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Remove type unit skeletons. GDB no longer needs them & this saves a heap of space.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216521 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2014-08-27 05:04:14 +00:00
parent fc03e72b4f
commit ad2a271781
2 changed files with 7 additions and 40 deletions
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23
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -2481,24 +2481,6 @@ DwarfCompileUnit &DwarfDebug::constructSkeletonCU(const DwarfCompileUnit &CU) {
return NewCU;
}
// This DIE has the following attributes: DW_AT_comp_dir, DW_AT_dwo_name,
// DW_AT_addr_base.
DwarfTypeUnit &DwarfDebug::constructSkeletonTU(DwarfTypeUnit &TU) {
DwarfCompileUnit &CU = static_cast<DwarfCompileUnit &>(
*SkeletonHolder.getUnits()[TU.getCU().getUniqueID()]);
auto OwnedUnit = make_unique<DwarfTypeUnit>(TU.getUniqueID(), CU, Asm, this,
&SkeletonHolder);
DwarfTypeUnit &NewTU = *OwnedUnit;
NewTU.setTypeSignature(TU.getTypeSignature());
NewTU.setType(nullptr);
NewTU.initSection(
Asm->getObjFileLowering().getDwarfTypesSection(TU.getTypeSignature()));
initSkeletonUnit(TU, NewTU.getUnitDie(), std::move(OwnedUnit));
return NewTU;
}
// Emit the .debug_info.dwo section for separated dwarf. This contains the
// compile units that would normally be in debug_info.
void DwarfDebug::emitDebugInfoDWO() {
@ -2621,11 +2603,8 @@ void DwarfDebug::addDwarfTypeUnitType(DwarfCompileUnit &CU,
// If the type wasn't dependent on fission addresses, finish adding the type
// and all its dependent types.
for (auto &TU : TypeUnitsToAdd) {
if (useSplitDwarf())
TU.first->setSkeleton(constructSkeletonTU(*TU.first));
for (auto &TU : TypeUnitsToAdd)
InfoHolder.addUnit(std::move(TU.first));
}
}
CU.addDIETypeSignature(RefDie, NewTU);
}

24
test/DebugInfo/X86/generate-odr-hash.ll
View File

@ -2,11 +2,11 @@
; RUN: llc < %s -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
; RUN: llvm-dwarfdump %t | FileCheck --check-prefix=CHECK --check-prefix=SINGLE %s
; RUN: llvm-readobj -s -t %t | FileCheck --check-prefix=OBJ_COMMON %s
; RUN: llvm-readobj -s -t %t | FileCheck --check-prefix=OBJ_SINGLE %s
; RUN: llc < %s -split-dwarf=Enable -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
; RUN: llvm-dwarfdump %t | FileCheck --check-prefix=CHECK --check-prefix=FISSION %s
; RUN: llvm-readobj -s -t %t | FileCheck --check-prefix=OBJ_COMMON --check-prefix=OBJ_FISSION %s
; RUN: llvm-readobj -s -t %t | FileCheck --check-prefix=OBJ_FISSION %s
; Generated from bar.cpp:
@ -74,20 +74,8 @@
; CHECK-NEXT: DW_AT_declaration
; CHECK-NEXT: DW_AT_signature {{.*}} (0xfd756cee88f8a118)
; FISSION-LABEL: .debug_types contents:
; FISSION-NOT: type_signature
; FISSION-LABEL: type_signature = 0x1d02f3be30cc5688
; FISSION: DW_TAG_type_unit
; FISSION-NEXT: DW_AT_GNU_dwo_name{{.*}}"bar.dwo"
; FISSION-NEXT: DW_AT_comp_dir{{.*}}"/tmp/dbginfo"
; FISSION-NOT: type_signature
; FISSION-LABEL: type_signature = 0xb04af47397402e77
; FISSION-NOT: type_signature
; FISSION-LABEL: type_signature = 0xfd756cee88f8a118
; FISSION-NOT: type_signature
; FISSION-LABEL: type_signature = 0xe94f6d3843e62d6b
; SINGLE-LABEL: .debug_types contents:
; FISSION-NOT: .debug_types contents:
; FISSION-LABEL: .debug_types.dwo contents:
; Check that we generate a hash for bar and the value.
@ -166,9 +154,9 @@
; Make sure debug_types are in comdat groups. This could be more rigid to check
; that they're the right comdat groups (each type in a separate comdat group,
; etc)
; OBJ_COMMON: Name: .debug_types (
; OBJ_COMMON-NOT: }
; OBJ_COMMON: SHF_GROUP
; OBJ_SINGLE: Name: .debug_types (
; OBJ_SINGLE-NOT: }
; OBJ_SINGLE: SHF_GROUP
; Fission type units don't go in comdat groups, since their linker is debug
; aware it's handled using the debug info semantics rather than raw ELF object