https://bugs.llvm.org/show_bug.cgi?id=38945
Bug ID: 38945
Summary: Assembler does not understand symbol used as operand
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: j...@jms.id.au
CC: llvm-bugs@lists.llvm.org
Created attachment 20880
--> https://bugs.llvm.org/attachment.cgi?id=20880&action=edit
example
When building the powerpc Linux kernel, clang trips up on
arch/powerpc/boot/crt0.S:
cmpdi r12,RELACOUNT@l
Enclosing the RELACOUNT with () allows it to work. binutils does not require
this, so clang will not work with a bunch of existing code. It would be nice if
clang supported the same syntax.
A simple example, built with clang trunk:
cat << EOF > t.S
NUMBER = 0x6ffffff9
.text
.globl main
main:
cmpwi 8,NUMBER@l
EOF
$ clang-8 -target powerpc64le-linux-gnu t.S
t.S:6:18: error: unexpected modifier on variable reference
cmpwi 8,NUMBER@l
^
t.S:6:10: error: unknown operand
cmpwi 8,NUMBER@l
^
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