https://bugs.llvm.org/show_bug.cgi?id=38569
Bug ID: 38569
Summary: dont emit -Wreturn-stack-address in single case
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: ndesaulni...@google.com
CC: lloz...@chromium.org, llvm-bugs@lists.llvm.org,
srhi...@google.com
>From https://github.com/ClangBuiltLinux/linux/issues/24:
The Linux kernel uses the following construct often:
#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
This produces -Wreturn-stack-address (in Clang 7+) for the label, but generates
the expected code.
I think we can detect returning the address of a label in a GNU-C-extension
statement expression, that has nothing between the label and the final
statement, and not emit the warning?
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