https://bugs.llvm.org/show_bug.cgi?id=42034
Bug ID: 42034
Summary: Incorrect expansion of '@' in inline asm macros
Product: clang
Version: 8.0
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: C
Assignee: unassignedclangb...@nondot.org
Reporter: roy...@freebsd.org
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
Hello,
clang doesn't seem to properly expand '@' when used in asm macros which are
then called in inline assembly. Given the following example:
# cc -v
FreeBSD clang version 8.0.0 (tags/RELEASE_800/final 356365) (based on LLVM
8.0.0)
Target: x86_64-unknown-freebsd13.0
Thread model: posix
InstalledDir: /usr/bin
# cat test.c
asm (".macro FOO\n.L@:\n.endm");
asm ("FOO");
asm ("FOO");
# cc -o test test.c
<instantiation>:1:1: error: invalid symbol redefinition
.L@:
^
1 error generated.
AFAICT it seems like clang doesn't carry proper count of how many times an asm
macro has been instantiated in inline assembly.
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