http://llvm.org/bugs/show_bug.cgi?id=15159
Bug ID: 15159
Summary: Global blocks don’t have a signature (the
BLOCK_HAS_SIGNATURE flag is not set)
Product: clang
Version: trunk
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
When inspecting blocks in a project built with the latest version of Xcode (4.6
which has the following version of clang: 425.0.24 (based on LLVM 3.2svn), I
realized that global blocks do not have a signature in the descriptor member
and indeed the BLOCK_HAS_SIGNATURE flag is not set.
A quick look through CGBlocks.cpp does seem to intend that global block are
emitted with a signature given that the buildGlobalBlock function sets the
flag:
BlockFlags flags = BLOCK_IS_GLOBAL | BLOCK_HAS_SIGNATURE;
However, it doesn’t seem to happen in practice. Is there something I am
misinterpreting or is it actually intended behaviour? I feel two blocks ought
to be inspectable in the same way, disregarding their actual type.
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