https://bugs.llvm.org/show_bug.cgi?id=38999
Bug ID: 38999
Summary: x86 integrated assembler: replace .irp 'symbol' under
.altmacro mode
Product: new-bugs
Version: 5.0
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: ema...@freebsd.org
CC: llvm-bugs@lists.llvm.org
Blocks: 33405
Found while trying to build the FreeBSD base system entirely with the
integrated assembler.
One of .altmacro's effects is:
Expression results as strings
You can write `%expr' to evaluate the expression expr and use the result as
a string.
Consider the following snippet:
------------------------
.altmacro
.macro m dst,src
addq %\src,%\dst
.endm
.irp r,r15
m r,r8
.endr
------------------------
GNU as and gcc assemble this, while Clang (6.0) IAS produces:
<instantiation>:1:10: error: invalid register name
addq %r8,%r
^~
<instantiation>:1:1: note: while in macro instantiation
m r,r8
^
macro.s:7:1: note: while in macro instantiation
.irp r,r15
^
Referenced Bugs:
https://bugs.llvm.org/show_bug.cgi?id=33405
[Bug 33405] [meta] Using the integrated assembler to build the FreeBSD base
system (kernel + world)
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