From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 7856) id A57103858407; Fri, 29 Apr 2022 07:02:08 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A57103858407 To: gcc-cvs-wwwdocs@gcc.gnu.org Subject: gcc-wwwdocs branch master updated. ae68cb61741297974f4a76dc7c8fc2ed7a3515c7 X-Git-Refname: refs/heads/master X-Git-Reftype: branch X-Git-Oldrev: 60f057d93758717de29d45f8ae2df846efd0101b X-Git-Newrev: ae68cb61741297974f4a76dc7c8fc2ed7a3515c7 Message-Id: <20220429070208.A57103858407@sourceware.org> Date: Fri, 29 Apr 2022 07:02:08 +0000 (GMT) From: Xi Ruoyao X-BeenThere: gcc-cvs-wwwdocs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-cvs-wwwdocs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Apr 2022 07:02:08 -0000 This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "gcc-wwwdocs". The branch, master has been updated via ae68cb61741297974f4a76dc7c8fc2ed7a3515c7 (commit) from 60f057d93758717de29d45f8ae2df846efd0101b (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit ae68cb61741297974f4a76dc7c8fc2ed7a3515c7 Author: Xi Ruoyao Date: Sat Apr 2 00:23:18 2022 +0800 document zero-width field ABI changes on MIPS diff --git a/htdocs/gcc-12/changes.html b/htdocs/gcc-12/changes.html index e9f132c0..5281c966 100644 --- a/htdocs/gcc-12/changes.html +++ b/htdocs/gcc-12/changes.html @@ -50,6 +50,10 @@ a work-in-progress.

(so there is a C++ ABI incompatibility, GCC 4.4 and earlier compatible with GCC 12 or later, incompatible with GCC 4.5 through GCC 11). RISC-V has changed the handling of these already starting with GCC 10. + As the ABI requires, MIPS takes them into account handling function + return values so there is a C++ ABI incompatibility with GCC 4.5 + through 11. For function arguments on MIPS, refer to + the MIPS specific entry. GCC 12 on the above targets will report such incompatibilities as warnings or other diagnostics unless -Wno-psabi is used. @@ -656,7 +660,26 @@ function Multiply (S1, S2 : Sign) return Sign is - +

MIPS

+
    +
  • The ABI passing arguments + containing zero-width fields (for example, C/C++ zero-width + bit-fields, GNU C/C++ zero-length arrays, and GNU C empty structs) + has changed. Now a zero-width field will not prevent an aligned + 64-bit floating-point field next to it from being passed through + FPR. This is compatible with LLVM, but incompatible with previous + GCC releases. GCC 12 on MIPS will report such incompatibilities as + an inform unless -Wno-psabi is used. +
    • +
  • The ABI returning values + containing C++17 empty bases has changed. Now an empty base will + not prevent an aggregate containing only one or two floating-point + fields from being returned through FPR. This is compatible with + GCC 6 and earlier, but incompatible with GCC 7 through 11. GCC 12 on + MIPS will report such incompatibilities as an inform unless + -Wno-psabi is used. +
    • +
----------------------------------------------------------------------- Summary of changes: htdocs/gcc-12/changes.html | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) hooks/post-receive -- gcc-wwwdocs