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| author | Dan Nicolaescu <dann@ics.uci.edu> | 2003-04-10 05:24:26 +0000 |
|---|---|---|
| committer | Zack Weinberg <zack@gcc.gnu.org> | 2003-04-10 05:24:26 +0000 |
| commit | 496324d0a723cb9f3aa8fd82d114e74c4bd08834 (patch) | |
| tree | 461b3e6e929a2561f52acdd1f7f238f6a8fe775e /gcc/cse.c | |
| parent | 2363a51aeec978c105c9cff741d176a099a3eb10 (diff) | |
| download | gcc-496324d0a723cb9f3aa8fd82d114e74c4bd08834.zip gcc-496324d0a723cb9f3aa8fd82d114e74c4bd08834.tar.gz gcc-496324d0a723cb9f3aa8fd82d114e74c4bd08834.tar.bz2 | |
regrename.c (struct du_chain): Use a bitfield for reg_class.
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.
From-SVN: r65419
Diffstat (limited to 'gcc/cse.c')
| -rw-r--r-- | gcc/cse.c | 16 |
1 files changed, 11 insertions, 5 deletions
@@ -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. */ |