECK: !1 = metadata !{metadata !"branch_weights", i32 0, i32 2000, i32 2000}
159 ; CHECK: !2 = metadata !{metadata !"branch_weights", i32 0, i32 1000, i32 0, i32 1000}
160 ; CHECK: !3 = metadata !{metadata !"branch_weights", i32 1000, i32 0, i32 1000, i32 0}
161 ; CHECK: !4 = metadata !{metadata !"branch_weights", i32 4000, i32 1}