diff options
| author | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-04-10 05:24:26 +0000 |
|---|---|---|
| committer | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-04-10 05:24:26 +0000 |
| commit | d8b9732d7479e3ae2862af1e6521003c46fc4824 (patch) | |
| tree | 461b3e6e929a2561f52acdd1f7f238f6a8fe775e /gcc/cse.c | |
| parent | b7ce161bca1c6644c6f202e60bfe0ba548b64c9c (diff) | |
| download | gcc-d8b9732d7479e3ae2862af1e6521003c46fc4824.tar.gz | |
2003-04-09 Dan Nicolaescu <dann@ics.uci.edu>
Zack Weinberg <zack@codesourcery.com>
* regrename.c (struct du_chain): Use a bitfield for reg_class.
* cse.c (struct qty_table_elem, struct table_elt, struct set):
Use bitfields for fields holding enum rtx_code or
enum machine_mode values. Add comments explaining size choices.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@65419 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/cse.c')
| -rw-r--r-- | gcc/cse.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/gcc/cse.c b/gcc/cse.c index 4109b58a868..a90f0d8979e 100644 --- a/gcc/cse.c +++ b/gcc/cse.c @@ -251,8 +251,10 @@ struct qty_table_elem rtx comparison_const; int comparison_qty; unsigned int first_reg, last_reg; - enum machine_mode mode; - enum rtx_code comparison_code; + /* The sizes of these fields should match the sizes of the + code and mode fields of struct rtx_def (see rtl.h). */ + ENUM_BITFIELD(rtx_code) comparison_code : 16; + ENUM_BITFIELD(machine_mode) mode : 8; }; /* The table of all qtys, indexed by qty number. */ @@ -462,7 +464,9 @@ struct table_elt struct table_elt *related_value; int cost; int regcost; - enum machine_mode mode; + /* The size of this field should match the size + of the mode field of struct rtx_def (see rtl.h). */ + ENUM_BITFIELD(machine_mode) mode : 8; char in_memory; char is_const; char flag; @@ -4712,8 +4716,10 @@ struct set /* Nonzero if the SET_SRC contains something whose value cannot be predicted and understood. */ char src_volatile; - /* Original machine mode, in case it becomes a CONST_INT. */ - enum machine_mode mode; + /* Original machine mode, in case it becomes a CONST_INT. + The size of this field should match the size of the mode + field of struct rtx_def (see rtl.h). */ + ENUM_BITFIELD(machine_mode) mode : 8; /* A constant equivalent for SET_SRC, if any. */ rtx src_const; /* Original SET_SRC value used for libcall notes. */ |