This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

[RFC][PATCH 1/3] Free a bit in SSA_NAME to save wrapped information

From: Kugan <kugan dot vivekanandarajah at linaro dot org>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Cc: Richard Biener <rguenther at suse dot de>, Jakub Jelinek <jakub at redhat dot com>, Jeff Law <law at redhat dot com>
Date: Sat, 17 Jan 2015 13:06:58 +1100
Subject: [RFC][PATCH 1/3] Free a bit in SSA_NAME to save wrapped information
Authentication-results: sourceware.org; auth=none
References: <54B9C2EE dot 4050100 at linaro dot org>

Freeing a spare-bit to store wrapped attribute by going back to
representing VR_ANTI_RANGE as [max + 1, min - 1] in SSA_NAME.

Thanks,
Kugan

gcc/ChangeLog:

2015-01-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

	* tree-ssanames.c (set_range_info): Change range info representation
	  and represent VR_ANTI_RANGE as [max + 1, min - 1].
	(get_range_info): Likewise.
	(set_nonzero_bits): Likewise.
	(duplicate_ssa_name_range_info): Likewise.
	* tree-ssanames.h (set_range_info): Change prototype.
	(get_range_info): Likewise.
	(set_nonzero_bits): Likewise.
	(duplicate_ssa_name_range_info): Likewise.
	* tree-vrp.c (remove_range_assertions): Use new representation.
	(vrp_finalize): Likewise.

Attachment: patch1.txt
Description: Text document

References:
- [RFC][PATCH 0/3] Re-enable zero/sign extension elimination using value ranges
  - From: Kugan

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]