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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
;; Comments for RUN command options
; 1. `-relocation-model=pic` -> `hot_relro_array` and `cold_relro_array` are
; placed in the .data.rel.ro-prefixed section.
; 2. `-data-sections=true -unique-section-names=false` -> data sections are
; uniqufied by variable names.
;
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -relocation-model=pic \
; RUN: -partition-static-data-sections=true \
; RUN: -data-sections=true -unique-section-names=false \
; RUN: %s -o - 2>&1 | FileCheck %s --check-prefixes=UNIQ,COMMON --dump-input=always
; For @.str and @.str.1
; COMMON: .type .L.str,@object
; UNIQ-NEXT: .section .rodata.str1.1.hot.,"aMS",@progbits,1
; COMMON-NEXT: .L.str:
; COMMON-NEXT: "hot\t"
; COMMON: .L.str.1:
; COMMON-NEXT: "%d\t%d\t%d\n"
; For @hot_relro_array
; COMMON: .type hot_relro_array,@object
; UNIQ-NEXT: .section .data.rel.ro.hot.,"aw",@progbits,unique,1
; For @external_hot_data, which is accessed by {cold_func, unprofiled_func, hot_func}.
; COMMON: .type external_hot_data,@object
; UNIQ-NEXT: .section .data.hot.,"aw",@progbits,unique,2
; For @hot_bss, which is accessed by {unprofiled_func, hot_func}.
; COMMON: .type hot_bss,@object
; UNIQ-NEXT: .section .bss.hot.,"aw",@nobits,unique,3
; For @.str.2
; COMMON: .type .L.str.2,@object
; UNIQ-NEXT: .section .rodata.str1.1.unlikely.,"aMS",@progbits,1
; COMMON-NEXT: .L.str.2:
; COMMON-NEXT: "cold%d\t%d\t%d\n"
; For @cold_bss
; COMMON: .type cold_bss,@object
; UNIQ-NEXT: .section .bss.unlikely.,"aw",@nobits,unique,4
; For @cold_data
; COMMON: .type cold_data,@object
; UNIQ-NEXT: .section .data.unlikely.,"aw",@progbits,unique,5
; For @cold_data_custom_foo_section
; It has an explicit section 'foo' and shouldn't have hot or unlikely suffix.
; COMMON: .type cold_data_custom_foo_section,@object
; UNIQ-NEXT: .section foo,"aw",@progbits
; For @cold_relro_array
; COMMON: .type cold_relro_array,@object
; UNIQ-NEXT: .section .data.rel.ro.unlikely.,"aw",@progbits,unique,6
; @bss2 and @data3 are indirectly accessed via @hot_relro_array and
; @cold_relro_array, and actually hot due to accesses via @hot_relro_array.
; Under the hood, the static data splitter pass analyzes accesses from code but
; won't aggressively propgate the hotness of @hot_relro_array into the array
; elements -- instead, this pass reconciles the hotness information from both
; global variable section prefix and PGO counters.
; @bss2 has a section prefix 'hot' in the IR. StaticDataProfileInfo reconciles
; it into a hot prefix.
; COMMON: .type bss2,@object
; UNIQ-NEXT: .section .bss.hot.,"aw",@nobits,unique,7
; @data3 doesn't have data access profile coverage and thereby doesn't have a
; section prefix. PGO counter analysis categorizes it as cold, so it will have
; section name `.data.unlikely`.
; COMMON: .type data3,@object
; UNIQ-NEXT: .section .data,"aw",@progbits,unique,8
; For @data_with_unknown_hotness
; COMMON: .type .Ldata_with_unknown_hotness,@object # @data_with_unknown_hotness
; UNIQ: .section .data,"aw",@progbits,unique,9
; For @hot_data_custom_bar_section
; It has an explicit section attribute 'var' and shouldn't have hot or unlikely suffix.
; COMMON: .type hot_data_custom_bar_section,@object
; UNIQ: .section bar,"aw",@progbits
; For @external_cold_bss
; COMMON: .type external_cold_bss,@object
; UNIQ-NEXT: .section .bss,"aw",@nobits,unique,
@.str = private unnamed_addr constant [5 x i8] c"hot\09\00", align 1
@.str.1 = private unnamed_addr constant [10 x i8] c"%d\09%d\09%d\0A\00", align 1
@hot_relro_array = internal constant [2 x ptr] [ptr @bss2, ptr @data3]
@external_hot_data = global i32 5, !section_prefix !17
@hot_bss = internal global i32 0
@.str.2 = private unnamed_addr constant [14 x i8] c"cold%d\09%d\09%d\0A\00", align 1
@cold_bss = internal global i32 0, !section_prefix !18
@cold_data = internal global i32 4, !section_prefix !18
@cold_data_custom_foo_section = internal global i32 100, section "foo"
@cold_relro_array = internal constant [2 x ptr] [ptr @data3, ptr @bss2], !section_prefix !18
@bss2 = internal global i32 0, !section_prefix !17
@data3 = internal global i32 3
@data_with_unknown_hotness = private global i32 5
@hot_data_custom_bar_section = internal global i32 101 #0
@external_cold_bss = global i32 0
define void @cold_func(i32 %0) !prof !15 {
%2 = load i32, ptr @cold_bss
%3 = load i32, ptr @cold_data
%4 = srem i32 %0, 2
%5 = sext i32 %4 to i64
%6 = getelementptr inbounds [2 x ptr], ptr @cold_relro_array, i64 0, i64 %5
%7 = load ptr, ptr %6
%8 = load i32, ptr %7
%9 = load i32, ptr @data_with_unknown_hotness
%11 = load i32, ptr @external_hot_data
%12 = load i32, ptr @cold_data_custom_foo_section
%val = load i32, ptr @external_cold_bss
%13 = call i32 (...) @func_taking_arbitrary_param(ptr @.str.2, i32 %2, i32 %3, i32 %8, i32 %9, i32 %11, i32 %12, i32 %val)
ret void
}
define i32 @unprofiled_func() {
%a = load i32, ptr @data_with_unknown_hotness
%b = load i32, ptr @external_hot_data
%c = load i32, ptr @hot_bss
%ret = call i32 (...) @func_taking_arbitrary_param(i32 %a, i32 %b, i32 %c)
ret i32 %ret
}
define void @hot_func(i32 %0) !prof !14 {
%2 = call i32 (...) @func_taking_arbitrary_param(ptr @.str)
%3 = srem i32 %0, 2
%4 = sext i32 %3 to i64
%5 = getelementptr inbounds [2 x ptr], ptr @hot_relro_array, i64 0, i64 %4
%6 = load ptr, ptr %5
%7 = load i32, ptr %6
%8 = load i32, ptr @external_hot_data
%9 = load i32, ptr @hot_bss
%10 = load i32, ptr @hot_data_custom_bar_section
%11 = call i32 (...) @func_taking_arbitrary_param(ptr @.str.1, i32 %7, i32 %8, i32 %9, i32 %10)
ret void
}
declare i32 @func_taking_arbitrary_param(...)
attributes #0 = {"data-section"="bar"}
!llvm.module.flags = !{!0, !1}
!0 = !{i32 2, !"HasDataAccessProf", i32 1}
!1 = !{i32 1, !"ProfileSummary", !2}
!2 = !{!3, !4, !5, !6, !7, !8, !9, !10}
!3 = !{!"ProfileFormat", !"InstrProf"}
!4 = !{!"TotalCount", i64 1460183}
!5 = !{!"MaxCount", i64 849024}
!6 = !{!"MaxInternalCount", i64 32769}
!7 = !{!"MaxFunctionCount", i64 849024}
!8 = !{!"NumCounts", i64 23627}
!9 = !{!"NumFunctions", i64 3271}
!10 = !{!"DetailedSummary", !11}
!11 = !{!12, !13}
!12 = !{i32 990000, i64 166, i32 73}
!13 = !{i32 999999, i64 3, i32 1443}
!14 = !{!"function_entry_count", i64 100000}
!15 = !{!"function_entry_count", i64 1}
!16 = !{!"branch_weights", i32 1, i32 99999}
!17 = !{!"section_prefix", !"hot"}
!18 = !{!"section_prefix", !"unlikely"}
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