From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2092) id DD068385842E; Fri, 12 Aug 2022 16:30:53 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org DD068385842E Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Andrea Corallo To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/vendors/ARM/heads/arm-12-m-pacbti)] [PATCH 9/15] arm: Set again stack pointer as CFA reg when popping if necessary X-Act-Checkin: gcc X-Git-Author: Andrea Corallo X-Git-Refname: refs/vendors/ARM/heads/arm-12-m-pacbti X-Git-Oldrev: fd8e6bd5b965ef41299e6c78abb71e3cf70aaee7 X-Git-Newrev: 721d4af523814538f266e2d1efa9cfacf1176209 Message-Id: <20220812163053.DD068385842E@sourceware.org> Date: Fri, 12 Aug 2022 16:30:53 +0000 (GMT) X-BeenThere: gcc-cvs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Aug 2022 16:30:54 -0000 https://gcc.gnu.org/g:721d4af523814538f266e2d1efa9cfacf1176209 commit 721d4af523814538f266e2d1efa9cfacf1176209 Author: Andrea Corallo Date: Wed Aug 10 17:05:10 2022 +0200 [PATCH 9/15] arm: Set again stack pointer as CFA reg when popping if necessary Hi all, this patch enables 'arm_emit_multi_reg_pop' to set again the stack pointer as CFA reg when popping if this is necessary. /gcc/ * config/arm/arm.cc (arm_emit_multi_reg_pop): If the frame pointer was set define again the stack pointer as CFA reg when popping. Diff: --- gcc/config/arm/arm.cc | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/gcc/config/arm/arm.cc b/gcc/config/arm/arm.cc index c49c86e75b8..5380abeffe8 100644 --- a/gcc/config/arm/arm.cc +++ b/gcc/config/arm/arm.cc @@ -22311,8 +22311,18 @@ arm_emit_multi_reg_pop (unsigned long saved_regs_mask) REG_NOTES (par) = dwarf; if (!return_in_pc) - arm_add_cfa_adjust_cfa_note (par, UNITS_PER_WORD * num_regs, - stack_pointer_rtx, stack_pointer_rtx); + { + /* If the frame pointer was set define again the stack pointer + as CFA reg. */ + if (frame_pointer_needed) + { + RTX_FRAME_RELATED_P (par) = 1; + add_reg_note (par, REG_CFA_DEF_CFA, stack_pointer_rtx); + } + else + arm_add_cfa_adjust_cfa_note (par, UNITS_PER_WORD * num_regs, + stack_pointer_rtx, stack_pointer_rtx); + } } /* Generate and emit an insn pattern that we will recognize as a pop_multi