While working on this patch I saw that this target has an -mlra option
that still defaults to off. Although the LRA support was added in
2018 apparently it wasn't robust enough to enable by default. We are
supposed to be deleting reload support and all targets that don't use
LRA by default in GCC 16, so this target may be declared obsolete very
soon, but I've made the documentation of other options consistent with
the .opt files and conventions used for other targets anyway in case
either somebody who can build/test for this target switches the
default (see PR target/113947) or the reload removal is postponed.
gcc/ChangeLog
PR other/122243
* doc/invoke.texi (Option Summary) <PDP-11 Options>: Remove
redundant -mno- forms from the list.
(PDP-11 Options): Fix some markup issues. Merge documentation
of positive and negative forms of -mac0. Index negative forms
of -m40, -m45, -msplit, -mlra.
---
gcc/doc/invoke.texi | 28 +++++++++++++++++-----------
1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index f403d20bc0b..413259f2fe3 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1292,8 +1292,8 @@ Objective-C and Objective-C++ Dialects}.
-mcmodel=@var{code-model}}
@emph{PDP-11 Options} (@ref{PDP-11 Options})
-@gccoptlist{-mfpu -msoft-float -mac0 -mno-ac0 -m40 -m45 -m10
--mint32 -mno-int16 -mint16 -mno-int32
+@gccoptlist{-mfpu -msoft-float -mac0 -m40 -m45 -m10
+-mint32 -mint16
-msplit -munix-asm -mdec-asm -mgnu-asm -mlra}
@emph{PowerPC Options}
@@ -31675,31 +31675,35 @@ These options are defined for the PDP-11:
@opindex mfpu
@item -mfpu
Use hardware FPP floating point. This is the default. (FIS floating
-point on the PDP-11/40 is not supported.) Implies -m45.
+point on the PDP-11/40 is not supported.) Implies @option{-m45}.
@opindex msoft-float
@item -msoft-float
Do not use hardware floating point.
@opindex mac0
-@item -mac0
-Return floating-point results in ac0 (fr0 in Unix assembler syntax).
-
@opindex mno-ac0
-@item -mno-ac0
-Return floating-point results in memory. This is the default.
+@item -mac0
+@itemx -mno-ac0
+With @option{-mac0}, return floating-point results in ac0
+(fr0 in Unix assembler syntax). The default, @option{-mno-ac0}, is
+to return floating-point results in memory.
@opindex m40
+@opindex mno-40
@item -m40
-Generate code for a PDP-11/40. Implies -msoft-float -mno-split.
+Generate code for a PDP-11/40.
+Implies @option{-msoft-float} @option{-mno-split}.
@opindex m45
+@opindex mno-45
@item -m45
Generate code for a PDP-11/45. This is the default.
@opindex m10
@item -m10
-Generate code for a PDP-11/10. Implies -msoft-float -mno-split.
+Generate code for a PDP-11/10.
+Implies @option{-msoft-float} @option{-mno-split}.
@opindex mint16
@opindex mno-int32
@@ -31714,8 +31718,9 @@ Use 16-bit @code{int}. This is the default.
Use 32-bit @code{int}.
@opindex msplit
+@opindex mno-split
@item -msplit
-Target has split instruction and data space. Implies -m45.
+Target has split instruction and data space. Implies @option{-m45}.
@opindex munix-asm
@item -munix-asm
@@ -31730,6 +31735,7 @@ Use DEC assembler syntax.
Use GNU assembler syntax. This is the default.
@opindex mlra
+@opindex mno-lra
@item -mlra
Use the new LRA register allocator. By default, the old ``reload''
allocator is used.
--
2.39.5
