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| author | Steven Bosscher <steven@gcc.gnu.org> | 2013-04-05 19:23:17 +0000 |
|---|---|---|
| committer | Steven Bosscher <steven@gcc.gnu.org> | 2013-04-05 19:23:17 +0000 |
| commit | 7bca81dc6a2606caeb675fb74afdad5f2a86d44a (patch) | |
| tree | cc55e3c8d03e775e0ae127a1d61cb22dd0973f7f /gcc/rtl.def | |
| parent | 4542a38a21fea54d28d2d2b34ef8e12ebb7ca415 (diff) | |
| download | gcc-7bca81dc6a2606caeb675fb74afdad5f2a86d44a.zip gcc-7bca81dc6a2606caeb675fb74afdad5f2a86d44a.tar.gz gcc-7bca81dc6a2606caeb675fb74afdad5f2a86d44a.tar.bz2 | |
bb-reorder.c (fix_crossing_unconditional_branches): Remove a set-but-unused variable.
* bb-reorder.c (fix_crossing_unconditional_branches): Remove a
set-but-unused variable.
* cgraph.c (cgraph_release_function_body): Clear cfun->cfg to make
basic blocks of released function bodies garbage-collectable.
* ree.c (find_and_remove_re): Do not call df_finish_pass here.
(struct rtl_opt_pass): Add TODO_df_finish.
* rtl.def (DEFINE_SUBST, DEFINE_SUBST_ATTR): Add documentation.
From-SVN: r197533
Diffstat (limited to 'gcc/rtl.def')
| -rw-r--r-- | gcc/rtl.def | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/gcc/rtl.def b/gcc/rtl.def index 47a3762..5da3dd3 100644 --- a/gcc/rtl.def +++ b/gcc/rtl.def @@ -1290,8 +1290,41 @@ DEF_RTL_EXPR (ATTR_FLAG, "attr_flag", "s", RTX_EXTRA) true, the second operand will be used as the value of the conditional. */ DEF_RTL_EXPR(COND, "cond", "Ee", RTX_EXTRA) +/* Definition of a pattern substitution meta operation on a DEFINE_EXPAND + or a DEFINE_INSN. Automatically generates new instances of DEFINE_INSNs + that match the substitution pattern. + + Operand: + 0: The name of the substitition template. + 1: Input template to match to see if a substitution is applicable. + 2: A C expression giving an additional condition for the generated + new define_expand or define_insn. + 3: Output tempalate to generate via substitution. + + Within a DEFINE_SUBST template, the meaning of some RTL expressions is + different from their usual interpretation: a MATCH_OPERAND matches any + expression tree with matching machine mode or with VOIDmode. Likewise, + MATCH_OP_DUP and MATCH_DUP match more liberally in a DEFINE_SUBST than + in other RTL expressions. MATCH_OPERATOR matches all common operators + but also UNSPEC, UNSPEC_VOLATILE, and MATCH_OPERATORS from the input + DEFINE_EXPAND or DEFINE_INSN. */ DEF_RTL_EXPR(DEFINE_SUBST, "define_subst", "sEsE", RTX_EXTRA) + +/* Substitution attribute to apply a DEFINE_SUBST to a pattern. + + Operand: + 0: The name of the subst-attribute. + 1: The name of the DEFINE_SUBST to be applied for this attribute. + 2: String to substitute for the subst-attribute name in the pattern + name, for the case that the DEFINE_SUBST is not applied (i.e. the + unmodified version of the pattern). + 3: String to substitute for the subst-attribute name in the pattern + name, for the case that the DEFINE_SUBST is applied to the patten. + + The use of DEFINE_SUBST and DEFINE_SUBST_ATTR is explained in the + GCC internals manual, under "RTL Templates Transformations". */ DEF_RTL_EXPR(DEFINE_SUBST_ATTR, "define_subst_attr", "ssss", RTX_EXTRA) + #endif /* GENERATOR_FILE */ /* |