diff options
| author | Teresa Johnson <tejohnson@google.com> | 2015-12-30 19:32:24 +0000 |
|---|---|---|
| committer | Teresa Johnson <tejohnson@google.com> | 2015-12-30 19:32:24 +0000 |
| commit | cc428573a259b324d672c42fa6c466120aeef205 (patch) | |
| tree | 9760654a0eed138adada1b144654419d9357d77d /llvm/lib/IR/Metadata.cpp | |
| parent | 3e0e6e75d7fa9e199f00285a9c056f7f9e1e75f1 (diff) | |
| download | bcm5719-llvm-cc428573a259b324d672c42fa6c466120aeef205.tar.gz bcm5719-llvm-cc428573a259b324d672c42fa6c466120aeef205.zip | |
Ensure MDNode used as key in metadata linking map cannot be RAUWed
As suggested in review for r255909, add a way to ensure that temporary
MD used as keys in the MetadataToID map during ThinLTO importing are not
RAUWed.
Add support for marking an MDNode as not replaceable. Clear the new
CanReplace flag when adding a temporary MD node to the MetadataToID map
and clear it when destroying the map.
llvm-svn: 256648
Diffstat (limited to 'llvm/lib/IR/Metadata.cpp')
| -rw-r--r-- | llvm/lib/IR/Metadata.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/IR/Metadata.cpp b/llvm/lib/IR/Metadata.cpp index ab1ba5e2035..f9543a65858 100644 --- a/llvm/lib/IR/Metadata.cpp +++ b/llvm/lib/IR/Metadata.cpp @@ -190,6 +190,8 @@ void ReplaceableMetadataImpl::moveRef(void *Ref, void *New, void ReplaceableMetadataImpl::replaceAllUsesWith(Metadata *MD) { assert(!(MD && isa<MDNode>(MD) && cast<MDNode>(MD)->isTemporary()) && "Expected non-temp node"); + assert(CanReplace && + "Attempted to replace Metadata marked for no replacement"); if (UseMap.empty()) return; |
