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Diffstat (limited to 'contrib/perl5/ext/B/ramblings/cc.notes')
| -rw-r--r-- | contrib/perl5/ext/B/ramblings/cc.notes | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/contrib/perl5/ext/B/ramblings/cc.notes b/contrib/perl5/ext/B/ramblings/cc.notes deleted file mode 100644 index 47bd65a..0000000 --- a/contrib/perl5/ext/B/ramblings/cc.notes +++ /dev/null @@ -1,32 +0,0 @@ -At entry to each basic block, the following can be assumed (and hence -must be forced where necessary at the end of each basic block): - -The shadow stack @stack is empty. -For each lexical object in @pad, VALID_IV holds for each T_INT, -VALID_DOUBLE holds for each T_DOUBLE and VALID_SV holds otherwise. -The C shadow variable sp holds the stack pointer (not necessarily stack_sp). - -write_back_stack - Writes the contents of the shadow stack @stack back to the real stack. - A write-back of each object in the stack is forced so that its - backing SV contains the right value and that SV is then pushed onto the - real stack. On return, @stack is empty. - -write_back_lexicals - Forces a write-back (i.e. achieves VALID_SV), where necessary, for each - lexical object in @pad. Objects with the TEMPORARY flag are skipped. If - write_back_lexicals is called with an (optional) argument, then it is - taken to be a bitmask of more flags: any lexical object with one of those - flags set is also skipped and not written back to its SV. - -invalidate_lexicals($avoid) - The VALID_INT and VALID_DOUBLE flags are turned off for each lexical - object in @pad whose flags field doesn't overlap with $avoid. - -reload_lexicals - For each necessary lexical object in @pad, makes sure that VALID_IV - holds for objects of type T_INT, VALID_DOUBLE holds for objects for - type T_DOUBLE, and VALID_SV holds for other objects. An object is - considered for reloading if its flags field does not overlap with the - (optional) argument passed to reload_lexicals. - |
