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rtl-ssa: Provide easier access to debug uses [PR113089]

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This patch adds some accessors to set_info and use_info to make it
easier to get at and iterate through uses in debug insns.

It is used by the aarch64 load/store pair fusion pass in a subsequent
patch to fix PR113089, i.e. to update debug uses in the pass.

gcc/ChangeLog:

	PR target/113089
	* rtl-ssa/accesses.h (use_info::next_debug_insn_use): New.
	(debug_insn_use_iterator): New.
	(set_info::first_debug_insn_use): New.
	(set_info::debug_insn_uses): New.
	* rtl-ssa/member-fns.inl (use_info::next_debug_insn_use): New.
	(set_info::first_debug_insn_use): New.
	(set_info::debug_insn_uses): New.
This commit is contained in:
Alex Coplan 2024-01-16 21:20:20 +00:00
parent 639ae54344
commit cef6031694
2 changed files with 42 additions and 0 deletions
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13
gcc/rtl-ssa/accesses.h
View file

@ -357,6 +357,10 @@ public:
// next_use () && next_use ()->is_in_any_insn () ? next_use () : nullptr
use_info *next_any_insn_use () const;
// Return the next use by a debug instruction, or null if none.
// This is only valid if if is_in_debug_insn ().
use_info *next_debug_insn_use () const;
// Return the previous use by a phi node in the list, or null if none.
//
// This is only valid if is_in_phi (). It is equivalent to:
@ -458,6 +462,8 @@ using reverse_use_iterator = list_iterator<use_info, &use_info::prev_use>;
// of use in the same definition.
using nondebug_insn_use_iterator
= list_iterator<use_info, &use_info::next_nondebug_insn_use>;
using debug_insn_use_iterator
= list_iterator<use_info, &use_info::next_debug_insn_use>;
using any_insn_use_iterator
= list_iterator<use_info, &use_info::next_any_insn_use>;
using phi_use_iterator = list_iterator<use_info, &use_info::prev_phi_use>;
@ -680,6 +686,10 @@ public:
use_info *first_nondebug_insn_use () const;
use_info *last_nondebug_insn_use () const;
// Return the first use of the set by debug instructions, or null if
// there is no such use.
use_info *first_debug_insn_use () const;
// Return the first use of the set by any kind of instruction, or null
// if there are no such uses. The uses are in the order described above.
use_info *first_any_insn_use () const;
@ -731,6 +741,9 @@ public:
// List the uses of the set by nondebug instructions, in reverse postorder.
iterator_range<nondebug_insn_use_iterator> nondebug_insn_uses () const;
// List the uses of the set by debug instructions, in reverse postorder.
iterator_range<debug_insn_use_iterator> debug_insn_uses () const;
// Return nondebug_insn_uses () in reverse order.
iterator_range<reverse_use_iterator> reverse_nondebug_insn_uses () const;

29
gcc/rtl-ssa/member-fns.inl
View file

@ -119,6 +119,15 @@ use_info::next_any_insn_use () const
return nullptr;
}
inline use_info *
use_info::next_debug_insn_use () const
{
if (auto use = next_use ())
if (use->is_in_debug_insn ())
return use;
return nullptr;
}
inline use_info *
use_info::prev_phi_use () const
{
@ -212,6 +221,20 @@ set_info::last_nondebug_insn_use () const
return nullptr;
}
inline use_info *
set_info::first_debug_insn_use () const
{
use_info *use;
if (has_nondebug_insn_uses ())
use = last_nondebug_insn_use ()->next_use ();
else
use = first_use ();
if (use && use->is_in_debug_insn ())
return use;
return nullptr;
}
inline use_info *
set_info::first_any_insn_use () const
{
@ -310,6 +333,12 @@ set_info::nondebug_insn_uses () const
return { first_nondebug_insn_use (), nullptr };
}
inline iterator_range<debug_insn_use_iterator>
set_info::debug_insn_uses () const
{
return { first_debug_insn_use (), nullptr };
}
inline iterator_range<reverse_use_iterator>
set_info::reverse_nondebug_insn_uses () const
{