From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1919 invoked by alias); 28 Nov 2008 18:02:58 -0000 Received: (qmail 6027 invoked by uid 48); 28 Nov 2008 18:01:28 -0000 Date: Fri, 28 Nov 2008 18:02:00 -0000 Message-ID: <20081128180128.6026.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug rtl-optimization/38272] [4.4 Regression] Revision 142207 caused libgomp.fortran/threadprivate2.f90 In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "hjl dot tools at gmail dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2008-11/txt/msg02484.txt.bz2 ------- Comment #3 from hjl dot tools at gmail dot com 2008-11-28 18:01 ------- Revision 142206 generates: Reloads for insn # 49 Reload 0: reload_in (SI) = (reg:SI 0 ax) reload_out (SI) = (reg:SI 1 dx [orig:62 D.2019 ] [62]) GENERAL_REGS, RELOAD_OTHER (opnum = 0) reload_in_reg: (reg:SI 63 [ D.2018 ]) reload_out_reg: (reg:SI 1 dx [orig:62 D.2019 ] [62]) reload_reg_rtx: (reg:SI 1 dx [orig:62 D.2019 ] [62]) Reload 1: reload_in (SI) = (reg:SI 65 [ ivtmp.93 ]) GENERAL_REGS, RELOAD_FOR_INPUT (opnum = 2), optional reload_in_reg: (reg:SI 65 [ ivtmp.93 ]) (insn 49 168 50 3 /tmp/foo.f90:6 (parallel [ (set (reg:SI 1 dx [orig:62 D.2019 ] [62]) (mult:SI (reg:SI 1 dx [orig:62 D.2019 ] [62]) (mem/c:SI (plus:SI (reg/f:SI 6 bp) (const_int -48 [0xffffffffffffffd0])) [0 %sfp+-24 S4 A32]))) (clobber (reg:CC 17 flags)) ]) 333 {*mulsi3_1} (nil)) 407 movl __threadprivate2_MOD_foo@INDNTPOFF, %edx 408 movl %gs:(%edx), %eax 409 movl %eax, -60(%ebp) 410 movl %gs:4(%edx), %ecx 411 movl %gs:16(%edx), %edi 412 movl %gs:20(%edx), %ebx 413 movl %gs:28(%edx), %eax 414 movl %gs:32(%edx), %esi 415 movl %esi, -64(%ebp) 416 movl %gs:12(%edx), %esi 417 addl $16, %esp 418 cmpl -64(%ebp), %eax 419 jg .L53 420 movl %eax, -48(%ebp) 421 movl %gs:24(%edx), %eax 422 movl %eax, -56(%ebp) 423 movl %eax, %edx 424 imull -48(%ebp), %edx Revision 142207: Reloads for insn # 49 Reload 0: reload_in (SI) = (reg:SI 63 [ D.2018 ]) reload_out (SI) = (reg:SI 1 dx [orig:62 D.2019 ] [62]) GENERAL_REGS, RELOAD_OTHER (opnum = 0) reload_in_reg: (reg:SI 63 [ D.2018 ]) reload_out_reg: (reg:SI 1 dx [orig:62 D.2019 ] [62]) reload_reg_rtx: (reg:SI 1 dx [orig:62 D.2019 ] [62]) Reload 1: reload_in (SI) = (reg:SI 65 [ ivtmp.93 ]) GENERAL_REGS, RELOAD_FOR_INPUT (opnum = 2), optional reload_in_reg: (reg:SI 65 [ ivtmp.93 ]) reload_reg_rtx: (reg:SI 2 cx [80]) (insn 49 168 50 3 /tmp/foo.f90:6 (parallel [ (set (reg:SI 1 dx [orig:62 D.2019 ] [62]) (mult:SI (reg:SI 1 dx [orig:62 D.2019 ] [62]) (reg:SI 2 cx [80]))) (clobber (reg:CC 17 flags)) ]) 333 {*mulsi3_1} (nil)) Somehow IRA forgot ECX is used in insn 49 and used to load __threadprivate2_MOD_foo: 407 movl __threadprivate2_MOD_foo@INDNTPOFF, %ecx 408 movl %gs:(%ecx), %eax 409 movl %eax, -60(%ebp) 410 movl %gs:4(%ecx), %eax 411 movl %gs:16(%ecx), %edi 412 movl %gs:20(%ecx), %ebx 413 movl %gs:28(%ecx), %edx 414 movl %gs:32(%ecx), %esi 415 movl %esi, -64(%ebp) 416 movl %gs:12(%ecx), %esi 417 addl $16, %esp 418 cmpl -64(%ebp), %edx 419 jg .L53 420 movl %edx, -48(%ebp) 421 movl %gs:24(%ecx), %edx 422 movl %edx, -56(%ebp) 423 imull %ecx, %edx <<< ECX doesn't have content at address -48(%ebp) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38272