[llvm] [BOLT][DWARF] Skip processing DWO files with ID 0 (PR #154749)
Jinjie Huang via llvm-commits
llvm-commits at lists.llvm.org
Tue Sep 2 03:09:30 PDT 2025
https://github.com/Jinjie-Huang updated https://github.com/llvm/llvm-project/pull/154749
>From 52a597933e3715742eff38b4f090b4af07a43385 Mon Sep 17 00:00:00 2001
From: huangjinjie <huangjinjie at bytedance.com>
Date: Thu, 21 Aug 2025 21:29:01 +0800
Subject: [PATCH 1/6] Avoid unnecessary work if DWO id is zero
---
bolt/lib/Rewrite/DWARFRewriter.cpp | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/bolt/lib/Rewrite/DWARFRewriter.cpp b/bolt/lib/Rewrite/DWARFRewriter.cpp
index 0c1a1bac6c72e..bcde3ccfa691e 100644
--- a/bolt/lib/Rewrite/DWARFRewriter.cpp
+++ b/bolt/lib/Rewrite/DWARFRewriter.cpp
@@ -613,6 +613,7 @@ void DWARFRewriter::updateDebugInfo() {
auto createRangeLocListAddressWriters = [&](DWARFUnit &CU) {
std::lock_guard<std::mutex> Lock(AccessMutex);
const uint16_t DwarfVersion = CU.getVersion();
+ std::optional<uint64_t> DWOId = CU.getDWOId();
if (DwarfVersion >= 5) {
auto AddrW = std::make_unique<DebugAddrWriterDwarf5>(
&BC, CU.getAddressByteSize(), CU.getAddrOffsetSectionBase());
@@ -620,7 +621,7 @@ void DWARFRewriter::updateDebugInfo() {
LocListWritersByCU[CUIndex] =
std::make_unique<DebugLoclistWriter>(CU, DwarfVersion, false, *AddrW);
- if (std::optional<uint64_t> DWOId = CU.getDWOId()) {
+ if (DWOId && *DWOId != 0) {
assert(RangeListsWritersByCU.count(*DWOId) == 0 &&
"RangeLists writer for DWO unit already exists.");
auto DWORangeListsSectionWriter =
@@ -635,7 +636,7 @@ void DWARFRewriter::updateDebugInfo() {
std::make_unique<DebugAddrWriter>(&BC, CU.getAddressByteSize());
AddressWritersByCU[CU.getOffset()] = std::move(AddrW);
LocListWritersByCU[CUIndex] = std::make_unique<DebugLocWriter>();
- if (std::optional<uint64_t> DWOId = CU.getDWOId()) {
+ if (DWOId && *DWOId != 0) {
assert(LegacyRangesWritersByCU.count(*DWOId) == 0 &&
"LegacyRangeLists writer for DWO unit already exists.");
auto LegacyRangesSectionWriterByCU =
>From c794f9a8be4e402060b01d2c792c74fa161c4632 Mon Sep 17 00:00:00 2001
From: huangjinjie <huangjinjie at bytedance.com>
Date: Thu, 28 Aug 2025 21:57:48 +0800
Subject: [PATCH 2/6] Skip updating DWO CUs whose DWO ID is 0.
---
bolt/lib/Rewrite/DWARFRewriter.cpp | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/bolt/lib/Rewrite/DWARFRewriter.cpp b/bolt/lib/Rewrite/DWARFRewriter.cpp
index bcde3ccfa691e..1eb7932edbc2b 100644
--- a/bolt/lib/Rewrite/DWARFRewriter.cpp
+++ b/bolt/lib/Rewrite/DWARFRewriter.cpp
@@ -614,6 +614,8 @@ void DWARFRewriter::updateDebugInfo() {
std::lock_guard<std::mutex> Lock(AccessMutex);
const uint16_t DwarfVersion = CU.getVersion();
std::optional<uint64_t> DWOId = CU.getDWOId();
+ if (DWOId && *DWOId == 0)
+ return;
if (DwarfVersion >= 5) {
auto AddrW = std::make_unique<DebugAddrWriterDwarf5>(
&BC, CU.getAddressByteSize(), CU.getAddrOffsetSectionBase());
@@ -621,7 +623,7 @@ void DWARFRewriter::updateDebugInfo() {
LocListWritersByCU[CUIndex] =
std::make_unique<DebugLoclistWriter>(CU, DwarfVersion, false, *AddrW);
- if (DWOId && *DWOId != 0) {
+ if (DWOId) {
assert(RangeListsWritersByCU.count(*DWOId) == 0 &&
"RangeLists writer for DWO unit already exists.");
auto DWORangeListsSectionWriter =
@@ -636,7 +638,7 @@ void DWARFRewriter::updateDebugInfo() {
std::make_unique<DebugAddrWriter>(&BC, CU.getAddressByteSize());
AddressWritersByCU[CU.getOffset()] = std::move(AddrW);
LocListWritersByCU[CUIndex] = std::make_unique<DebugLocWriter>();
- if (DWOId && *DWOId != 0) {
+ if (DWOId) {
assert(LegacyRangesWritersByCU.count(*DWOId) == 0 &&
"LegacyRangeLists writer for DWO unit already exists.");
auto LegacyRangesSectionWriterByCU =
@@ -733,7 +735,7 @@ void DWARFRewriter::updateDebugInfo() {
createRangeLocListAddressWriters(*CU);
std::optional<DWARFUnit *> SplitCU;
std::optional<uint64_t> DWOId = CU->getDWOId();
- if (DWOId)
+ if (DWOId && *DWOId != 0)
SplitCU = BC.getDWOCU(*DWOId);
if (!SplitCU)
continue;
>From f1d8899df9a43f991f78e97320ebfa9f9fd2256e Mon Sep 17 00:00:00 2001
From: huangjinjie <huangjinjie at bytedance.com>
Date: Mon, 1 Sep 2025 01:22:07 +0800
Subject: [PATCH 3/6] Do not generate information for DWO ID 0
---
bolt/lib/Core/DIEBuilder.cpp | 3 +++
bolt/lib/Rewrite/DWARFRewriter.cpp | 10 +++++-----
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/bolt/lib/Core/DIEBuilder.cpp b/bolt/lib/Core/DIEBuilder.cpp
index b041dc5ea1cce..a313b298161d6 100644
--- a/bolt/lib/Core/DIEBuilder.cpp
+++ b/bolt/lib/Core/DIEBuilder.cpp
@@ -583,6 +583,9 @@ DWARFDie DIEBuilder::resolveDIEReference(
uint64_t TmpRefOffset = RefOffset;
if ((RefCU =
getUnitForOffset(*this, *DwarfContext, TmpRefOffset, AttrSpec))) {
+ std::optional<uint64_t> DWOId = RefCU->getDWOId();
+ if (DWOId && *DWOId == 0)
+ return DWARFDie();
/// Trying to add to current working set in case it's cross CU reference.
registerUnit(*RefCU, true);
DWARFDataExtractor DebugInfoData = RefCU->getDebugInfoExtractor();
diff --git a/bolt/lib/Rewrite/DWARFRewriter.cpp b/bolt/lib/Rewrite/DWARFRewriter.cpp
index 1eb7932edbc2b..32647bd6449b4 100644
--- a/bolt/lib/Rewrite/DWARFRewriter.cpp
+++ b/bolt/lib/Rewrite/DWARFRewriter.cpp
@@ -551,6 +551,9 @@ static CUPartitionVector partitionCUs(DWARFContext &DwCtx) {
unsigned Counter = 0;
const DWARFDebugAbbrev *Abbr = DwCtx.getDebugAbbrev();
for (std::unique_ptr<DWARFUnit> &CU : DwCtx.compile_units()) {
+ std::optional<uint64_t> DWOId = CU->getDWOId();
+ if (DWOId && *DWOId == 0)
+ continue;
Expected<const DWARFAbbreviationDeclarationSet *> AbbrDeclSet =
Abbr->getAbbreviationDeclarationSet(CU->getAbbreviationsOffset());
if (!AbbrDeclSet) {
@@ -613,9 +616,6 @@ void DWARFRewriter::updateDebugInfo() {
auto createRangeLocListAddressWriters = [&](DWARFUnit &CU) {
std::lock_guard<std::mutex> Lock(AccessMutex);
const uint16_t DwarfVersion = CU.getVersion();
- std::optional<uint64_t> DWOId = CU.getDWOId();
- if (DWOId && *DWOId == 0)
- return;
if (DwarfVersion >= 5) {
auto AddrW = std::make_unique<DebugAddrWriterDwarf5>(
&BC, CU.getAddressByteSize(), CU.getAddrOffsetSectionBase());
@@ -623,7 +623,7 @@ void DWARFRewriter::updateDebugInfo() {
LocListWritersByCU[CUIndex] =
std::make_unique<DebugLoclistWriter>(CU, DwarfVersion, false, *AddrW);
- if (DWOId) {
+ if (std::optional<uint64_t> DWOId = CU.getDWOId()) {
assert(RangeListsWritersByCU.count(*DWOId) == 0 &&
"RangeLists writer for DWO unit already exists.");
auto DWORangeListsSectionWriter =
@@ -638,7 +638,7 @@ void DWARFRewriter::updateDebugInfo() {
std::make_unique<DebugAddrWriter>(&BC, CU.getAddressByteSize());
AddressWritersByCU[CU.getOffset()] = std::move(AddrW);
LocListWritersByCU[CUIndex] = std::make_unique<DebugLocWriter>();
- if (DWOId) {
+ if (std::optional<uint64_t> DWOId = CU.getDWOId()) {
assert(LegacyRangesWritersByCU.count(*DWOId) == 0 &&
"LegacyRangeLists writer for DWO unit already exists.");
auto LegacyRangesSectionWriterByCU =
>From cb9e307778559fb6b1dea777daa341c8e60cefdf Mon Sep 17 00:00:00 2001
From: huangjinjie <huangjinjie at bytedance.com>
Date: Tue, 2 Sep 2025 15:42:48 +0800
Subject: [PATCH 4/6] Do not generate information for DWO ID 0
---
bolt/lib/Core/BinaryContext.cpp | 2 ++
1 file changed, 2 insertions(+)
diff --git a/bolt/lib/Core/BinaryContext.cpp b/bolt/lib/Core/BinaryContext.cpp
index dd0d041692484..7a46fdd45f0c8 100644
--- a/bolt/lib/Core/BinaryContext.cpp
+++ b/bolt/lib/Core/BinaryContext.cpp
@@ -1628,6 +1628,8 @@ void BinaryContext::preprocessDWODebugInfo() {
for (const std::unique_ptr<DWARFUnit> &CU : DwCtx->compile_units()) {
DWARFUnit *const DwarfUnit = CU.get();
if (std::optional<uint64_t> DWOId = DwarfUnit->getDWOId()) {
+ if (*DWOId == 0)
+ continue;
std::string DWOName = dwarf::toString(
DwarfUnit->getUnitDIE().find(
{dwarf::DW_AT_dwo_name, dwarf::DW_AT_GNU_dwo_name}),
>From 8851f2ed3703508688929712ce4d16cf8a425246 Mon Sep 17 00:00:00 2001
From: huangjinjie <huangjinjie at bytedance.com>
Date: Tue, 2 Sep 2025 17:17:33 +0800
Subject: [PATCH 5/6] Do not generate information for DWO ID 0
---
bolt/lib/Core/BinaryContext.cpp | 7 +-
.../X86/Inputs/thinlto-split-dwarf-inlining.s | 965 ++++++++++++++++++
bolt/test/X86/dwarf5-dwoid-zero.test | 7 +
3 files changed, 977 insertions(+), 2 deletions(-)
create mode 100644 bolt/test/X86/Inputs/thinlto-split-dwarf-inlining.s
create mode 100644 bolt/test/X86/dwarf5-dwoid-zero.test
diff --git a/bolt/lib/Core/BinaryContext.cpp b/bolt/lib/Core/BinaryContext.cpp
index 7a46fdd45f0c8..6e9397e30cbd1 100644
--- a/bolt/lib/Core/BinaryContext.cpp
+++ b/bolt/lib/Core/BinaryContext.cpp
@@ -1628,12 +1628,15 @@ void BinaryContext::preprocessDWODebugInfo() {
for (const std::unique_ptr<DWARFUnit> &CU : DwCtx->compile_units()) {
DWARFUnit *const DwarfUnit = CU.get();
if (std::optional<uint64_t> DWOId = DwarfUnit->getDWOId()) {
- if (*DWOId == 0)
- continue;
std::string DWOName = dwarf::toString(
DwarfUnit->getUnitDIE().find(
{dwarf::DW_AT_dwo_name, dwarf::DW_AT_GNU_dwo_name}),
"");
+ if (*DWOId == 0) {
+ this->outs() << "BOLT-WARNING: Found DWO file of ID 0: '" << DWOName
+ << "', it will not be processed.\n";
+ continue;
+ }
SmallString<16> AbsolutePath;
if (!opts::CompDirOverride.empty()) {
sys::path::append(AbsolutePath, opts::CompDirOverride);
diff --git a/bolt/test/X86/Inputs/thinlto-split-dwarf-inlining.s b/bolt/test/X86/Inputs/thinlto-split-dwarf-inlining.s
new file mode 100644
index 0000000000000..64321f45da700
--- /dev/null
+++ b/bolt/test/X86/Inputs/thinlto-split-dwarf-inlining.s
@@ -0,0 +1,965 @@
+## This file was built through distrubuted Thinlto in order to inline callee.cpp and callee2.cpp into main.cpp
+## clang++ -O3 -g -gdwarf-5 -gsplit-dwarf -fsplit-dwarf-inlining -flto=thin -c main.cpp -o main.thinlto
+## clang++ -O3 -g -gdwarf-5 -gsplit-dwarf -fsplit-dwarf-inlining -flto=thin -c callee.cpp -o callee.thinlto
+## clang++ -O3 -g -gdwarf-5 -gsplit-dwarf -fsplit-dwarf-inlining -flto=thin -c callee2.cpp -o callee2.thinlto
+## clang++ -fuse-ld=lld -flto=thin -Wl,-plugin-opt,thinlto-index-only=main.thinlto.index main.thinlto callee.thinlto callee2.thinlto -o index
+## clang++ -O3 -g -gdwarf-5 -gsplit-dwarf -fsplit-dwarf-inlining -fthinlto-index=main.thinlto.thinlto.bc -c -x ir main.thinlto -S -o main.S
+
+## main.cpp
+## int hotFunction(int x);
+## int hotFunction2(int x);
+## int main(int argc, char **argv) {
+## int sum = 0;
+## for (int i = 0; i < 50000000; ++i) {
+## sum += hotFunction(i);
+## sum += hotFunction2(i);
+## }
+## if (sum)
+## return 0;
+## else
+## return 1;
+## }
+## callee.cpp
+## int hotFunction(int x) {
+## if ((x & 1) == 0) {
+## x = x * 3 + 1;
+## if (x % 5 == 0) {
+## x += 7;
+## }
+## } else {
+## x = x * x;
+## if (x % 3 == 0) {
+## x -= 4;
+## }
+## }
+## return x;
+## }
+## callee2.cpp
+## int hotFunction2(int x) {
+## if ((x & 2) == 0) {
+## x = x * 3 + 1;
+## if (x % 5 == 0) {
+## x += 7;
+## }
+## } else {
+## x = x * x;
+## if (x % 3 == 0) {
+## x -= 4;
+## }
+## }
+## return x;
+## }
+
+ .text
+ .file "main.cpp"
+ .section .rodata.cst16,"aM", at progbits,16
+ .p2align 4, 0x0 # -- Begin function main
+.LCPI0_0:
+ .long 0 # 0x0
+ .long 1 # 0x1
+ .long 2 # 0x2
+ .long 3 # 0x3
+.LCPI0_1:
+ .long 4 # 0x4
+ .long 4 # 0x4
+ .long 4 # 0x4
+ .long 4 # 0x4
+.LCPI0_2:
+ .long 1 # 0x1
+ .long 1 # 0x1
+ .long 1 # 0x1
+ .long 1 # 0x1
+.LCPI0_3:
+ .long 2863311531 # 0xaaaaaaab
+ .long 2863311531 # 0xaaaaaaab
+ .long 2863311531 # 0xaaaaaaab
+ .long 2863311531 # 0xaaaaaaab
+.LCPI0_4:
+ .long 2147483648 # 0x80000000
+ .long 2147483648 # 0x80000000
+ .long 2147483648 # 0x80000000
+ .long 2147483648 # 0x80000000
+.LCPI0_5:
+ .long 3579139413 # 0xd5555555
+ .long 3579139413 # 0xd5555555
+ .long 3579139413 # 0xd5555555
+ .long 3579139413 # 0xd5555555
+.LCPI0_6:
+ .long 4294967292 # 0xfffffffc
+ .long 4294967292 # 0xfffffffc
+ .long 4294967292 # 0xfffffffc
+ .long 4294967292 # 0xfffffffc
+.LCPI0_7:
+ .long 3435973837 # 0xcccccccd
+ .long 3435973837 # 0xcccccccd
+ .long 3435973837 # 0xcccccccd
+ .long 3435973837 # 0xcccccccd
+.LCPI0_8:
+ .long 3006477107 # 0xb3333333
+ .long 3006477107 # 0xb3333333
+ .long 3006477107 # 0xb3333333
+ .long 3006477107 # 0xb3333333
+.LCPI0_9:
+ .long 8 # 0x8
+ .long 8 # 0x8
+ .long 8 # 0x8
+ .long 8 # 0x8
+.LCPI0_10:
+ .long 2 # 0x2
+ .long 2 # 0x2
+ .long 2 # 0x2
+ .long 2 # 0x2
+ .text
+ .globl main
+ .p2align 4, 0x90
+ .type main, at function
+main: # @main
+.Lfunc_begin0:
+ .file 1 "./" "main.cpp" md5 0x3f802f4e24573ca71e028348cd028728
+ .loc 1 5 0 # main.cpp:5:0
+ .cfi_startproc
+# %bb.0: # %vector.ph
+ #DEBUG_VALUE: main:argc <- $edi
+ #DEBUG_VALUE: main:argv <- $rsi
+ movdqa .LCPI0_0(%rip), %xmm3 # xmm3 = [0,1,2,3]
+ movl $50000000, %eax # imm = 0x2FAF080
+.Ltmp0:
+ #DEBUG_VALUE: main:sum <- 0
+ #DEBUG_VALUE: i <- 0
+ movdqa .LCPI0_4(%rip), %xmm5 # xmm5 = [2147483648,2147483648,2147483648,2147483648]
+ movdqa .LCPI0_7(%rip), %xmm9 # xmm9 = [3435973837,3435973837,3435973837,3435973837]
+ pxor %xmm14, %xmm14
+ pxor %xmm12, %xmm12
+ movdqa .LCPI0_8(%rip), %xmm11 # xmm11 = [3006477107,3006477107,3006477107,3006477107]
+.Ltmp1:
+ .p2align 4, 0x90
+.LBB0_1: # %vector.body
+ # =>This Inner Loop Header: Depth=1
+ #DEBUG_VALUE: main:argc <- $edi
+ #DEBUG_VALUE: main:argv <- $rsi
+ #DEBUG_VALUE: main:sum <- 0
+ #DEBUG_VALUE: i <- 0
+ movdqa %xmm3, %xmm1
+ paddd .LCPI0_1(%rip), %xmm1
+.Ltmp2:
+ .file 2 "./" "callee.cpp" md5 0xaf5c6b5b41909e1a2265d9ef8d74e9d0
+ .loc 2 9 15 prologue_end # callee.cpp:9:15
+ movdqa %xmm3, %xmm2
+ pmuludq %xmm3, %xmm2
+ pshufd $232, %xmm2, %xmm15 # xmm15 = xmm2[0,2,2,3]
+ pshufd $245, %xmm3, %xmm13 # xmm13 = xmm3[1,1,3,3]
+ pmuludq %xmm13, %xmm13
+ pshufd $232, %xmm13, %xmm0 # xmm0 = xmm13[0,2,2,3]
+ punpckldq %xmm0, %xmm15 # xmm15 = xmm15[0],xmm0[0],xmm15[1],xmm0[1]
+ pshufd $245, %xmm1, %xmm0 # xmm0 = xmm1[1,1,3,3]
+.Ltmp3:
+ .loc 2 4 15 # callee.cpp:4:15
+ movdqa %xmm1, %xmm10
+ paddd %xmm1, %xmm10
+ paddd %xmm1, %xmm10
+.Ltmp4:
+ .loc 2 9 15 # callee.cpp:9:15
+ pmuludq %xmm1, %xmm1
+ pshufd $232, %xmm1, %xmm7 # xmm7 = xmm1[0,2,2,3]
+ pmuludq %xmm0, %xmm0
+ pshufd $232, %xmm0, %xmm8 # xmm8 = xmm0[0,2,2,3]
+ punpckldq %xmm8, %xmm7 # xmm7 = xmm7[0],xmm8[0],xmm7[1],xmm8[1]
+ movdqa .LCPI0_3(%rip), %xmm4 # xmm4 = [2863311531,2863311531,2863311531,2863311531]
+.Ltmp5:
+ .loc 2 10 19 # callee.cpp:10:19
+ pmuludq %xmm4, %xmm2
+ pshufd $232, %xmm2, %xmm2 # xmm2 = xmm2[0,2,2,3]
+ pmuludq %xmm4, %xmm13
+ pshufd $232, %xmm13, %xmm8 # xmm8 = xmm13[0,2,2,3]
+ punpckldq %xmm8, %xmm2 # xmm2 = xmm2[0],xmm8[0],xmm2[1],xmm8[1]
+ pxor %xmm5, %xmm2
+ movdqa .LCPI0_5(%rip), %xmm6 # xmm6 = [3579139413,3579139413,3579139413,3579139413]
+ pcmpgtd %xmm6, %xmm2
+ pmuludq %xmm4, %xmm1
+ pshufd $232, %xmm1, %xmm1 # xmm1 = xmm1[0,2,2,3]
+ pmuludq %xmm4, %xmm0
+ pshufd $232, %xmm0, %xmm0 # xmm0 = xmm0[0,2,2,3]
+ punpckldq %xmm0, %xmm1 # xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1]
+ pxor %xmm5, %xmm1
+ pcmpgtd %xmm6, %xmm1
+.Ltmp6:
+ .loc 2 10 13 is_stmt 0 # callee.cpp:10:13
+ movdqa %xmm2, %xmm0
+ pand %xmm15, %xmm0
+ movdqa .LCPI0_6(%rip), %xmm6 # xmm6 = [4294967292,4294967292,4294967292,4294967292]
+ paddd %xmm6, %xmm15
+ pandn %xmm15, %xmm2
+ por %xmm0, %xmm2
+ movdqa %xmm1, %xmm0
+ pand %xmm7, %xmm0
+ paddd %xmm6, %xmm7
+ pandn %xmm7, %xmm1
+ por %xmm0, %xmm1
+.Ltmp7:
+ .loc 2 4 15 is_stmt 1 # callee.cpp:4:15
+ movdqa %xmm3, %xmm7
+ paddd %xmm3, %xmm7
+ paddd %xmm3, %xmm7
+ .loc 2 4 19 is_stmt 0 # callee.cpp:4:19
+ movdqa %xmm7, %xmm8
+ pcmpeqd %xmm0, %xmm0
+ psubd %xmm0, %xmm8
+ movdqa %xmm10, %xmm6
+ psubd %xmm0, %xmm6
+.Ltmp8:
+ .loc 2 5 19 is_stmt 1 # callee.cpp:5:19
+ movdqa %xmm8, %xmm0
+ pmuludq %xmm9, %xmm0
+ pshufd $232, %xmm0, %xmm13 # xmm13 = xmm0[0,2,2,3]
+ pshufd $245, %xmm8, %xmm0 # xmm0 = xmm8[1,1,3,3]
+ pmuludq %xmm9, %xmm0
+ pshufd $232, %xmm0, %xmm0 # xmm0 = xmm0[0,2,2,3]
+ punpckldq %xmm0, %xmm13 # xmm13 = xmm13[0],xmm0[0],xmm13[1],xmm0[1]
+ movdqa %xmm6, %xmm0
+ pmuludq %xmm9, %xmm0
+ pshufd $232, %xmm0, %xmm0 # xmm0 = xmm0[0,2,2,3]
+ pshufd $245, %xmm6, %xmm15 # xmm15 = xmm6[1,1,3,3]
+ pmuludq %xmm9, %xmm15
+ pshufd $232, %xmm15, %xmm15 # xmm15 = xmm15[0,2,2,3]
+ punpckldq %xmm15, %xmm0 # xmm0 = xmm0[0],xmm15[0],xmm0[1],xmm15[1]
+ pxor %xmm5, %xmm13
+ pcmpgtd %xmm11, %xmm13
+ movdqa .LCPI0_9(%rip), %xmm4 # xmm4 = [8,8,8,8]
+ paddd %xmm4, %xmm7
+.Ltmp9:
+ .loc 2 5 13 is_stmt 0 # callee.cpp:5:13
+ pand %xmm13, %xmm8
+ pandn %xmm7, %xmm13
+ por %xmm8, %xmm13
+.Ltmp10:
+ .loc 2 3 12 is_stmt 1 # callee.cpp:3:12
+ movdqa %xmm3, %xmm15
+ pand .LCPI0_2(%rip), %xmm15
+ pxor %xmm8, %xmm8
+ .loc 2 3 17 is_stmt 0 # callee.cpp:3:17
+ pcmpeqd %xmm8, %xmm15
+.Ltmp11:
+ .loc 2 5 19 is_stmt 1 # callee.cpp:5:19
+ pxor %xmm5, %xmm0
+ pcmpgtd %xmm11, %xmm0
+ paddd %xmm4, %xmm10
+.Ltmp12:
+ .loc 2 5 13 is_stmt 0 # callee.cpp:5:13
+ pand %xmm0, %xmm6
+ pandn %xmm10, %xmm0
+ por %xmm6, %xmm0
+.Ltmp13:
+ .loc 2 0 0 # callee.cpp:0:0
+ movdqa %xmm15, %xmm6
+ pandn %xmm2, %xmm6
+ movdqa %xmm13, %xmm7
+ pand %xmm15, %xmm7
+ por %xmm6, %xmm7
+.Ltmp14:
+ .loc 1 8 13 is_stmt 1 # main.cpp:8:13
+ paddd %xmm14, %xmm7
+.Ltmp15:
+ .loc 2 0 0 is_stmt 0 # callee.cpp:0:0
+ movdqa %xmm0, %xmm6
+ pand %xmm15, %xmm6
+ pandn %xmm1, %xmm15
+ por %xmm6, %xmm15
+.Ltmp16:
+ .loc 1 8 13 # main.cpp:8:13
+ paddd %xmm12, %xmm15
+.Ltmp17:
+ .file 3 "./" "callee2.cpp" md5 0xdc3a45c8e5ee5cd983e9eb6e4bfdd449
+ .loc 3 3 12 is_stmt 1 # callee2.cpp:3:12
+ movdqa %xmm3, %xmm12
+ pand .LCPI0_10(%rip), %xmm12
+ .loc 3 3 17 is_stmt 0 # callee2.cpp:3:17
+ pcmpeqd %xmm8, %xmm12
+ .loc 3 0 0 # callee2.cpp:0:0
+ movdqa %xmm12, %xmm6
+ pandn %xmm2, %xmm6
+ pand %xmm12, %xmm13
+ por %xmm6, %xmm13
+.Ltmp18:
+ .loc 1 9 13 is_stmt 1 # main.cpp:9:13
+ movdqa %xmm13, %xmm14
+ paddd %xmm7, %xmm14
+.Ltmp19:
+ .loc 3 0 0 is_stmt 0 # callee2.cpp:0:0
+ pand %xmm12, %xmm0
+ pandn %xmm1, %xmm12
+ por %xmm0, %xmm12
+.Ltmp20:
+ .loc 1 9 13 # main.cpp:9:13
+ paddd %xmm15, %xmm12
+ paddd %xmm4, %xmm3
+.Ltmp21:
+ .loc 1 7 35 is_stmt 1 # main.cpp:7:35
+ addl $-8, %eax
+ jne .LBB0_1
+.Ltmp22:
+# %bb.2: # %middle.block
+ #DEBUG_VALUE: main:argc <- $edi
+ #DEBUG_VALUE: main:argv <- $rsi
+ #DEBUG_VALUE: main:sum <- 0
+ #DEBUG_VALUE: i <- 0
+ .loc 1 7 5 is_stmt 0 # main.cpp:7:5
+ paddd %xmm14, %xmm12
+ pshufd $238, %xmm12, %xmm0 # xmm0 = xmm12[2,3,2,3]
+ paddd %xmm12, %xmm0
+ pshufd $85, %xmm0, %xmm1 # xmm1 = xmm0[1,1,1,1]
+ paddd %xmm0, %xmm1
+ movd %xmm1, %ecx
+.Ltmp23:
+ .loc 1 11 9 is_stmt 1 # main.cpp:11:9
+ xorl %eax, %eax
+ testl %ecx, %ecx
+ sete %al
+.Ltmp24:
+ .loc 1 15 1 # main.cpp:15:1
+ retq
+.Ltmp25:
+.Lfunc_end0:
+ .size main, .Lfunc_end0-main
+ .cfi_endproc
+ # -- End function
+ .section .debug_abbrev,"", at progbits
+ .byte 1 # Abbreviation Code
+ .byte 74 # DW_TAG_skeleton_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 16 # DW_AT_stmt_list
+ .byte 23 # DW_FORM_sec_offset
+ .byte 114 # DW_AT_str_offsets_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 27 # DW_AT_comp_dir
+ .byte 37 # DW_FORM_strx1
+ .ascii "\264B" # DW_AT_GNU_pubnames
+ .byte 25 # DW_FORM_flag_present
+ .byte 118 # DW_AT_dwo_name
+ .byte 37 # DW_FORM_strx1
+ .byte 17 # DW_AT_low_pc
+ .byte 27 # DW_FORM_addrx
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 115 # DW_AT_addr_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 116 # DW_AT_rnglists_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 2 # Abbreviation Code
+ .byte 46 # DW_TAG_subprogram
+ .byte 1 # DW_CHILDREN_yes
+ .byte 17 # DW_AT_low_pc
+ .byte 27 # DW_FORM_addrx
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 3 # Abbreviation Code
+ .byte 29 # DW_TAG_inlined_subroutine
+ .byte 0 # DW_CHILDREN_no
+ .byte 49 # DW_AT_abstract_origin
+ .byte 16 # DW_FORM_ref_addr
+ .byte 85 # DW_AT_ranges
+ .byte 35 # DW_FORM_rnglistx
+ .byte 88 # DW_AT_call_file
+ .byte 11 # DW_FORM_data1
+ .byte 89 # DW_AT_call_line
+ .byte 11 # DW_FORM_data1
+ .byte 87 # DW_AT_call_column
+ .byte 11 # DW_FORM_data1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 4 # Abbreviation Code
+ .byte 74 # DW_TAG_skeleton_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 16 # DW_AT_stmt_list
+ .byte 23 # DW_FORM_sec_offset
+ .byte 114 # DW_AT_str_offsets_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 27 # DW_AT_comp_dir
+ .byte 37 # DW_FORM_strx1
+ .ascii "\264B" # DW_AT_GNU_pubnames
+ .byte 25 # DW_FORM_flag_present
+ .byte 37 # DW_AT_producer
+ .byte 37 # DW_FORM_strx1
+ .byte 19 # DW_AT_language
+ .byte 5 # DW_FORM_data2
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 115 # DW_AT_addr_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 5 # Abbreviation Code
+ .byte 46 # DW_TAG_subprogram
+ .byte 0 # DW_CHILDREN_no
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 32 # DW_AT_inline
+ .byte 33 # DW_FORM_implicit_const
+ .byte 1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+ .section .debug_info,"", at progbits
+.Lcu_begin0:
+ .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
+.Ldebug_info_start0:
+ .short 5 # DWARF version number
+ .byte 4 # DWARF Unit Type
+ .byte 8 # Address Size (in bytes)
+ .long .debug_abbrev # Offset Into Abbrev. Section
+ .quad 8954242594720362350
+ .byte 1 # Abbrev [1] 0x14:0x33 DW_TAG_skeleton_unit
+ .long .Lline_table_start0 # DW_AT_stmt_list
+ .long .Lstr_offsets_base0 # DW_AT_str_offsets_base
+ .byte 0 # DW_AT_comp_dir
+ # DW_AT_GNU_pubnames
+ .byte 4 # DW_AT_dwo_name
+ .byte 0 # DW_AT_low_pc
+ .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
+ .long .Laddr_table_base0 # DW_AT_addr_base
+ .long .Lrnglists_table_base0 # DW_AT_rnglists_base
+ .byte 2 # Abbrev [2] 0x2c:0x1a DW_TAG_subprogram
+ .byte 0 # DW_AT_low_pc
+ .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
+ .byte 3 # DW_AT_name
+ .byte 3 # Abbrev [3] 0x33:0x9 DW_TAG_inlined_subroutine
+ .long .debug_info+109 # DW_AT_abstract_origin
+ .byte 0 # DW_AT_ranges
+ .byte 1 # DW_AT_call_file
+ .byte 8 # DW_AT_call_line
+ .byte 16 # DW_AT_call_column
+ .byte 3 # Abbrev [3] 0x3c:0x9 DW_TAG_inlined_subroutine
+ .long .debug_info+150 # DW_AT_abstract_origin
+ .byte 1 # DW_AT_ranges
+ .byte 1 # DW_AT_call_file
+ .byte 9 # DW_AT_call_line
+ .byte 16 # DW_AT_call_column
+ .byte 0 # End Of Children Mark
+ .byte 0 # End Of Children Mark
+.Ldebug_info_end0:
+.Lcu_begin1:
+ .long .Ldebug_info_end1-.Ldebug_info_start1 # Length of Unit
+.Ldebug_info_start1:
+ .short 5 # DWARF version number
+ .byte 4 # DWARF Unit Type
+ .byte 8 # Address Size (in bytes)
+ .long .debug_abbrev # Offset Into Abbrev. Section
+ .quad 0
+ .byte 4 # Abbrev [4] 0x14:0x15 DW_TAG_skeleton_unit
+ .long .Lline_table_start0 # DW_AT_stmt_list
+ .long .Lstr_offsets_base0 # DW_AT_str_offsets_base
+ .byte 0 # DW_AT_comp_dir
+ # DW_AT_GNU_pubnames
+ .byte 5 # DW_AT_producer
+ .short 33 # DW_AT_language
+ .byte 6 # DW_AT_name
+ .long .Laddr_table_base0 # DW_AT_addr_base
+ .byte 5 # Abbrev [5] 0x26:0x2 DW_TAG_subprogram
+ .byte 1 # DW_AT_name
+ # DW_AT_inline
+ .byte 0 # End Of Children Mark
+.Ldebug_info_end1:
+.Lcu_begin2:
+ .long .Ldebug_info_end2-.Ldebug_info_start2 # Length of Unit
+.Ldebug_info_start2:
+ .short 5 # DWARF version number
+ .byte 4 # DWARF Unit Type
+ .byte 8 # Address Size (in bytes)
+ .long .debug_abbrev # Offset Into Abbrev. Section
+ .quad 0
+ .byte 4 # Abbrev [4] 0x14:0x15 DW_TAG_skeleton_unit
+ .long .Lline_table_start0 # DW_AT_stmt_list
+ .long .Lstr_offsets_base0 # DW_AT_str_offsets_base
+ .byte 0 # DW_AT_comp_dir
+ # DW_AT_GNU_pubnames
+ .byte 5 # DW_AT_producer
+ .short 33 # DW_AT_language
+ .byte 7 # DW_AT_name
+ .long .Laddr_table_base0 # DW_AT_addr_base
+ .byte 5 # Abbrev [5] 0x26:0x2 DW_TAG_subprogram
+ .byte 2 # DW_AT_name
+ # DW_AT_inline
+ .byte 0 # End Of Children Mark
+.Ldebug_info_end2:
+ .section .debug_rnglists,"", at progbits
+ .long .Ldebug_list_header_end0-.Ldebug_list_header_start0 # Length
+.Ldebug_list_header_start0:
+ .short 5 # Version
+ .byte 8 # Address size
+ .byte 0 # Segment selector size
+ .long 2 # Offset entry count
+.Lrnglists_table_base0:
+ .long .Ldebug_ranges2-.Lrnglists_table_base0
+ .long .Ldebug_ranges3-.Lrnglists_table_base0
+.Ldebug_ranges2:
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Ltmp2-.Lfunc_begin0 # starting offset
+ .uleb128 .Ltmp14-.Lfunc_begin0 # ending offset
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Ltmp15-.Lfunc_begin0 # starting offset
+ .uleb128 .Ltmp16-.Lfunc_begin0 # ending offset
+ .byte 0 # DW_RLE_end_of_list
+.Ldebug_ranges3:
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Ltmp17-.Lfunc_begin0 # starting offset
+ .uleb128 .Ltmp18-.Lfunc_begin0 # ending offset
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Ltmp19-.Lfunc_begin0 # starting offset
+ .uleb128 .Ltmp20-.Lfunc_begin0 # ending offset
+ .byte 0 # DW_RLE_end_of_list
+.Ldebug_list_header_end0:
+ .section .debug_str_offsets,"", at progbits
+ .long 36 # Length of String Offsets Set
+ .short 5
+ .short 0
+.Lstr_offsets_base0:
+ .section .debug_str,"MS", at progbits,1
+.Lskel_string0:
+ .asciz "./" # string offset=0
+.Lskel_string1:
+ .asciz "hotFunction" # string offset=45
+.Lskel_string2:
+ .asciz "hotFunction2" # string offset=57
+.Lskel_string3:
+ .asciz "main" # string offset=70
+.Lskel_string4:
+ .asciz "main.exe-thinlto-split-dwarf-inlining.dwo" # string offset=75
+.Lskel_string5:
+ .asciz "clang version 16.0.6 (gitlab at git.byted.org:sys/llvm-project.git ae0ef36eb8428ef48cb345a0e0c9ad6b3f289590)" # string offset=84
+.Lskel_string6:
+ .asciz "callee.cpp" # string offset=190
+.Lskel_string7:
+ .asciz "callee2.cpp" # string offset=201
+ .section .debug_str_offsets,"", at progbits
+ .long .Lskel_string0
+ .long .Lskel_string1
+ .long .Lskel_string2
+ .long .Lskel_string3
+ .long .Lskel_string4
+ .long .Lskel_string5
+ .long .Lskel_string6
+ .long .Lskel_string7
+ .section .debug_str_offsets.dwo,"e", at progbits
+ .long 64 # Length of String Offsets Set
+ .short 5
+ .short 0
+ .section .debug_str.dwo,"eMS", at progbits,1
+.Linfo_string0:
+ .asciz "_Z11hotFunctioni" # string offset=0
+.Linfo_string1:
+ .asciz "hotFunction" # string offset=17
+.Linfo_string2:
+ .asciz "int" # string offset=29
+.Linfo_string3:
+ .asciz "x" # string offset=33
+.Linfo_string4:
+ .asciz "_Z12hotFunction2i" # string offset=35
+.Linfo_string5:
+ .asciz "hotFunction2" # string offset=53
+.Linfo_string6:
+ .asciz "main" # string offset=66
+.Linfo_string7:
+ .asciz "argc" # string offset=71
+.Linfo_string8:
+ .asciz "argv" # string offset=76
+.Linfo_string9:
+ .asciz "char" # string offset=81
+.Linfo_string10:
+ .asciz "sum" # string offset=86
+.Linfo_string11:
+ .asciz "i" # string offset=90
+.Linfo_string12:
+ .asciz "clang version 16.0.6 (gitlab at git.byted.org:sys/llvm-project.git ae0ef36eb8428ef48cb345a0e0c9ad6b3f289590)" # string offset=92
+.Linfo_string13:
+ .asciz "main.cpp" # string offset=198
+.Linfo_string14:
+ .asciz "main.exe-thinlto-split-dwarf-inlining.dwo" # string offset=207
+ .section .debug_str_offsets.dwo,"e", at progbits
+ .long 0
+ .long 17
+ .long 29
+ .long 33
+ .long 35
+ .long 53
+ .long 66
+ .long 71
+ .long 76
+ .long 81
+ .long 86
+ .long 90
+ .long 92
+ .long 198
+ .long 207
+ .section .debug_info.dwo,"e", at progbits
+ .long .Ldebug_info_dwo_end0-.Ldebug_info_dwo_start0 # Length of Unit
+.Ldebug_info_dwo_start0:
+ .short 5 # DWARF version number
+ .byte 5 # DWARF Unit Type
+ .byte 8 # Address Size (in bytes)
+ .long 0 # Offset Into Abbrev. Section
+ .quad 8954242594720362350
+ .byte 1 # Abbrev [1] 0x14:0x8c DW_TAG_compile_unit
+ .byte 12 # DW_AT_producer
+ .short 33 # DW_AT_language
+ .byte 13 # DW_AT_name
+ .byte 14 # DW_AT_dwo_name
+ .byte 2 # Abbrev [2] 0x1a:0x12 DW_TAG_subprogram
+ .byte 0 # DW_AT_linkage_name
+ .byte 1 # DW_AT_name
+ .byte 2 # DW_AT_decl_file
+ .byte 2 # DW_AT_decl_line
+ .long 44 # DW_AT_type
+ # DW_AT_external
+ # DW_AT_inline
+ .byte 3 # Abbrev [3] 0x23:0x8 DW_TAG_formal_parameter
+ .byte 3 # DW_AT_name
+ .byte 2 # DW_AT_decl_file
+ .byte 2 # DW_AT_decl_line
+ .long 44 # DW_AT_type
+ .byte 0 # End Of Children Mark
+ .byte 4 # Abbrev [4] 0x2c:0x4 DW_TAG_base_type
+ .byte 2 # DW_AT_name
+ .byte 5 # DW_AT_encoding
+ .byte 4 # DW_AT_byte_size
+ .byte 2 # Abbrev [2] 0x30:0x12 DW_TAG_subprogram
+ .byte 4 # DW_AT_linkage_name
+ .byte 5 # DW_AT_name
+ .byte 3 # DW_AT_decl_file
+ .byte 2 # DW_AT_decl_line
+ .long 44 # DW_AT_type
+ # DW_AT_external
+ # DW_AT_inline
+ .byte 3 # Abbrev [3] 0x39:0x8 DW_TAG_formal_parameter
+ .byte 3 # DW_AT_name
+ .byte 3 # DW_AT_decl_file
+ .byte 2 # DW_AT_decl_line
+ .long 44 # DW_AT_type
+ .byte 0 # End Of Children Mark
+ .byte 5 # Abbrev [5] 0x42:0x4f DW_TAG_subprogram
+ .byte 0 # DW_AT_low_pc
+ .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
+ .byte 1 # DW_AT_frame_base
+ .byte 87
+ # DW_AT_call_all_calls
+ .byte 6 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 5 # DW_AT_decl_line
+ .long 44 # DW_AT_type
+ # DW_AT_external
+ .byte 6 # Abbrev [6] 0x51:0xa DW_TAG_formal_parameter
+ .byte 1 # DW_AT_location
+ .byte 85
+ .byte 7 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 5 # DW_AT_decl_line
+ .long 44 # DW_AT_type
+ .byte 6 # Abbrev [6] 0x5b:0xa DW_TAG_formal_parameter
+ .byte 1 # DW_AT_location
+ .byte 84
+ .byte 8 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 5 # DW_AT_decl_line
+ .long 145 # DW_AT_type
+ .byte 7 # Abbrev [7] 0x65:0x9 DW_TAG_variable
+ .byte 0 # DW_AT_const_value
+ .byte 10 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 6 # DW_AT_decl_line
+ .long 44 # DW_AT_type
+ .byte 8 # Abbrev [8] 0x6e:0x22 DW_TAG_lexical_block
+ .byte 1 # DW_AT_low_pc
+ .long .Ltmp23-.Ltmp2 # DW_AT_high_pc
+ .byte 7 # Abbrev [7] 0x74:0x9 DW_TAG_variable
+ .byte 0 # DW_AT_const_value
+ .byte 11 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 7 # DW_AT_decl_line
+ .long 44 # DW_AT_type
+ .byte 9 # Abbrev [9] 0x7d:0x9 DW_TAG_inlined_subroutine
+ .long 26 # DW_AT_abstract_origin
+ .byte 0 # DW_AT_ranges
+ .byte 1 # DW_AT_call_file
+ .byte 8 # DW_AT_call_line
+ .byte 16 # DW_AT_call_column
+ .byte 9 # Abbrev [9] 0x86:0x9 DW_TAG_inlined_subroutine
+ .long 48 # DW_AT_abstract_origin
+ .byte 1 # DW_AT_ranges
+ .byte 1 # DW_AT_call_file
+ .byte 9 # DW_AT_call_line
+ .byte 16 # DW_AT_call_column
+ .byte 0 # End Of Children Mark
+ .byte 0 # End Of Children Mark
+ .byte 10 # Abbrev [10] 0x91:0x5 DW_TAG_pointer_type
+ .long 150 # DW_AT_type
+ .byte 10 # Abbrev [10] 0x96:0x5 DW_TAG_pointer_type
+ .long 155 # DW_AT_type
+ .byte 4 # Abbrev [4] 0x9b:0x4 DW_TAG_base_type
+ .byte 9 # DW_AT_name
+ .byte 6 # DW_AT_encoding
+ .byte 1 # DW_AT_byte_size
+ .byte 0 # End Of Children Mark
+.Ldebug_info_dwo_end0:
+ .section .debug_abbrev.dwo,"e", at progbits
+ .byte 1 # Abbreviation Code
+ .byte 17 # DW_TAG_compile_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 37 # DW_AT_producer
+ .byte 37 # DW_FORM_strx1
+ .byte 19 # DW_AT_language
+ .byte 5 # DW_FORM_data2
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 118 # DW_AT_dwo_name
+ .byte 37 # DW_FORM_strx1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 2 # Abbreviation Code
+ .byte 46 # DW_TAG_subprogram
+ .byte 1 # DW_CHILDREN_yes
+ .byte 110 # DW_AT_linkage_name
+ .byte 37 # DW_FORM_strx1
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 63 # DW_AT_external
+ .byte 25 # DW_FORM_flag_present
+ .byte 32 # DW_AT_inline
+ .byte 33 # DW_FORM_implicit_const
+ .byte 1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 3 # Abbreviation Code
+ .byte 5 # DW_TAG_formal_parameter
+ .byte 0 # DW_CHILDREN_no
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 4 # Abbreviation Code
+ .byte 36 # DW_TAG_base_type
+ .byte 0 # DW_CHILDREN_no
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 62 # DW_AT_encoding
+ .byte 11 # DW_FORM_data1
+ .byte 11 # DW_AT_byte_size
+ .byte 11 # DW_FORM_data1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 5 # Abbreviation Code
+ .byte 46 # DW_TAG_subprogram
+ .byte 1 # DW_CHILDREN_yes
+ .byte 17 # DW_AT_low_pc
+ .byte 27 # DW_FORM_addrx
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 64 # DW_AT_frame_base
+ .byte 24 # DW_FORM_exprloc
+ .byte 122 # DW_AT_call_all_calls
+ .byte 25 # DW_FORM_flag_present
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 63 # DW_AT_external
+ .byte 25 # DW_FORM_flag_present
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 6 # Abbreviation Code
+ .byte 5 # DW_TAG_formal_parameter
+ .byte 0 # DW_CHILDREN_no
+ .byte 2 # DW_AT_location
+ .byte 24 # DW_FORM_exprloc
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 7 # Abbreviation Code
+ .byte 52 # DW_TAG_variable
+ .byte 0 # DW_CHILDREN_no
+ .byte 28 # DW_AT_const_value
+ .byte 13 # DW_FORM_sdata
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 8 # Abbreviation Code
+ .byte 11 # DW_TAG_lexical_block
+ .byte 1 # DW_CHILDREN_yes
+ .byte 17 # DW_AT_low_pc
+ .byte 27 # DW_FORM_addrx
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 9 # Abbreviation Code
+ .byte 29 # DW_TAG_inlined_subroutine
+ .byte 0 # DW_CHILDREN_no
+ .byte 49 # DW_AT_abstract_origin
+ .byte 19 # DW_FORM_ref4
+ .byte 85 # DW_AT_ranges
+ .byte 35 # DW_FORM_rnglistx
+ .byte 88 # DW_AT_call_file
+ .byte 11 # DW_FORM_data1
+ .byte 89 # DW_AT_call_line
+ .byte 11 # DW_FORM_data1
+ .byte 87 # DW_AT_call_column
+ .byte 11 # DW_FORM_data1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 10 # Abbreviation Code
+ .byte 15 # DW_TAG_pointer_type
+ .byte 0 # DW_CHILDREN_no
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+ .section .debug_rnglists.dwo,"e", at progbits
+ .long .Ldebug_list_header_end1-.Ldebug_list_header_start1 # Length
+.Ldebug_list_header_start1:
+ .short 5 # Version
+ .byte 8 # Address size
+ .byte 0 # Segment selector size
+ .long 2 # Offset entry count
+.Lrnglists_dwo_table_base0:
+ .long .Ldebug_ranges0-.Lrnglists_dwo_table_base0
+ .long .Ldebug_ranges1-.Lrnglists_dwo_table_base0
+.Ldebug_ranges0:
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Ltmp2-.Lfunc_begin0 # starting offset
+ .uleb128 .Ltmp14-.Lfunc_begin0 # ending offset
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Ltmp15-.Lfunc_begin0 # starting offset
+ .uleb128 .Ltmp16-.Lfunc_begin0 # ending offset
+ .byte 0 # DW_RLE_end_of_list
+.Ldebug_ranges1:
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Ltmp17-.Lfunc_begin0 # starting offset
+ .uleb128 .Ltmp18-.Lfunc_begin0 # ending offset
+ .byte 4 # DW_RLE_offset_pair
+ .uleb128 .Ltmp19-.Lfunc_begin0 # starting offset
+ .uleb128 .Ltmp20-.Lfunc_begin0 # ending offset
+ .byte 0 # DW_RLE_end_of_list
+.Ldebug_list_header_end1:
+ .section .debug_addr,"", at progbits
+ .long .Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution
+.Ldebug_addr_start0:
+ .short 5 # DWARF version number
+ .byte 8 # Address size
+ .byte 0 # Segment selector size
+.Laddr_table_base0:
+ .quad .Lfunc_begin0
+ .quad .Ltmp2
+.Ldebug_addr_end0:
+ .section .debug_gnu_pubnames,"", at progbits
+ .long .LpubNames_end0-.LpubNames_start0 # Length of Public Names Info
+.LpubNames_start0:
+ .short 2 # DWARF Version
+ .long .Lcu_begin0 # Offset of Compilation Unit Info
+ .long 71 # Compilation Unit Length
+ .long 26 # DIE offset
+ .byte 48 # Attributes: FUNCTION, EXTERNAL
+ .asciz "hotFunction" # External Name
+ .long 48 # DIE offset
+ .byte 48 # Attributes: FUNCTION, EXTERNAL
+ .asciz "hotFunction2" # External Name
+ .long 66 # DIE offset
+ .byte 48 # Attributes: FUNCTION, EXTERNAL
+ .asciz "main" # External Name
+ .long 0 # End Mark
+.LpubNames_end0:
+ .section .debug_gnu_pubtypes,"", at progbits
+ .long .LpubTypes_end0-.LpubTypes_start0 # Length of Public Types Info
+.LpubTypes_start0:
+ .short 2 # DWARF Version
+ .long .Lcu_begin0 # Offset of Compilation Unit Info
+ .long 71 # Compilation Unit Length
+ .long 44 # DIE offset
+ .byte 144 # Attributes: TYPE, STATIC
+ .asciz "int" # External Name
+ .long 155 # DIE offset
+ .byte 144 # Attributes: TYPE, STATIC
+ .asciz "char" # External Name
+ .long 0 # End Mark
+.LpubTypes_end0:
+ .section .debug_gnu_pubnames,"", at progbits
+ .long .LpubNames_end1-.LpubNames_start1 # Length of Public Names Info
+.LpubNames_start1:
+ .short 2 # DWARF Version
+ .long .Lcu_begin1 # Offset of Compilation Unit Info
+ .long 41 # Compilation Unit Length
+ .long 0 # End Mark
+.LpubNames_end1:
+ .section .debug_gnu_pubtypes,"", at progbits
+ .long .LpubTypes_end1-.LpubTypes_start1 # Length of Public Types Info
+.LpubTypes_start1:
+ .short 2 # DWARF Version
+ .long .Lcu_begin1 # Offset of Compilation Unit Info
+ .long 41 # Compilation Unit Length
+ .long 0 # End Mark
+.LpubTypes_end1:
+ .section .debug_gnu_pubnames,"", at progbits
+ .long .LpubNames_end2-.LpubNames_start2 # Length of Public Names Info
+.LpubNames_start2:
+ .short 2 # DWARF Version
+ .long .Lcu_begin2 # Offset of Compilation Unit Info
+ .long 41 # Compilation Unit Length
+ .long 0 # End Mark
+.LpubNames_end2:
+ .section .debug_gnu_pubtypes,"", at progbits
+ .long .LpubTypes_end2-.LpubTypes_start2 # Length of Public Types Info
+.LpubTypes_start2:
+ .short 2 # DWARF Version
+ .long .Lcu_begin2 # Offset of Compilation Unit Info
+ .long 41 # Compilation Unit Length
+ .long 0 # End Mark
+.LpubTypes_end2:
+ .ident "clang version 16.0.6 (gitlab at git.byted.org:sys/llvm-project.git ae0ef36eb8428ef48cb345a0e0c9ad6b3f289590)"
+ .ident "clang version 16.0.6 (gitlab at git.byted.org:sys/llvm-project.git ae0ef36eb8428ef48cb345a0e0c9ad6b3f289590)"
+ .ident "clang version 16.0.6 (gitlab at git.byted.org:sys/llvm-project.git ae0ef36eb8428ef48cb345a0e0c9ad6b3f289590)"
+ .section .GCC.command.line,"MS", at progbits,1
+ .zero 1
+ .ascii "/data00/tiger/cpp_tools/x86_64_x86_64_clang_1606/bin/clang-16 --driver-mode=g++ --gcc-toolchain=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606 --sysroot=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606/sysroot -pipe --gcc-toolchain=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606 --sysroot=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606/sysroot -O3 -g -gdwarf-5 -gsplit-dwarf -fno-debug-info-for-profiling -fsplit-dwarf-inlining -flto=thin -c main.cpp -o main.thinlto -Werror=return-type -Wno-error=return-type-c-linkage"
+ .zero 1
+ .ascii "/data00/tiger/cpp_tools/x86_64_x86_64_clang_1606/bin/clang-16 --driver-mode=g++ --gcc-toolchain=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606 --sysroot=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606/sysroot -pipe --gcc-toolchain=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606 --sysroot=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606/sysroot -O3 -g -gdwarf-5 -gsplit-dwarf -fno-debug-info-for-profiling -fsplit-dwarf-inlining -flto=thin -c callee.cpp -o callee.thinlto -Werror=return-type -Wno-error=return-type-c-linkage"
+ .zero 1
+ .ascii "/data00/tiger/cpp_tools/x86_64_x86_64_clang_1606/bin/clang-16 --driver-mode=g++ --gcc-toolchain=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606 --sysroot=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606/sysroot -pipe --gcc-toolchain=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606 --sysroot=/opt/tiger/cpp_tools/x86_64_x86_64_clang_1606/sysroot -O3 -g -gdwarf-5 -gsplit-dwarf -fno-debug-info-for-profiling -fsplit-dwarf-inlining -flto=thin -c callee2.cpp -o callee2.thinlto -Werror=return-type -Wno-error=return-type-c-linkage"
+ .zero 1
+ .section .debug_gnu_pubtypes,"", at progbits
+ .section ".note.GNU-stack","", at progbits
+ .addrsig
+ .section .debug_line,"", at progbits
+.Lline_table_start0:
diff --git a/bolt/test/X86/dwarf5-dwoid-zero.test b/bolt/test/X86/dwarf5-dwoid-zero.test
new file mode 100644
index 0000000000000..da2687e32a7ae
--- /dev/null
+++ b/bolt/test/X86/dwarf5-dwoid-zero.test
@@ -0,0 +1,7 @@
+# RUN: rm -rf %t && mkdir -p %t
+# RUN: %clang -O3 -g -gdwarf-5 -gsplit-dwarf -Wl,-q %p/Inputs/thinlto-split-dwarf-inlining.s -o %t/main.exe
+# RUN: llvm-bolt %t/main.exe -o %t/main.exe.bolt -update-debug-sections -comp-dir-override="./" 2>&1 | FileCheck %s
+
+# CHECK-NOT: Assertion `RangeListsWritersByCU.count(*DWOId) == 0 && "RangeLists writer for DWO unit already exists."'
+# CHECK: BOLT-WARNING: Found DWO file of ID 0:
+
>From 1acbf668fe93676aba7933bbc41ba6cf75808f1c Mon Sep 17 00:00:00 2001
From: huangjinjie <huangjinjie at bytedance.com>
Date: Tue, 2 Sep 2025 18:08:47 +0800
Subject: [PATCH 6/6] add test
---
bolt/lib/Core/BinaryContext.cpp | 5 +++--
bolt/test/X86/dwarf5-dwoid-zero.test | 3 +--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/bolt/lib/Core/BinaryContext.cpp b/bolt/lib/Core/BinaryContext.cpp
index 6e9397e30cbd1..37785e4f8cc69 100644
--- a/bolt/lib/Core/BinaryContext.cpp
+++ b/bolt/lib/Core/BinaryContext.cpp
@@ -1727,11 +1727,12 @@ void BinaryContext::preprocessDebugInfo() {
StringRef GlobalPrefix = AsmInfo->getPrivateGlobalPrefix();
for (const std::unique_ptr<DWARFUnit> &CU : DwCtx->compile_units()) {
const uint64_t CUID = CU->getOffset();
+ std::optional<uint64_t> DWOID = CU->getDWOId();
DwarfLineTable &BinaryLineTable = getDwarfLineTable(CUID);
BinaryLineTable.setLabel(Ctx->getOrCreateSymbol(
GlobalPrefix + "line_table_start" + Twine(CUID)));
- if (!ProcessedCUs.count(CU.get()))
+ if (!ProcessedCUs.count(CU.get()) || (DWOID && *DWOID ==0))
continue;
const DWARFDebugLine::LineTable *LineTable =
@@ -1746,7 +1747,7 @@ void BinaryContext::preprocessDebugInfo() {
Checksum = LineTable->Prologue.FileNames[0].Checksum;
std::optional<const char *> Name =
dwarf::toString(CU->getUnitDIE().find(dwarf::DW_AT_name), nullptr);
- if (std::optional<uint64_t> DWOID = CU->getDWOId()) {
+ if (DWOID) {
auto Iter = DWOCUs.find(*DWOID);
if (Iter == DWOCUs.end()) {
this->errs() << "BOLT-ERROR: DWO CU was not found for " << Name
diff --git a/bolt/test/X86/dwarf5-dwoid-zero.test b/bolt/test/X86/dwarf5-dwoid-zero.test
index da2687e32a7ae..7cc19e83c24f5 100644
--- a/bolt/test/X86/dwarf5-dwoid-zero.test
+++ b/bolt/test/X86/dwarf5-dwoid-zero.test
@@ -1,7 +1,6 @@
# RUN: rm -rf %t && mkdir -p %t
# RUN: %clang -O3 -g -gdwarf-5 -gsplit-dwarf -Wl,-q %p/Inputs/thinlto-split-dwarf-inlining.s -o %t/main.exe
-# RUN: llvm-bolt %t/main.exe -o %t/main.exe.bolt -update-debug-sections -comp-dir-override="./" 2>&1 | FileCheck %s
+# RUN: llvm-bolt %t/main.exe -o %t/main.exe.bolt -update-debug-sections -comp-dir-override="%t" 2>&1 | FileCheck %s
# CHECK-NOT: Assertion `RangeListsWritersByCU.count(*DWOId) == 0 && "RangeLists writer for DWO unit already exists."'
# CHECK: BOLT-WARNING: Found DWO file of ID 0:
-
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