[gcc r13-5194] docs: Add popcount, clz and ctz target attributes

[gcc r13-5194] docs: Add popcount, clz and ctz target attributes

[Andrew Carlotti]

https://gcc.gnu.org/g:0419b9b80065ac2e01e4137b7efc149ee3b1bdd6

commit r13-5194-g0419b9b80065ac2e01e4137b7efc149ee3b1bdd6
Author: Andrew Carlotti <andrew.carlotti@arm.com>
Date:   Mon Dec 12 13:54:47 2022 +0000

    docs: Add popcount, clz and ctz target attributes
    
    gcc/ChangeLog:
    
            * doc/sourcebuild.texi: Add missing target attributes.

Diff:
---
 gcc/doc/sourcebuild.texi | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi
index 562be485ce8..aefafc87e27 100644
--- a/gcc/doc/sourcebuild.texi
+++ b/gcc/doc/sourcebuild.texi
@@ -2515,6 +2515,24 @@ Target supports the execution of @code{amx-fp16} instructions.
 @item cell_hw
 Test system can execute AltiVec and Cell PPU instructions.
 
+@item clz
+Target supports a clz optab on int.
+
+@item clzl
+Target supports a clz optab on long.
+
+@item clzll
+Target supports a clz optab on long long.
+
+@item ctz
+Target supports a ctz optab on int.
+
+@item ctzl
+Target supports a ctz optab on long.
+
+@item ctzll
+Target supports a ctz optab on long long.
+
 @item cmpccxadd
 Target supports the execution of @code{cmpccxadd} instructions.
 
@@ -2536,6 +2554,15 @@ Target does not require strict alignment.
 @item pie_copyreloc
 The x86-64 target linker supports PIE with copy reloc.
 
+@item popcount
+Target supports a popcount optab on int.
+
+@item popcountl
+Target supports a popcount optab on long.
+
+@item popcountll
+Target supports a popcount optab on long long.
+
 @item prefetchi
 Target supports the execution of @code{prefetchi} instructions.