rtlanal.h File Reference

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Data Structures
class	rtx_obj_reference
class	rtx_properties
class	growing_rtx_properties< Base >
class	vec_rtx_properties_base

Namespaces
namespace	rtx_obj_flags

Typedefs
using	vec_rtx_properties = growing_rtx_properties<vec_rtx_properties_base>

Functions
bool	vec_series_highpart_p (machine_mode result_mode, machine_mode op_mode, rtx sel)
bool	vec_series_lowpart_p (machine_mode result_mode, machine_mode op_mode, rtx sel)
bool	contains_paradoxical_subreg_p (rtx x)

Variables
const unsigned int	MEM_REGNO = ~0U
const uint16_t	rtx_obj_flags::IS_READ = 1U << 0
const uint16_t	rtx_obj_flags::IS_WRITE = 1U << 1
const uint16_t	rtx_obj_flags::IS_CLOBBER = 1U << 2
const uint16_t	rtx_obj_flags::IS_PRE_POST_MODIFY = 1U << 3
const uint16_t	rtx_obj_flags::IS_MULTIREG = 1U << 4
const uint16_t	rtx_obj_flags::IN_MEM_LOAD = 1U << 5
const uint16_t	rtx_obj_flags::IN_MEM_STORE = 1U << 6
const uint16_t	rtx_obj_flags::IN_SUBREG = 1U << 7
const uint16_t	rtx_obj_flags::IN_NOTE = 1U << 8
static const uint16_t	rtx_obj_flags::STICKY_FLAGS = IN_NOTE

Typedef Documentation

vec_rtx_properties

using vec_rtx_properties = growing_rtx_properties<vec_rtx_properties_base>

A rtx_properties that stores its references in a temporary array.
Like auto_vec, the array is initially on the stack, but can switch
to the heap if necessary.

The reason for implementing this as a derived class is that the
default on-stack size should be enough for the vast majority of
expressions and instructions.  It's therefore not worth paying
the cost of conditionally calling grow code at every site that
records a new reference.  Instead, the rtx_properties code can use
trivial iterator updates for the common case, and in the rare case
that the vector needs to be resized, we can pay the cost of
collecting the references a second time.   

Function Documentation

contains_paradoxical_subreg_p()

bool contains_paradoxical_subreg_p

(

rtx

x

)

Return true if X contains a paradoxical subreg.   

References FOR_EACH_SUBRTX_VAR, paradoxical_subreg_p(), and SUBREG_P.

Referenced by forward_propagate_and_simplify(), try_fwprop_subst_pattern(), and try_replace_reg().

vec_series_highpart_p()

bool vec_series_highpart_p	(	machine_mode	result_mode,
		machine_mode	op_mode,
		rtx	sel )

Return true if, for all OP of mode OP_MODE:

  (vec_select:RESULT_MODE OP SEL)

is equivalent to the highpart RESULT_MODE of OP.   

References GET_MODE_NUNITS(), offset, rtvec_series_p(), targetm, XVEC, and XVECLEN.

Referenced by simplify_context::simplify_binary_operation_1().

vec_series_lowpart_p()

bool vec_series_lowpart_p	(	machine_mode	result_mode,
		machine_mode	op_mode,
		rtx	sel )

Return true if, for all OP of mode OP_MODE:

  (vec_select:RESULT_MODE OP SEL)

is equivalent to the lowpart RESULT_MODE of OP.   

References GET_MODE_NUNITS(), offset, rtvec_series_p(), targetm, XVEC, and XVECLEN.

Referenced by combine_simplify_rtx(), fold_rtx(), and simplify_context::simplify_binary_operation_1().

Variable Documentation

MEM_REGNO

const unsigned int MEM_REGNO = ~0U

Analyze RTL for GNU compiler.
   Copyright (C) 2020-2024 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.   

Note that for historical reasons, many rtlanal.cc functions are
declared in rtl.h rather than here.   

A dummy register value that represents the whole of variable memory.
Using ~0U means that arrays that track both registers and memory can
be indexed by regno + 1.   

Referenced by rtx_obj_reference::is_mem(), rtx_obj_reference::is_reg(), rtx_properties::try_to_add_dest(), rtx_properties::try_to_add_insn(), and rtx_properties::try_to_add_src().