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Diffstat (limited to 'gcc-4.9/gcc/doc/extend.texi')
| -rw-r--r-- | gcc-4.9/gcc/doc/extend.texi | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/doc/extend.texi b/gcc-4.9/gcc/doc/extend.texi index 4c0914a35..dfef30042 100644 --- a/gcc-4.9/gcc/doc/extend.texi +++ b/gcc-4.9/gcc/doc/extend.texi @@ -4088,6 +4088,25 @@ Specify which floating-point unit to use. The @code{target("fpmath=sse,387")} option must be specified as @code{target("fpmath=sse+387")} because the comma would separate different options. + +@item indirect_branch("@var{choice}") +@cindex @code{indirect_branch} function attribute, x86 +On x86 targets, the @code{indirect_branch} attribute causes the compiler +to convert indirect call and jump with @var{choice}. @samp{keep} +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. + +@item function_return("@var{choice}") +@cindex @code{function_return} function attribute, x86 +On x86 targets, the @code{function_return} attribute causes the compiler +to convert function return with @var{choice}. @samp{keep} 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. @end table On the PowerPC, the following options are allowed: |