Re: Stop Gas from generating line info or address ranges

	* doc/as.texi (.nop): Document optional size arg.
	* dwarf2dbg.c (dwarf2_gen_line_info_1): Only check SEC_ALLOC
	when ELF.  Warn whenever dwarf line number information is ignored.
	* frags.c (frag_offset_ignore_align_p): New function.
	* frags.h (frag_offset_ignore_align_p): Declare.
	* read.c (s_nop): Extend to support optional size arg.
	* testsuite/gas/elf/dwarf2-20.d: Expect warnings, and exact range.
	* testsuite/gas/elf/dwarf2-20.s: Emit 16 bytes worth of nops.
	* testsuite/gas/m68hc11/indexed12.d: Expect warnings.

1 files changed, 9 insertions, 5 deletions

diff --git a/gas/doc/as.texi b/gas/doc/as.texi
index 84a7e61..983cec3 100644
--- a/gas/doc/as.texi
+++ b/gas/doc/as.texi
@@ -6169,14 +6169,18 @@ counter, and @code{.nolist} decrements it.  Assembly listings are
 generated whenever the counter is greater than zero.
 
 @node Nop
-@section @code{.nop}
+@section @code{.nop [@var{size}]}
 
 @cindex @code{nop} directive
 @cindex filling memory with no-op instructions
-This directive emits a single no-op instruction.  It is provided on all
-architectures, allowing the creation of architecture neutral tests involving
-actual code.  The size of the generated instruction is target specific.  The
-instruction does affect the generation of DWARF debug line information.
+This directive emits no-op instructions.  It is provided on all architectures,
+allowing the creation of architecture neutral tests involving actual code.  The
+size of the generated instruction is target specific, but if the optional
+@var{size} argument is given and resolves to an absolute positive value at that
+point in assembly (no forward expressions allowed) then the fewest no-op
+instructions are emitted that equal or exceed a total @var{size} in bytes.
+@code{.nop} does affect the generation of DWARF debug line information.
+Some targets do not support using @code{.nop} with @var{size}.
 
 @node Nops
 @section @code{.nops @var{size}[, @var{control}]}