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-rw-r--r--llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp2
-rw-r--r--llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp4
2 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp b/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp
index d6cfbdb37e5..1107e020696 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp
@@ -356,6 +356,8 @@ void AppleAccelTableEmitter::emit() const {
void Dwarf5AccelTableEmitter::Header::emit(
const Dwarf5AccelTableEmitter &Ctx) const {
+ assert(CompUnitCount > 0 && "Index must have at least one CU.");
+
AsmPrinter *Asm = Ctx.Asm;
Asm->OutStreamer->AddComment("Header: unit length");
Asm->EmitLabelDifference(Ctx.ContributionEnd, Ctx.ContributionStart,
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 5cd59b4da9e..177a094b68b 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1468,6 +1468,10 @@ void DwarfDebug::emitAccel(AccelTableT &Accel, MCSection *Section,
}
void DwarfDebug::emitAccelDebugNames() {
+ // Don't emit anything if we have no compilation units to index.
+ if (getUnits().empty())
+ return;
+
Asm->OutStreamer->SwitchSection(
Asm->getObjFileLowering().getDwarfDebugNamesSection());
emitDWARF5AccelTable(Asm, AccelDebugNames, *this, getUnits());
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