[PATCH 6/8 v2] docs: Add popcount, clz and ctz target attributes

[Andrew Carlotti via Gcc-patches]

Updated to reflect Sphinx revert; I'll commit this once the
cltz_complement patch is merged.

gcc/ChangeLog:

        * doc/sourcebuild.texi: Add missing target attributes.

---

diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi
index 
ffe69d6fcb9c46cf97ba570e85b56e586a0c9b99..1036b185ee289bbf7883bd14956a41da9a6d677b
 100644
--- a/gcc/doc/sourcebuild.texi
+++ b/gcc/doc/sourcebuild.texi
@@ -2511,6 +2511,24 @@ 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.
 
@@ -2532,6 +2550,15 @@ 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.