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-rw-r--r--gcc-4.9/gcc/doc/invoke.texi39
1 files changed, 38 insertions, 1 deletions
diff --git a/gcc-4.9/gcc/doc/invoke.texi b/gcc-4.9/gcc/doc/invoke.texi
index 698ecd6..297657a 100644
--- a/gcc-4.9/gcc/doc/invoke.texi
+++ b/gcc-4.9/gcc/doc/invoke.texi
@@ -694,7 +694,8 @@ Objective-C and Objective-C++ Dialects}.
-m32 -m64 -mx32 -m16 -mlarge-data-threshold=@var{num} @gol
-msse2avx -mfentry -m8bit-idiv @gol
-mavx256-split-unaligned-load -mavx256-split-unaligned-store @gol
--mstack-protector-guard=@var{guard}}
+-mstack-protector-guard=@var{guard} -mindirect-branch=@var{choice} @gol
+-mfunction-return=@var{choice} -mindirect-branch-register}
@emph{i386 and x86-64 Windows Options}
@gccoptlist{-mconsole -mcygwin -mno-cygwin -mdll @gol
@@ -16021,6 +16022,42 @@ locations are @samp{global} for global canary or @samp{tls} for per-thread
canary in the TLS block (the default). This option has effect only when
@option{-fstack-protector} or @option{-fstack-protector-all} is specified.
+@item -mindirect-branch=@var{choice}
+@opindex -mindirect-branch
+Convert indirect call and jump with @var{choice}. The default is
+@samp{keep}, which keeps indirect call and jump unmodified.
+@samp{thunk} converts indirect call and jump to call and return thunk.
+@samp{thunk-inline} converts indirect call and jump to inlined call
+and return thunk. @samp{thunk-extern} converts indirect call and jump
+to external call and return thunk provided in a separate object file.
+You can control this behavior for a specific function by using the
+function attribute @code{indirect_branch}. @xref{Function Attributes}.
+
+Note that @option{-mcmodel=large} is incompatible with
+@option{-mindirect-branch=thunk} nor
+@option{-mindirect-branch=thunk-extern} since the thunk function may
+not be reachable in large code model.
+
+@item -mfunction-return=@var{choice}
+@opindex -mfunction-return
+Convert function return with @var{choice}. The default is @samp{keep},
+which keeps function return unmodified. @samp{thunk} converts function
+return to call and return thunk. @samp{thunk-inline} converts function
+return to inlined call and return thunk. @samp{thunk-extern} converts
+function return to external call and return thunk provided in a separate
+object file. You can control this behavior for a specific function by
+using the function attribute @code{function_return}.
+@xref{Function Attributes}.
+
+Note that @option{-mcmodel=large} is incompatible with
+@option{-mfunction-return=thunk} nor
+@option{-mfunction-return=thunk-extern} since the thunk function may
+not be reachable in large code model.
+
+@item -mindirect-branch-register
+@opindex -mindirect-branch-register
+Force indirect call and jump via register.
+
@end table
These @samp{-m} switches are supported in addition to the above