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Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index e2d5e5f..81c63b7 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -2903,6 +2903,10 @@ This hook defines a class of registers which could be used for spilling pseudos This hook defines the machine mode to use for the boolean result of conditional store patterns. The ICODE argument is the instruction code for the cstore being performed. Not definiting this hook is the same as accepting the mode encoded into operand 0 of the cstore expander patterns. @end deftypefn +@deftypefn {Target Hook} int TARGET_COMPUTE_PRESSURE_CLASSES (enum reg_class *@var{pressure_classes}) +A target hook which lets a backend compute the set of pressure classes to be used by those optimization passes which take register pressure into account, as opposed to letting IRA compute them. It returns the number of register classes stored in the array @var{pressure_classes}. +@end deftypefn + @node Stack and Calling @section Stack Layout and Calling Conventions @cindex calling conventions |