#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/LineIterator.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
using namespace llvm;
if (ProcessingMapDef != SecName.startswith(".maps"))
continue;
+ // Create a .rodata datasec if the global variable is an initialized
+ // constant with private linkage and if it won't be in .rodata.str<#>
+ // and .rodata.cst<#> sections.
+ if (SecName == ".rodata" && Global.hasPrivateLinkage() &&
+ DataSecEntries.find(std::string(SecName)) == DataSecEntries.end()) {
+ SectionKind GVKind =
+ TargetLoweringObjectFile::getKindForGlobal(&Global, Asm->TM);
+ // skip .rodata.str<#> and .rodata.cst<#> sections
+ if (!GVKind.isMergeableCString() && !GVKind.isMergeableConst()) {
+ DataSecEntries[std::string(SecName)] =
+ std::make_unique<BTFKindDataSec>(Asm, std::string(SecName));
+ }
+ }
+
SmallVector<DIGlobalVariableExpression *, 1> GVs;
Global.getDebugInfo(GVs);
--- /dev/null
+; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
+; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
+;
+; Source:
+; void foo(const void *);
+; int test() {
+; const char *str = "abcd";
+; const struct {
+; unsigned a[4];
+; } val = { .a = {2, 3, 4, 5} };
+; foo(str);
+; foo(&val);
+; return 0;
+; }
+; Compilation flag:
+; clang -target bpf -O2 -g -S -emit-llvm t.c
+
+%struct.anon = type { [4 x i32] }
+
+@.str = private unnamed_addr constant [5 x i8] c"abcd\00", align 1
+@__const.test.val = private unnamed_addr constant %struct.anon { [4 x i32] [i32 2, i32 3, i32 4, i32 5] }, align 4
+
+; Function Attrs: nounwind
+define dso_local i32 @test() local_unnamed_addr #0 !dbg !7 {
+entry:
+ %val = alloca %struct.anon, align 4
+ call void @llvm.dbg.value(metadata i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), metadata !12, metadata !DIExpression()), !dbg !25
+ %0 = bitcast %struct.anon* %val to i8*, !dbg !26
+ call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %0) #4, !dbg !26
+ call void @llvm.dbg.declare(metadata %struct.anon* %val, metadata !16, metadata !DIExpression()), !dbg !27
+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(16) %0, i8* nonnull align 4 dereferenceable(16) bitcast (%struct.anon* @__const.test.val to i8*), i64 16, i1 false), !dbg !27
+ tail call void @foo(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0)) #4, !dbg !28
+ call void @foo(i8* nonnull %0) #4, !dbg !29
+ call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %0) #4, !dbg !30
+ ret i32 0, !dbg !31
+}
+
+; the initial value of "str" is stored in section .rodata.str1.1
+; the initial value of "val" is stored in section .rodata.cst16
+; CHECK-NOT: BTF_KIND_DATASEC
+
+; Function Attrs: argmemonly nounwind willreturn
+declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
+
+; Function Attrs: nounwind readnone speculatable willreturn
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
+
+; Function Attrs: argmemonly nounwind willreturn
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #1
+
+declare !dbg !32 dso_local void @foo(i8*) local_unnamed_addr #3
+
+; Function Attrs: argmemonly nounwind willreturn
+declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
+
+; Function Attrs: nounwind readnone speculatable willreturn
+declare void @llvm.dbg.value(metadata, metadata, metadata) #2
+
+attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { argmemonly nounwind willreturn }
+attributes #2 = { nounwind readnone speculatable willreturn }
+attributes #3 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #4 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4, !5}
+!llvm.ident = !{!6}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0 (https://github.com/llvm/llvm-project.git 1e92cffe18a07c12042b57504dfa7fb709b833c8)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
+!1 = !DIFile(filename: "t.c", directory: "/tmp/home/yhs/tmp")
+!2 = !{}
+!3 = !{i32 7, !"Dwarf Version", i32 4}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!5 = !{i32 1, !"wchar_size", i32 4}
+!6 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project.git 1e92cffe18a07c12042b57504dfa7fb709b833c8)"}
+!7 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
+!8 = !DISubroutineType(types: !9)
+!9 = !{!10}
+!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!11 = !{!12, !16}
+!12 = !DILocalVariable(name: "str", scope: !7, file: !1, line: 3, type: !13)
+!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64)
+!14 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !15)
+!15 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!16 = !DILocalVariable(name: "val", scope: !7, file: !1, line: 6, type: !17)
+!17 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !18)
+!18 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !7, file: !1, line: 4, size: 128, elements: !19)
+!19 = !{!20}
+!20 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !18, file: !1, line: 5, baseType: !21, size: 128)
+!21 = !DICompositeType(tag: DW_TAG_array_type, baseType: !22, size: 128, elements: !23)
+!22 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
+!23 = !{!24}
+!24 = !DISubrange(count: 4)
+!25 = !DILocation(line: 0, scope: !7)
+!26 = !DILocation(line: 4, column: 3, scope: !7)
+!27 = !DILocation(line: 6, column: 5, scope: !7)
+!28 = !DILocation(line: 7, column: 3, scope: !7)
+!29 = !DILocation(line: 8, column: 3, scope: !7)
+!30 = !DILocation(line: 10, column: 1, scope: !7)
+!31 = !DILocation(line: 9, column: 3, scope: !7)
+!32 = !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !33, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
+!33 = !DISubroutineType(types: !34)
+!34 = !{null, !35}
+!35 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !36, size: 64)
+!36 = !DIDerivedType(tag: DW_TAG_const_type, baseType: null)
--- /dev/null
+; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
+; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
+;
+; Source:
+; void foo(const void *);
+; int test() {
+; const struct {
+; unsigned a[4];
+; char b;
+; } val = { .a = {2, 3, 4, 5}, .b = 4 };
+; foo(&val);
+; return 0;
+; }
+; Compilation flag:
+; clang -target bpf -O2 -g -S -emit-llvm t.c
+
+%struct.anon = type { [4 x i32], i8 }
+
+@__const.test.val = private unnamed_addr constant %struct.anon { [4 x i32] [i32 2, i32 3, i32 4, i32 5], i8 4 }, align 4
+
+; Function Attrs: nounwind
+define dso_local i32 @test() local_unnamed_addr #0 !dbg !7 {
+entry:
+ %val = alloca %struct.anon, align 4
+ %0 = bitcast %struct.anon* %val to i8*, !dbg !23
+ call void @llvm.lifetime.start.p0i8(i64 20, i8* nonnull %0) #4, !dbg !23
+ call void @llvm.dbg.declare(metadata %struct.anon* %val, metadata !12, metadata !DIExpression()), !dbg !24
+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(20) %0, i8* nonnull align 4 dereferenceable(20) bitcast (%struct.anon* @__const.test.val to i8*), i64 20, i1 false), !dbg !24
+ call void @foo(i8* nonnull %0) #4, !dbg !25
+ call void @llvm.lifetime.end.p0i8(i64 20, i8* nonnull %0) #4, !dbg !26
+ ret i32 0, !dbg !27
+}
+
+; the init value of local variable "val" is stored in .rodata section
+; CHECK: .long 42 # BTF_KIND_DATASEC
+; CHECK-NEXT: .long 251658240 # 0xf000000
+; CHECK-NEXT: .long 0
+
+; CHECK: .ascii ".rodata" # string offset=42
+
+; Function Attrs: argmemonly nounwind willreturn
+declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
+
+; Function Attrs: nounwind readnone speculatable willreturn
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
+
+; Function Attrs: argmemonly nounwind willreturn
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #1
+
+declare !dbg !28 dso_local void @foo(i8*) local_unnamed_addr #3
+
+; Function Attrs: argmemonly nounwind willreturn
+declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
+
+attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { argmemonly nounwind willreturn }
+attributes #2 = { nounwind readnone speculatable willreturn }
+attributes #3 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #4 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4, !5}
+!llvm.ident = !{!6}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0 (https://github.com/llvm/llvm-project.git 1e92cffe18a07c12042b57504dfa7fb709b833c8)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
+!1 = !DIFile(filename: "t.c", directory: "/tmp/home/yhs/tmp")
+!2 = !{}
+!3 = !{i32 7, !"Dwarf Version", i32 4}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!5 = !{i32 1, !"wchar_size", i32 4}
+!6 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project.git 1e92cffe18a07c12042b57504dfa7fb709b833c8)"}
+!7 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
+!8 = !DISubroutineType(types: !9)
+!9 = !{!10}
+!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!11 = !{!12}
+!12 = !DILocalVariable(name: "val", scope: !7, file: !1, line: 6, type: !13)
+!13 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !14)
+!14 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !7, file: !1, line: 3, size: 160, elements: !15)
+!15 = !{!16, !21}
+!16 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !14, file: !1, line: 4, baseType: !17, size: 128)
+!17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, size: 128, elements: !19)
+!18 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
+!19 = !{!20}
+!20 = !DISubrange(count: 4)
+!21 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !14, file: !1, line: 5, baseType: !22, size: 8, offset: 128)
+!22 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!23 = !DILocation(line: 3, column: 3, scope: !7)
+!24 = !DILocation(line: 6, column: 5, scope: !7)
+!25 = !DILocation(line: 7, column: 3, scope: !7)
+!26 = !DILocation(line: 9, column: 1, scope: !7)
+!27 = !DILocation(line: 8, column: 3, scope: !7)
+!28 = !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !29, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
+!29 = !DISubroutineType(types: !30)
+!30 = !{null, !31}
+!31 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !32, size: 64)
+!32 = !DIDerivedType(tag: DW_TAG_const_type, baseType: null)