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| author | Jeffrey A Law <law@cygnus.com> | 1998-06-17 11:44:02 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-06-17 05:44:02 -0600 |
| commit | dbecbbe48af59a29adadd6e6dc8895e64764adb4 (patch) | |
| tree | 5f8204f11538f0d3f56395877d68c0bbfd75f9b7 /gcc/tm.texi | |
| parent | a5b8127eb13cce7fa4ddf8e4337f6e9fe67d1dc4 (diff) | |
| download | gcc-dbecbbe48af59a29adadd6e6dc8895e64764adb4.zip gcc-dbecbbe48af59a29adadd6e6dc8895e64764adb4.tar.gz gcc-dbecbbe48af59a29adadd6e6dc8895e64764adb4.tar.bz2 | |
expr.c (check_max_integer_computation_mode): New function.
* expr.c (check_max_integer_computation_mode): New function.
(expand_expr): Avoid integer computations in modes wider than
MAX_INTEGER_COMPUTATION_MODE.
* fold-const.c (fold): Likewise.
* tree.h (check_max_integer_computation_mode): Declare.
* tm.texi (MAX_INTEGER_COMPUTATION_MODE): Document it.
From-SVN: r20538
Diffstat (limited to 'gcc/tm.texi')
| -rw-r--r-- | gcc/tm.texi | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/tm.texi b/gcc/tm.texi index b03e791..a4fb481 100644 --- a/gcc/tm.texi +++ b/gcc/tm.texi @@ -7417,4 +7417,12 @@ A C expression that returns how many instructions can be issued at the same time if the machine is a superscalar machine. This is only used by the @samp{Haifa} scheduler, and not the traditional scheduler. +@findex MAX_INTEGER_COMPUTATION_MODE +@item MAX_INTEGER_COMPUTATION_MODE +Define this to the largest integer machine mode which can be used for +operations other than load, store and copy operations. + +You need only define this macro if the target holds values larger than +@code{word_mode} in general purpose registers. Most targets should not define +this macro. @end table |