[llvm] r349207 - DebugInfo: Avoid using split DWARF when the split unit would be empty.
Galina Kistanova via llvm-commits
llvm-commits at lists.llvm.org
Mon Dec 17 12:43:38 PST 2018
Hello David,
It looks like this commit broke test to couple lto builders:
The builders were already broken on build step and did not reach test
steps. And did not send notifications also on this.
http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu
http://lab.llvm.org:8011/builders/clang-with-thin-lto-ubuntu
. . .
Failing Tests (1):
LLVM :: tools/gold/X86/split-dwarf.ll
Please have a look?
Thanks
Galina
On Fri, Dec 14, 2018 at 2:47 PM David Blaikie via llvm-commits <
llvm-commits at lists.llvm.org> wrote:
> Author: dblaikie
> Date: Fri Dec 14 14:44:46 2018
> New Revision: 349207
>
> URL: http://llvm.org/viewvc/llvm-project?rev=349207&view=rev
> Log:
> DebugInfo: Avoid using split DWARF when the split unit would be empty.
>
> In ThinLTO many split CUs may be effectively empty because of the lack
> of support for cross-unit references in split DWARF.
>
> Using a split unit in those cases is just a waste/overhead - and turned
> out to be one contributor to a significant symbolizer performance issue
> when global variable debug info was being imported (see r348416 for the
> primary fix) due to symbolizers seeing CUs with no ranges, assuming
> there might still be addresses covered and walking into the split CU to
> see if there are any ranges (when that split CU was in a DWP file, that
> meant loading the DWP and its index, the index was extra large because
> of all these fractured/empty CUs... and so was very expensive to load).
>
> (the 3rd fix which will follow, is to assume that a CU with no ranges is
> empty rather than merely missing its CU level range data - and to not
> walk into its DIEs (split or otherwise) in search of address information
> that is generally not present)
>
> Modified:
> llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
> llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h
> llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.cpp
> llvm/trunk/test/DebugInfo/X86/fission-cu.ll
> llvm/trunk/test/DebugInfo/X86/fission-ranges.ll
> llvm/trunk/test/DebugInfo/X86/string-offsets-table-order.ll
> llvm/trunk/test/DebugInfo/X86/string-offsets-table.ll
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp?rev=349207&r1=349206&r2=349207&view=diff
>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp Fri Dec 14 14:44:46
> 2018
> @@ -568,25 +568,10 @@ void DwarfDebug::addGnuPubAttributes(Dwa
> U.addFlag(D, dwarf::DW_AT_GNU_pubnames);
> }
>
> -// Create new DwarfCompileUnit for the given metadata node with tag
> -// DW_TAG_compile_unit.
> -DwarfCompileUnit &
> -DwarfDebug::getOrCreateDwarfCompileUnit(const DICompileUnit *DIUnit) {
> - if (auto *CU = CUMap.lookup(DIUnit))
> - return *CU;
> - StringRef FN = DIUnit->getFilename();
> - CompilationDir = DIUnit->getDirectory();
> -
> - auto OwnedUnit = llvm::make_unique<DwarfCompileUnit>(
> - InfoHolder.getUnits().size(), DIUnit, Asm, this, &InfoHolder);
> - DwarfCompileUnit &NewCU = *OwnedUnit;
> +void DwarfDebug::finishUnitAttributes(const DICompileUnit *DIUnit,
> + DwarfCompileUnit &NewCU) {
> DIE &Die = NewCU.getUnitDie();
> - InfoHolder.addUnit(std::move(OwnedUnit));
> - if (useSplitDwarf()) {
> - NewCU.setSkeleton(constructSkeletonCU(NewCU));
> - NewCU.addString(Die, dwarf::DW_AT_GNU_dwo_name,
> - Asm->TM.Options.MCOptions.SplitDwarfFile);
> - }
> + StringRef FN = DIUnit->getFilename();
>
> for (auto *IE : DIUnit->getImportedEntities())
> NewCU.addImportedEntity(IE);
> @@ -640,11 +625,6 @@ DwarfDebug::getOrCreateDwarfCompileUnit(
> dwarf::DW_FORM_data1, RVer);
> }
>
> - if (useSplitDwarf())
> - NewCU.setSection(Asm->getObjFileLowering().getDwarfInfoDWOSection());
> - else
> - NewCU.setSection(Asm->getObjFileLowering().getDwarfInfoSection());
> -
> if (DIUnit->getDWOId()) {
> // This CU is either a clang module DWO or a skeleton CU.
> NewCU.addUInt(Die, dwarf::DW_AT_GNU_dwo_id, dwarf::DW_FORM_data8,
> @@ -654,9 +634,31 @@ DwarfDebug::getOrCreateDwarfCompileUnit(
> NewCU.addString(Die, dwarf::DW_AT_GNU_dwo_name,
> DIUnit->getSplitDebugFilename());
> }
> +}
> +// Create new DwarfCompileUnit for the given metadata node with tag
> +// DW_TAG_compile_unit.
> +DwarfCompileUnit &
> +DwarfDebug::getOrCreateDwarfCompileUnit(const DICompileUnit *DIUnit) {
> + if (auto *CU = CUMap.lookup(DIUnit))
> + return *CU;
> +
> + CompilationDir = DIUnit->getDirectory();
> +
> + auto OwnedUnit = llvm::make_unique<DwarfCompileUnit>(
> + InfoHolder.getUnits().size(), DIUnit, Asm, this, &InfoHolder);
> + DwarfCompileUnit &NewCU = *OwnedUnit;
> + InfoHolder.addUnit(std::move(OwnedUnit));
> +
> + if (useSplitDwarf()) {
> + NewCU.setSkeleton(constructSkeletonCU(NewCU));
> + NewCU.setSection(Asm->getObjFileLowering().getDwarfInfoDWOSection());
> + } else {
> + finishUnitAttributes(DIUnit, NewCU);
> + NewCU.setSection(Asm->getObjFileLowering().getDwarfInfoSection());
> + }
>
> CUMap.insert({DIUnit, &NewCU});
> - CUDieMap.insert({&Die, &NewCU});
> + CUDieMap.insert({&NewCU.getUnitDie(), &NewCU});
> return NewCU;
> }
>
> @@ -851,7 +853,12 @@ void DwarfDebug::finalizeModuleInfo() {
> // If we're splitting the dwarf out now that we've got the entire
> // CU then add the dwo id to it.
> auto *SkCU = TheCU.getSkeleton();
> - if (useSplitDwarf()) {
> + if (useSplitDwarf() && !empty(TheCU.getUnitDie().children())) {
> + finishUnitAttributes(TheCU.getCUNode(), TheCU);
> + TheCU.addString(TheCU.getUnitDie(), dwarf::DW_AT_GNU_dwo_name,
> + Asm->TM.Options.MCOptions.SplitDwarfFile);
> + SkCU->addString(SkCU->getUnitDie(), dwarf::DW_AT_GNU_dwo_name,
> + Asm->TM.Options.MCOptions.SplitDwarfFile);
> // Emit a unique identifier for this CU.
> uint64_t ID =
> DIEHash(Asm).computeCUSignature(DWOName, TheCU.getUnitDie());
> @@ -870,6 +877,8 @@ void DwarfDebug::finalizeModuleInfo() {
> SkCU->addSectionLabel(SkCU->getUnitDie(),
> dwarf::DW_AT_GNU_ranges_base,
> Sym, Sym);
> }
> + } else if (SkCU) {
> + finishUnitAttributes(SkCU->getCUNode(), *SkCU);
> }
>
> // If we have code split among multiple sections or non-contiguous
> @@ -882,7 +891,9 @@ void DwarfDebug::finalizeModuleInfo() {
>
> // We don't keep track of which addresses are used in which CU so this
> // is a bit pessimistic under LTO.
> - if (!AddrPool.isEmpty())
> + if (!AddrPool.isEmpty() &&
> + (getDwarfVersion() >= 5 ||
> + (SkCU && !empty(TheCU.getUnitDie().children()))))
> U.addAddrTableBase();
>
> if (unsigned NumRanges = TheCU.getRanges().size()) {
> @@ -2483,8 +2494,6 @@ void DwarfDebug::emitDebugMacinfo() {
>
> void DwarfDebug::initSkeletonUnit(const DwarfUnit &U, DIE &Die,
> std::unique_ptr<DwarfCompileUnit> NewU)
> {
> - NewU->addString(Die, dwarf::DW_AT_GNU_dwo_name,
> - Asm->TM.Options.MCOptions.SplitDwarfFile);
>
> if (!CompilationDir.empty())
> NewU->addString(Die, dwarf::DW_AT_comp_dir, CompilationDir);
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h?rev=349207&r1=349206&r2=349207&view=diff
>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h Fri Dec 14 14:44:46 2018
> @@ -540,6 +540,8 @@ class DwarfDebug : public DebugHandlerBa
> /// Create new DwarfCompileUnit for the given metadata node with tag
> /// DW_TAG_compile_unit.
> DwarfCompileUnit &getOrCreateDwarfCompileUnit(const DICompileUnit
> *DIUnit);
> + void finishUnitAttributes(const DICompileUnit *DIUnit,
> + DwarfCompileUnit &NewCU);
>
> /// Construct imported_module or imported_declaration DIE.
> void constructAndAddImportedEntityDIE(DwarfCompileUnit &TheCU,
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.cpp?rev=349207&r1=349206&r2=349207&view=diff
>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.cpp (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfFile.cpp Fri Dec 14 14:44:46
> 2018
> @@ -39,13 +39,14 @@ void DwarfFile::emitUnit(DwarfUnit *TheU
> if (TheU->getCUNode()->isDebugDirectivesOnly())
> return;
>
> - DIE &Die = TheU->getUnitDie();
> - MCSection *USection = TheU->getSection();
> - Asm->OutStreamer->SwitchSection(USection);
> + MCSection *S = TheU->getSection();
>
> - TheU->emitHeader(UseOffsets);
> + if (!S)
> + return;
>
> - Asm->emitDwarfDIE(Die);
> + Asm->OutStreamer->SwitchSection(S);
> + TheU->emitHeader(UseOffsets);
> + Asm->emitDwarfDIE(TheU->getUnitDie());
> }
>
> // Compute the size and offset for each DIE.
>
> Modified: llvm/trunk/test/DebugInfo/X86/fission-cu.ll
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/X86/fission-cu.ll?rev=349207&r1=349206&r2=349207&view=diff
>
> ==============================================================================
> --- llvm/trunk/test/DebugInfo/X86/fission-cu.ll (original)
> +++ llvm/trunk/test/DebugInfo/X86/fission-cu.ll Fri Dec 14 14:44:46 2018
> @@ -25,18 +25,18 @@ source_filename = "test/DebugInfo/X86/fi
> ; CHECK: Abbrev table for offset: 0x00000000
> ; CHECK: [1] DW_TAG_compile_unit DW_CHILDREN_no
> ; CHECK: DW_AT_stmt_list DW_FORM_sec_offset
> -; CHECK: DW_AT_GNU_dwo_name DW_FORM_strp
> ; CHECK: DW_AT_comp_dir DW_FORM_strp
> +; CHECK: DW_AT_GNU_dwo_name DW_FORM_strp
> ; CHECK: DW_AT_GNU_dwo_id DW_FORM_data8
>
> ; Check that we're using the right forms.
> ; CHECK: .debug_abbrev.dwo contents:
> ; CHECK: Abbrev table for offset: 0x00000000
> ; CHECK: [1] DW_TAG_compile_unit DW_CHILDREN_yes
> -; CHECK: DW_AT_GNU_dwo_name DW_FORM_GNU_str_index
> ; CHECK: DW_AT_producer DW_FORM_GNU_str_index
> ; CHECK: DW_AT_language DW_FORM_data2
> ; CHECK: DW_AT_name DW_FORM_GNU_str_index
> +; CHECK: DW_AT_GNU_dwo_name DW_FORM_GNU_str_index
> ; CHECK-NOT: DW_AT_low_pc
> ; CHECK-NOT: DW_AT_stmt_list
> ; CHECK-NOT: DW_AT_comp_dir
> @@ -58,48 +58,48 @@ source_filename = "test/DebugInfo/X86/fi
> ; CHECK: .debug_info contents:
> ; CHECK: DW_TAG_compile_unit
> ; CHECK-NEXT: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
> -; CHECK-NEXT: DW_AT_GNU_dwo_name [DW_FORM_strp] ( .debug_str[0x00000000]
> = "baz.dwo")
> -; CHECK-NEXT: DW_AT_comp_dir [DW_FORM_strp] ( .debug_str[0x00000008]
> = "/usr/local/google/home/echristo/tmp")
> +; CHECK-NEXT: DW_AT_comp_dir [DW_FORM_strp] ( .debug_str[0x00000000]
> = "/usr/local/google/home/echristo/tmp")
> +; CHECK-NEXT: DW_AT_GNU_dwo_name [DW_FORM_strp] ( .debug_str[0x00000024]
> = "baz.dwo")
> ; CHECK-NEXT: DW_AT_GNU_dwo_id [DW_FORM_data8] (0x1f1f859683d49324)
>
> ; Check that the rest of the compile units have information.
> ; CHECK: .debug_info.dwo contents:
> ; CHECK: DW_TAG_compile_unit
> -; CHECK: DW_AT_GNU_dwo_name [DW_FORM_GNU_str_index] ( indexed (00000000)
> string = "baz.dwo")
> -; CHECK: DW_AT_producer [DW_FORM_GNU_str_index] ( indexed (00000001)
> string = "clang version 3.3 (trunk 169021) (llvm/trunk 169020)")
> +; CHECK: DW_AT_producer [DW_FORM_GNU_str_index] ( indexed (00000002)
> string = "clang version 3.3 (trunk 169021) (llvm/trunk 169020)")
> ; CHECK: DW_AT_language [DW_FORM_data2] (DW_LANG_C99)
> -; CHECK: DW_AT_name [DW_FORM_GNU_str_index] ( indexed (00000002)
> string = "baz.c")
> +; CHECK: DW_AT_name [DW_FORM_GNU_str_index] ( indexed (00000003)
> string = "baz.c")
> +; CHECK: DW_AT_GNU_dwo_name [DW_FORM_GNU_str_index] ( indexed (00000004)
> string = "baz.dwo")
> ; CHECK-NOT: DW_AT_low_pc
> ; CHECK-NOT: DW_AT_stmt_list
> ; CHECK-NOT: DW_AT_comp_dir
> ; CHECK: DW_AT_GNU_dwo_id [DW_FORM_data8] (0x1f1f859683d49324)
> ; CHECK: DW_TAG_variable
> -; CHECK: DW_AT_name [DW_FORM_GNU_str_index] ( indexed (00000003)
> string = "a")
> +; CHECK: DW_AT_name [DW_FORM_GNU_str_index] ( indexed (00000000)
> string = "a")
> ; CHECK: DW_AT_type [DW_FORM_ref4] (cu + 0x{{[0-9a-f]*}} =>
> {[[TYPE:0x[0-9a-f]*]]}
> ; CHECK: DW_AT_external [DW_FORM_flag_present] (true)
> ; CHECK: DW_AT_decl_file [DW_FORM_data1] (0x01)
> ; CHECK: DW_AT_decl_line [DW_FORM_data1] (1)
> ; CHECK: DW_AT_location [DW_FORM_exprloc] (DW_OP_GNU_addr_index 0x0)
> ; CHECK: [[TYPE]]: DW_TAG_base_type
> -; CHECK: DW_AT_name [DW_FORM_GNU_str_index] ( indexed (00000004)
> string = "int")
> +; CHECK: DW_AT_name [DW_FORM_GNU_str_index] ( indexed (00000001)
> string = "int")
>
> ; CHECK: .debug_str contents:
> -; CHECK: 0x00000000: "baz.dwo"
> -; CHECK: 0x00000008: "/usr/local/google/home/echristo/tmp"
> +; CHECK: 0x00000000: "/usr/local/google/home/echristo/tmp"
> +; CHECK: 0x00000024: "baz.dwo"
>
> ; CHECK: .debug_str.dwo contents:
> -; CHECK: 0x00000000: "baz.dwo"
> -; CHECK: 0x00000008: "clang version 3.3 (trunk 169021) (llvm/trunk
> 169020)"
> -; CHECK: 0x0000003d: "baz.c"
> -; CHECK: 0x00000043: "a"
> -; CHECK: 0x00000045: "int"
> +; CHECK: 0x00000000: "a"
> +; CHECK: 0x00000002: "int"
> +; CHECK: 0x00000006: "clang version 3.3 (trunk 169021) (llvm/trunk
> 169020)"
> +; CHECK: 0x0000003b: "baz.c"
> +; CHECK: 0x00000041: "baz.dwo"
>
> ; CHECK: .debug_str_offsets.dwo contents:
> ; CHECK: 0x00000000: 00000000
> -; CHECK: 0x00000004: 00000008
> -; CHECK: 0x00000008: 0000003d
> -; CHECK: 0x0000000c: 00000043
> -; CHECK: 0x00000010: 00000045
> +; CHECK: 0x00000004: 00000002
> +; CHECK: 0x00000008: 00000006
> +; CHECK: 0x0000000c: 0000003b
> +; CHECK: 0x00000010: 00000041
>
> ; Object file checks
> ; For x86-64-linux we should have this set of relocations for the debug
> info section
>
> Modified: llvm/trunk/test/DebugInfo/X86/fission-ranges.ll
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/X86/fission-ranges.ll?rev=349207&r1=349206&r2=349207&view=diff
>
> ==============================================================================
> --- llvm/trunk/test/DebugInfo/X86/fission-ranges.ll (original)
> +++ llvm/trunk/test/DebugInfo/X86/fission-ranges.ll Fri Dec 14 14:44:46
> 2018
> @@ -8,8 +8,8 @@
> ; CHECK: .debug_info contents:
> ; CHECK: DW_TAG_compile_unit
> ; CHECK-NEXT: DW_AT_stmt_list
> -; CHECK-NEXT: DW_AT_GNU_dwo_name
> ; CHECK-NEXT: DW_AT_comp_dir
> +; CHECK-NEXT: DW_AT_GNU_dwo_name
> ; CHECK-NEXT: DW_AT_GNU_dwo_id
> ; CHECK-NEXT: DW_AT_GNU_ranges_base
> ; CHECK-NEXT: DW_AT_GNU_addr_base [DW_FORM_sec_offset]
> (0x00000000)
>
> Modified: llvm/trunk/test/DebugInfo/X86/string-offsets-table-order.ll
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/X86/string-offsets-table-order.ll?rev=349207&r1=349206&r2=349207&view=diff
>
> ==============================================================================
> --- llvm/trunk/test/DebugInfo/X86/string-offsets-table-order.ll (original)
> +++ llvm/trunk/test/DebugInfo/X86/string-offsets-table-order.ll Fri Dec 14
> 14:44:46 2018
> @@ -13,11 +13,11 @@
>
> ; CHECK: .debug_info contents:
> ; CHECK: DW_TAG_compile_unit
> -; CHECK: DW_AT_comp_dir [DW_FORM_strx1] ( indexed (00000001) string =
> "X3")
> +; CHECK: DW_AT_comp_dir [DW_FORM_strx1] ( indexed (00000000) string =
> "X3")
> ; CHECK: DW_TAG_compile_unit
> -; CHECK: DW_AT_comp_dir [DW_FORM_strx1] ( indexed (00000002) string =
> "X2")
> +; CHECK: DW_AT_comp_dir [DW_FORM_strx1] ( indexed (00000001) string =
> "X2")
> ; CHECK: DW_TAG_compile_unit
> -; CHECK: DW_AT_comp_dir [DW_FORM_strx1] ( indexed (00000003) string =
> "X1")
> +; CHECK: DW_AT_comp_dir [DW_FORM_strx1] ( indexed (00000002) string =
> "X1")
> ; CHECK: .debug_info.dwo contents:
>
> ; CHECK: .debug_str contents:
> @@ -27,10 +27,10 @@
>
> ; CHECK: .debug_str_offsets contents:
> ; CHECK: Format = DWARF32, Version = 5
> -; CHECK-NEXT: 00000000 "foo.dwo"
> ; CHECK-NEXT: [[X3]] "X3"
> ; CHECK-NEXT: [[X2]] "X2"
> ; CHECK-NEXT: [[X1]] "X1"
> +; CHECK-NEXT: "foo.dwo"
> ; CHECK-EMPTY:
>
>
>
> Modified: llvm/trunk/test/DebugInfo/X86/string-offsets-table.ll
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/X86/string-offsets-table.ll?rev=349207&r1=349206&r2=349207&view=diff
>
> ==============================================================================
> --- llvm/trunk/test/DebugInfo/X86/string-offsets-table.ll (original)
> +++ llvm/trunk/test/DebugInfo/X86/string-offsets-table.ll Fri Dec 14
> 14:44:46 2018
> @@ -59,8 +59,8 @@
> ; SPLIT: DW_TAG_compile_unit
> ; SPLIT-NOT: {{DW_TAG|contents:}}
> ; SPLIT: DW_AT_str_offsets_base [DW_FORM_sec_offset] (0x00000008)
> -; SPLIT: DW_AT_GNU_dwo_name [DW_FORM_strx1] ( indexed (00000000)
> string = "foo.dwo")
> -; SPLIT: DW_AT_comp_dir [DW_FORM_strx1] ( indexed (00000001) string
> = "/home/test")
> +; SPLIT: DW_AT_comp_dir [DW_FORM_strx1] ( indexed (00000000) string
> = "/home/test")
> +; SPLIT: DW_AT_GNU_dwo_name [DW_FORM_strx1] ( indexed (00000001)
> string = "foo.dwo")
>
> ; Check for the split CU in .debug_info.dwo.
> ; SPLIT: .debug_info.dwo contents:
> @@ -73,18 +73,18 @@
> ; SPLIT-NOT: contents:
> ; SPLIT: DW_TAG_enumerator
> ; SPLIT-NOT: {{DW_TAG|NULL}}
> -; SPLIT: DW_AT_name [DW_FORM_strx1] ( indexed (00000004) string =
> "a")
> +; SPLIT: DW_AT_name [DW_FORM_strx1] ( indexed (00000001) string =
> "a")
> ; SPLIT-NOT: contents:
> ; SPLIT: DW_TAG_enumerator
> ; SPLIT-NOT: {{DW_TAG|NULL}}
> -; SPLIT: DW_AT_name [DW_FORM_strx1] ( indexed (00000005) string =
> "b")
> +; SPLIT: DW_AT_name [DW_FORM_strx1] ( indexed (00000002) string =
> "b")
> ;
> ; Extract the string offsets referenced in the main file by the skeleton
> unit.
> ; SPLIT: .debug_str contents:
> -; SPLIT-NEXT: 0x00000000: "foo.dwo"
> -; SPLIT-NEXT: 0x[[STRING2SPLIT:[0-9a-f]*]]: "/home/test"
> -; SPLIT-NEXT: 0x[[STRING3SPLIT:[0-9a-f]*]]: "E"
> -; SPLIT-NEXT: 0x[[STRING4SPLIT:[0-9a-f]*]]: "glob"
> +; SPLIT-NEXT: 0x[[STRHOMETESTSPLIT:[0-9a-f]*]]: "/home/test"
> +; SPLIT-NEXT: 0x[[STRESPLIT:[0-9a-f]*]]: "E"
> +; SPLIT-NEXT: 0x[[STRGLOBSPLIT:[0-9a-f]*]]: "glob"
> +; SPLIT-NEXT: 0x[[STRFOODWOSPLIT:[0-9a-f]*]]: "foo.dwo"
> ;
> ; Extract the string offsets referenced in the .dwo file by the split
> unit.
> ; SPLIT: .debug_str.dwo contents:
> @@ -98,8 +98,8 @@
> ; referenced by the debug info.
> ; SPLIT: .debug_str_offsets contents:
> ; SPLIT-NEXT: 0x00000000: Contribution size = 12, Format = DWARF32,
> Version = 5
> -; SPLIT-NEXT: 0x00000008: 00000000 "foo.dwo"
> -; SPLIT-NEXT: 0x0000000c: [[STRING2SPLIT]] "/home/test"
> +; SPLIT-NEXT: 0x00000008: [[STRHOMETESTSPLIT]] "/home/test"
> +; SPLIT-NEXT: 0x0000000c: [[STRFOODWOSPLIT]] "foo.dwo"
> ; SPLIT-EMPTY:
>
> ; SPLIT: .debug_str_offsets.dwo contents:
>
>
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