[gcc r13-8123] extend.texi: Fix up defbuiltin* with spaces in return type

[Jakub Jelinek]

https://gcc.gnu.org/g:e1f959ee7380e9fc89aeb98d9e4d8ccf1c99ea26

commit r13-8123-ge1f959ee7380e9fc89aeb98d9e4d8ccf1c99ea26
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Dec 1 16:57:30 2023 +0100

    extend.texi: Fix up defbuiltin* with spaces in return type
    
    In https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005fstdc_005fbit_005ffloor
    I've noticed that while e.g. __builtin_stdc_bit_floor builtin is properly
    rendered in bold and bigger size, for the __builtin_stdc_bit_width builtin
    it is not the builtin name which is marked like that, but the keyword int
    before it.  Also, seems such builtins are missing from the index.
    
    I've read the texinfo docs and they seem to suggest in
    https://www.gnu.org/software/texinfo/manual/texinfo/html_node/Line-Macros.html
    that return types of functions with spaces in the return type should be
    wrapped with {}s and we already use that e.g. in
    @defbuiltin{{void *} __builtin_thread_pointer (void)}
    
    The following patch adjusts builtins I found which contained one or two
    spaces in the return type name (plus two spots which used 2 spaces after
    single keyword return type instead of 1 which triggered my search regex as
    well).
    
    2023-12-01  Jakub Jelinek  <jakub@redhat.com>
    
            * doc/extend.texi (__builtin_darn, __builtin_darn_raw,
            __builtin_ia32_vec_ext_v2di, __builtin_ia32_crc32qi,
            __builtin_ia32_crc32hi, __builtin_ia32_crc32si,
            __builtin_ia32_crc32di): Put {}s around return type with spaces in it.
            (__builtin_rx_mvfachi, __builtin_rx_mvfacmi): Remove superfluous
            whitespace.
    
    (cherry picked from commit ff99671ac3ea583a9d65c8c3cd3ff4aad1d68592)

Diff:
---
 gcc/doc/extend.texi | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 12c5ca507ed..d0e09046d91 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -18415,8 +18415,8 @@ round to odd as the rounding mode.
 The following additional built-in functions are also available for the
 PowerPC family of processors, starting with ISA 3.0 or later:
 
-@defbuiltin{long long __builtin_darn (void)}
-@defbuiltinx{long long __builtin_darn_raw (void)}
+@defbuiltin{{long long} __builtin_darn (void)}
+@defbuiltinx{{long long} __builtin_darn_raw (void)}
 @defbuiltinx{int __builtin_darn_32 (void)}
 The @code{__builtin_darn} and @code{__builtin_darn_raw}
 functions require a
@@ -21306,12 +21306,12 @@ multiplying the bottom 16 bits of the two arguments into the
 accumulator.
 @enddefbuiltin
 
-@defbuiltin{int  __builtin_rx_mvfachi (void)}
+@defbuiltin{int __builtin_rx_mvfachi (void)}
 Generates the @code{mvfachi} machine instruction to read the top
 32 bits of the accumulator.
 @enddefbuiltin
 
-@defbuiltin{int  __builtin_rx_mvfacmi (void)}
+@defbuiltin{int __builtin_rx_mvfacmi (void)}
 Generates the @code{mvfacmi} machine instruction to read the middle
 32 bits of the accumulator.
 @enddefbuiltin
@@ -22665,7 +22665,7 @@ Generates the @code{extractps} machine instruction.
 Generates the @code{pextrd} machine instruction.
 @enddefbuiltin
 
-@defbuiltin{long long __builtin_ia32_vec_ext_v2di (v2di, const int)}
+@defbuiltin{{long long} __builtin_ia32_vec_ext_v2di (v2di, const int)}
 Generates the @code{pextrq} machine instruction in 64bit mode.
 @enddefbuiltin
 
@@ -22694,19 +22694,19 @@ v2di __builtin_ia32_pcmpgtq (v2di, v2di);
 The following built-in functions are available when @option{-msse4.2} is
 used.
 
-@defbuiltin{unsigned int __builtin_ia32_crc32qi (unsigned int, unsigned char)}
+@defbuiltin{{unsigned int} __builtin_ia32_crc32qi (unsigned int, unsigned char)}
 Generates the @code{crc32b} machine instruction.
 @enddefbuiltin
 
-@defbuiltin{unsigned int __builtin_ia32_crc32hi (unsigned int, unsigned short)}
+@defbuiltin{{unsigned int} __builtin_ia32_crc32hi (unsigned int, unsigned short)}
 Generates the @code{crc32w} machine instruction.
 @enddefbuiltin
 
-@defbuiltin{unsigned int __builtin_ia32_crc32si (unsigned int, unsigned int)}
+@defbuiltin{{unsigned int} __builtin_ia32_crc32si (unsigned int, unsigned int)}
 Generates the @code{crc32l} machine instruction.
 @enddefbuiltin
 
-@defbuiltin{unsigned long long __builtin_ia32_crc32di (unsigned long long, unsigned long long)}
+@defbuiltin{{unsigned long long} __builtin_ia32_crc32di (unsigned long long, unsigned long long)}
 Generates the @code{crc32q} machine instruction.
 @enddefbuiltin