Fix doc for `-opt-bisect-limit`: the LTO option is linker specific

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294725 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/docs/OptBisect.rst b/docs/OptBisect.rst
index e9f1c2541c9c0a94d9d44be1ea3e0ae5da8c6655..a9ac227a2af542a9139b64143a4a5b45b7780d3d 100644 (file)
--- a/docs/OptBisect.rst
+++ b/docs/OptBisect.rst
@@ -60,12 +60,15 @@ like this:
   clang -O2 -mllvm -opt-bisect-limit=256 my_file.c
 
 The -opt-bisect-limit option may also be applied to link-time optimizations by
-using a prefix to indicate that this is a plug-in option for the linker.  The
+using a prefix to indicate that this is a plug-in option for the linker. The
 following syntax will set a bisect limit for LTO transformations:
 
 ::
 
+  # When using Gold or lld
   clang -flto -Wl,-plugin-opt,-opt-bisect-limit=256 my_file.o my_other_file.o
+  # When using ld64 (macOS)
+  clang -flto -Wl,-mllvm,-opt-bisect-limit=256 my_file.o my_other_file.o
 
 LTO passes are run by a library instance invoked by the linker. Therefore any
 passes run in the primary driver compilation phase are not affected by options