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Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 14a78fd..a0f60e7 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -14649,12 +14649,14 @@ Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}. @item -fstrict-aliasing Allow the compiler to assume the strictest aliasing rules applicable to the language being compiled. For C (and C++), this activates -optimizations based on the type of expressions. In particular, an -object of one type is assumed never to reside at the same address as an -object of a different type, unless the types are almost the same. For -example, an @code{unsigned int} can alias an @code{int}, but not a -@code{void*} or a @code{double}. A character type may alias any other -type. +optimizations based on the type of expressions. In particular, accessing +an object of one type via an expression of a different type is not allowed, +unless the types are @dfn{compatible types}, differ only in signedness or +qualifiers, or the expression has a character type. Accessing scalar +objects via a corresponding vector type is also allowed. + +For example, an @code{unsigned int} can alias an @code{int}, but not a +@code{void*} or a @code{double}. A character type may alias any other type. @anchor{Type-punning}Pay special attention to code like this: @smallexample @@ -16895,11 +16897,6 @@ Maximum depth of recursive cloning for self-recursive function. Recursive cloning only when the probability of call being executed exceeds the parameter. -@item ipa-cp-profile-count-base -When using @option{-fprofile-use} option, IPA-CP will consider the measured -execution count of a call graph edge at this percentage position in their -histogram as the basis for its heuristics calculation. - @item ipa-cp-recursive-freq-factor The number of times interprocedural copy propagation expects recursive functions to call themselves. @@ -16961,6 +16958,19 @@ Size of max partition for WHOPR (in estimated instructions). to provide an upper bound for individual size of partition. Meant to be used only with balanced partitioning. +@item lto-partition-locality-frequency-cutoff +The denominator n of fraction 1/n of the execution frequency of callee to be +cloned for a particular caller. Special value of 0 dictates to always clone +without a cut-off. + +@item lto-partition-locality-size-cutoff +Size cut-off for callee including inlined calls to be cloned for a particular +caller. + +@item lto-max-locality-partition +Maximal size of a locality partition for LTO (in estimated instructions). +Value of 0 results in default value being used. + @item lto-max-streaming-parallelism Maximal number of parallel processes used for LTO streaming. @@ -31502,8 +31512,9 @@ Permissible values for this option are: @samp{sifive-e20}, @samp{sifive-e21}, @samp{sifive-e24}, @samp{sifive-e31}, @samp{sifive-e34}, @samp{sifive-e76}, @samp{sifive-s21}, @samp{sifive-s51}, @samp{sifive-s54}, @samp{sifive-s76}, @samp{sifive-u54}, @samp{sifive-u74}, @samp{sifive-x280}, @samp{sifive-xp450}, -@samp{sifive-x670}, @samp{thead-c906}, @samp{tt-ascalon-d8}, -@samp{xiangshan-nanhu}. +@samp{sifive-x670}, @samp{thead-c906}, @samp{tt-ascalon-d8}, @samp{xiangshan-nanhu}, +@samp{xt-c908}, @samp{xt-c908v}, @samp{xt-c910}, @samp{xt-c910v2}, +@samp{xt-c920}, @samp{xt-c920v2}. Note that @option{-mcpu} does not override @option{-march} or @option{-mtune}. |