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| author | Pavel Labath <labath@google.com> | 2018-04-09 14:38:53 +0000 |
|---|---|---|
| committer | Pavel Labath <labath@google.com> | 2018-04-09 14:38:53 +0000 |
| commit | eadfac87480b76f2069e41da9b92fe9f745fac8a (patch) | |
| tree | d8b10e583630f313942e9185271305ccaba73e35 /llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp | |
| parent | c1d6b5e458ed8d9f21b5548ef10c96dbdab9f476 (diff) | |
| download | llvm-eadfac87480b76f2069e41da9b92fe9f745fac8a.zip llvm-eadfac87480b76f2069e41da9b92fe9f745fac8a.tar.gz llvm-eadfac87480b76f2069e41da9b92fe9f745fac8a.tar.bz2 | |
[CodeGen/AccelTable] Don't emit zero-CU name indexes
Summary:
If an input DICompileUnit is completely empty (e.g., the result of
running "clang -g" on an empty file), we don't bother emitting an empty
DWARF CU. When we do that, we must make sure we don't also emit a DWARF v5
name index, as DWARF specifies that each index must reference at least
one compilation unit.
Reviewers: JDevlieghere, aprantl, dblaikie
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D45435
llvm-svn: 329575
Diffstat (limited to 'llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp b/llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp index d6cfbdb..1107e02 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, |