From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 1E1CE3831380; Fri, 21 Jun 2024 19:55:50 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1E1CE3831380 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1718999750; bh=qsDpzzlEvagWVFirOT9LMetLRVj/k7k3OF5CDrWFQVs=; h=From:To:Subject:Date:In-Reply-To:References:From; b=gGa4DlS9i/FbIepOX4wdvB6+eSTQ/Ua2BsGM+d9vtdENDOUhs3bwZplKet4EAXWi8 Ry4BjkaUNDzVsoyk3fSpjH2ZgeqghITJYv0vURsI/IFAUVmSJ/HFq6u+YK4giFjKs4 5MGtZgNegGZZZbMk3onA3rB2ZIYDgiBnI/IhmW8Q= From: "gjl at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/114243] [13/14/15 Regression][avr] -fsplit-wide-types bloats code by more than 50% Date: Fri, 21 Jun 2024 19:55:49 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Version: 14.0 X-Bugzilla-Keywords: missed-optimization, ra X-Bugzilla-Severity: normal X-Bugzilla-Who: gjl at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.created Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114243 --- Comment #4 from Georg-Johann Lay --- Created attachment 58483 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D58483&action=3Dedit sfmode.c: C test case This is a test case with simpler functions like float add2 (float a, float b) { return a + b; } v8 compiles this with -Os -dp to: add2: rcall __addsf3 ; 9 [c=3D24 l=3D1] call_value_insn/1 ret ; 21 [c=3D0 l=3D1] return but the current compiler does: add2: push r4 ; 76 [c=3D4 l=3D1] pushqi1/0 push r5 ; 77 [c=3D4 l=3D1] pushqi1/0 push r6 ; 78 [c=3D4 l=3D1] pushqi1/0 push r7 ; 79 [c=3D4 l=3D1] pushqi1/0 push r8 ; 80 [c=3D4 l=3D1] pushqi1/0 push r9 ; 81 [c=3D4 l=3D1] pushqi1/0 push r10 ; 82 [c=3D4 l=3D1] pushqi1/0 push r11 ; 83 [c=3D4 l=3D1] pushqi1/0 push r12 ; 84 [c=3D4 l=3D1] pushqi1/0 push r13 ; 85 [c=3D4 l=3D1] pushqi1/0 push r14 ; 86 [c=3D4 l=3D1] pushqi1/0 push r15 ; 87 [c=3D4 l=3D1] pushqi1/0 /* prologue: function */ /* frame size =3D 0 */ /* stack size =3D 12 */ .L__stack_usage =3D 12 mov r4,r18 ; 61 [c=3D4 l=3D1] movqi_insn/0 mov r5,r19 ; 62 [c=3D4 l=3D1] movqi_insn/0 mov r6,r20 ; 63 [c=3D4 l=3D1] movqi_insn/0 mov r7,r21 ; 64 [c=3D4 l=3D1] movqi_insn/0 mov r21,r7 ; 65 [c=3D4 l=3D4] *movsf/0 mov r20,r6 mov r19,r5 mov r18,r4 mov r8,r22 ; 66 [c=3D4 l=3D1] movqi_insn/0 mov r9,r23 ; 67 [c=3D4 l=3D1] movqi_insn/0 mov r10,r24 ; 68 [c=3D4 l=3D1] movqi_insn/0 mov r11,r25 ; 69 [c=3D4 l=3D1] movqi_insn/0 mov r25,r11 ; 70 [c=3D4 l=3D4] *movsf/0 mov r24,r10 mov r23,r9 mov r22,r8 rcall __addsf3 ; 9 [c=3D24 l=3D1] call_value_insn/1 mov r12,r22 ; 71 [c=3D4 l=3D1] movqi_insn/0 mov r13,r23 ; 72 [c=3D4 l=3D1] movqi_insn/0 mov r14,r24 ; 73 [c=3D4 l=3D1] movqi_insn/0 mov r15,r25 ; 74 [c=3D4 l=3D1] movqi_insn/0 mov r25,r15 ; 75 [c=3D4 l=3D4] *movsf/0 mov r24,r14 mov r23,r13 mov r22,r12 /* epilogue start */ pop r15 ; 90 [c=3D4 l=3D1] popqi pop r14 ; 91 [c=3D4 l=3D1] popqi pop r13 ; 92 [c=3D4 l=3D1] popqi pop r12 ; 93 [c=3D4 l=3D1] popqi pop r11 ; 94 [c=3D4 l=3D1] popqi pop r10 ; 95 [c=3D4 l=3D1] popqi pop r9 ; 96 [c=3D4 l=3D1] popqi pop r8 ; 97 [c=3D4 l=3D1] popqi pop r7 ; 98 [c=3D4 l=3D1] popqi pop r6 ; 99 [c=3D4 l=3D1] popqi pop r5 ; 100 [c=3D4 l=3D1] popqi pop r4 ; 101 [c=3D4 l=3D1] popqi ret ; 102 [c=3D0 l=3D1] return_from_epilogue=