• Partial_Transitions

Partial_Transitions are incomplete transitions from one style of doing something to a newer style.

The following are some of the Partial_Transitions occurring in GCC now. Some of these are also noted in general_backend_cleanup.

• define_peephole to define_peephole2

• ASM prologues and epiloges to RTL prologues and epilogues.

• Convert uses in the middle and back ends to fold_convert (only tree-mudflap.c is left). A rough list of uses can be found with

  • grep "convert (" *.[ch] | grep -w convert | grep -v ^c- | grep -v ^convert.c

• fold_convert (TYPE, integer_{one,zero}_node) to build_int_cst (type, {0,1})

• VARRAY to VEC

• converting libobjc not to use gcc's config header files

• convert RTL passes to use cfglayout_mode

• replace uses of note_uses with lookups in the DF_INSN_USES cache.

• replace uses of note_stores with lookups in the DF_INSN_DEFS cache.

• Convert all uses of TARGET_STRIP_NAME_ENCODING to SYMBOL_REF_FLAGS

• Use TARGET_FUNCTION_VALUE instead of FUNCTION_VALUE and/or FUNCTION_OUTGOING_VALUE.

• Use the PowerPC style soft floating point support in other ports.

  • stop using fp-bit.c (see rs6000/t-fprules-softfp and rs6000/sfp-machine.h