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| author | Eli Friedman <efriedma@quicinc.com> | 2023-04-17 13:15:46 -0700 |
|---|---|---|
| committer | Eli Friedman <efriedma@quicinc.com> | 2023-04-17 13:17:25 -0700 |
| commit | 10c17c97ebaf81ac26f6830e51a7a57ddcf63cd2 (patch) | |
| tree | 4a7e6b501f6e0e44e1196d18cace1b80e7c01587 /llvm/lib/MC/MCWinCOFFStreamer.cpp | |
| parent | b0b2b2e047caa5a7c4b7e15d4425493f2df18d79 (diff) | |
| download | llvm-10c17c97ebaf81ac26f6830e51a7a57ddcf63cd2.zip llvm-10c17c97ebaf81ac26f6830e51a7a57ddcf63cd2.tar.gz llvm-10c17c97ebaf81ac26f6830e51a7a57ddcf63cd2.tar.bz2 | |
[COFF] Add MC support for emitting IMAGE_WEAK_EXTERN_ANTI_DEPENDENCY symbols
This is mostly useful for ARM64EC, which uses such symbols extensively.
One interesting quirk of ARM64EC is that we need to be able to emit weak
symbols that point at each other (so if either symbol is defined
elsewhere, both symbols point at the definition). This required a few
changes to the way we handle weak symbols on Windows.
Differential Revision: https://reviews.llvm.org/D145208
Diffstat (limited to 'llvm/lib/MC/MCWinCOFFStreamer.cpp')
| -rw-r--r-- | llvm/lib/MC/MCWinCOFFStreamer.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/MC/MCWinCOFFStreamer.cpp b/llvm/lib/MC/MCWinCOFFStreamer.cpp index c9a9681..ad0b1c1 100644 --- a/llvm/lib/MC/MCWinCOFFStreamer.cpp +++ b/llvm/lib/MC/MCWinCOFFStreamer.cpp @@ -115,7 +115,11 @@ bool MCWinCOFFStreamer::emitSymbolAttribute(MCSymbol *S, default: return false; case MCSA_WeakReference: case MCSA_Weak: - Symbol->setIsWeakExternal(); + Symbol->setIsWeakExternal(COFF::IMAGE_WEAK_EXTERN_SEARCH_ALIAS); + Symbol->setExternal(true); + break; + case MCSA_WeakAntiDep: + Symbol->setIsWeakExternal(COFF::IMAGE_WEAK_EXTERN_ANTI_DEPENDENCY); Symbol->setExternal(true); break; case MCSA_Global: |