https://bugs.llvm.org/show_bug.cgi?id=35994
Bug ID: 35994
Summary: Duplicate vtables generated
Product: lld
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: COFF
Assignee: unassignedb...@nondot.org
Reporter: brucedaw...@chromium.org
CC: llvm-bugs@lists.llvm.org
Created attachment 19699
--> https://bugs.llvm.org/attachment.cgi?id=19699&action=edit
A report of all vftable symbols that waste more than 31 bytes
When running my ShowGlobals tool on the latest Chromium canary I noticed that
many v-tables were showing up multiple times. The attached file is a report for
chrome_child.dll.pdb. The first column is the number of excess copies of the
`vftable' symbols - a value of 1 means there is 1 extra copy, or 2 total.
The second column is the space wasted, in bytes. It is simply the size of the
v-table times the first column. The third column is the symbol name.
Possibly related to https://bugs.llvm.org/show_bug.cgi?id=31220?
This duplication was not seen when building with VC++. The total waste is not
huge but it seemed worth mentioning. It's not clear whether this is a problem
with the compiler or linker.
Objects that waste less than 32 bytes are not reported on (IIRC).
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
