diff options
Diffstat (limited to 'gcc/df.h')
| -rw-r--r-- | gcc/df.h | 15 |
1 files changed, 11 insertions, 4 deletions
@@ -211,7 +211,12 @@ enum df_ref_flags DF_REF_IN_NOTE = 16, /* This flag is set if this ref is really a clobber, and not a def. */ - DF_REF_CLOBBER = 32 + DF_REF_CLOBBER = 32, + + /* True if ref is dead (i.e. the next ref is a def or clobber or + the end of the function.) This is only valid the RI problem + has been set in this df instance. */ + DF_REF_DIES_AFTER_THIS_USE = 64 }; @@ -223,7 +228,10 @@ struct df_ref rtx reg; /* The register referenced. */ unsigned int regno; /* The register number referenced. */ basic_block bb; /* Basic block containing the instruction. */ - rtx insn; /* Insn containing ref. NB: THIS MAY BE NULL. */ + + /* Insn containing ref. This will be null if this is an artificial + reference. */ + rtx insn; rtx *loc; /* The location of the reg. */ struct df_link *chain; /* Head of def-use, use-def. */ unsigned int id; /* Location in table. */ @@ -316,6 +324,7 @@ struct df struct df_insn_info **insns; /* Insn table, indexed by insn UID. */ unsigned int insns_size; /* Size of insn table. */ bitmap hardware_regs_used; /* The set of hardware registers used. */ + bitmap entry_block_defs; /* The set of hardware registers live on entry to the function. */ bitmap exit_block_uses; /* The set of hardware registers used in exit block. */ }; @@ -422,8 +431,6 @@ extern bitmap df_invalidated_by_call; /* Initialize ur_in and ur_out as if all hard registers were partially available. */ -extern bitmap df_all_hard_regs; - /* The way that registers are processed, especially hard registers, changes as the compilation proceeds. These states are passed to df_set_state to control this processing. */ |