1 ; RUN: opt < %s -codegenprepare -S | FileCheck %s
2 ; RUN: llc < %s | FileCheck --check-prefix=ASM1 %s
3 ; RUN: llc < %s -function-sections | FileCheck --check-prefix=ASM2 %s
5 target triple = "x86_64-pc-linux-gnu"
7 ; This tests that hot/cold functions get correct section prefix assigned
9 ; CHECK: hot_func1{{.*}}!section_prefix ![[HOT_ID:[0-9]+]]
10 ; ASM1: .section .text.hot.,"ax",@progbits
11 ; ASM2: .section .text.hot.hot_func1,"ax",@progbits
13 define void @hot_func1() !prof !15 {
17 ; CHECK: hot_func2{{.*}}!section_prefix ![[HOT_ID:[0-9]+]]
18 ; Entry is cold but inner block is hot
19 define void @hot_func2(i32 %n) !prof !16 {
21 %n.addr = alloca i32, align 4
22 %i = alloca i32, align 4
23 store i32 %n, i32* %n.addr, align 4
24 store i32 0, i32* %i, align 4
28 %0 = load i32, i32* %i, align 4
29 %1 = load i32, i32* %n.addr, align 4
30 %cmp = icmp slt i32 %0, %1
31 br i1 %cmp, label %for.body, label %for.end, !prof !19
34 %2 = load i32, i32* %i, align 4
35 %inc = add nsw i32 %2, 1
36 store i32 %inc, i32* %i, align 4
43 ; For instrumentation based PGO, we should only look at block counts,
44 ; not call site VP metadata (which can exist on value profiled memcpy,
45 ; or possibly left behind after static analysis based devirtualization).
46 ; CHECK: cold_func1{{.*}}!section_prefix ![[COLD_ID:[0-9]+]]
47 ; ASM1: .section .text.unlikely.,"ax",@progbits
48 ; ASM2: .section .text.unlikely.cold_func1,"ax",@progbits
49 define void @cold_func1() !prof !16 {
50 call void @hot_func1(), !prof !17
51 call void @hot_func1(), !prof !17
55 ; CHECK: cold_func2{{.*}}!section_prefix ![[COLD_ID]]
56 define void @cold_func2() !prof !16 {
57 call void @hot_func1(), !prof !17
58 call void @hot_func1(), !prof !18
59 call void @hot_func1(), !prof !18
63 ; CHECK: cold_func3{{.*}}!section_prefix ![[COLD_ID]]
64 define void @cold_func3() !prof !16 {
65 call void @hot_func1(), !prof !18
69 ; CHECK: ![[HOT_ID]] = !{!"function_section_prefix", !"hot"}
70 ; CHECK: ![[COLD_ID]] = !{!"function_section_prefix", !"unlikely"}
71 !llvm.module.flags = !{!1}
72 !1 = !{i32 1, !"ProfileSummary", !2}
73 !2 = !{!3, !4, !5, !6, !7, !8, !9, !10}
74 !3 = !{!"ProfileFormat", !"InstrProf"}
75 !4 = !{!"TotalCount", i64 10000}
76 !5 = !{!"MaxCount", i64 1000}
77 !6 = !{!"MaxInternalCount", i64 1}
78 !7 = !{!"MaxFunctionCount", i64 1000}
79 !8 = !{!"NumCounts", i64 3}
80 !9 = !{!"NumFunctions", i64 3}
81 !10 = !{!"DetailedSummary", !11}
82 !11 = !{!12, !13, !14}
83 !12 = !{i32 10000, i64 100, i32 1}
84 !13 = !{i32 999000, i64 100, i32 1}
85 !14 = !{i32 999999, i64 1, i32 2}
86 !15 = !{!"function_entry_count", i64 1000}
87 !16 = !{!"function_entry_count", i64 1}
88 !17 = !{!"branch_weights", i32 80}
89 !18 = !{!"branch_weights", i32 1}
90 !19 = !{!"branch_weights", i32 1000, i32 1}