From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9583 invoked by alias); 9 Feb 2005 21:20:06 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 9083 invoked by uid 48); 9 Feb 2005 21:19:56 -0000 Date: Thu, 10 Feb 2005 00:44:00 -0000 Message-ID: <20050209211956.9074.qmail@sourceware.org> From: "Thomas dot Koenig at online dot de" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20050209124042.19848.Thomas.Koenig@online.de> References: <20050209124042.19848.Thomas.Koenig@online.de> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug driver/19848] "options passed" from -verbose-asm do not adequately reflect optimization X-Bugzilla-Reason: CC X-SW-Source: 2005-02/txt/msg00741.txt.bz2 List-Id: ------- Additional Comments From Thomas dot Koenig at online dot de 2005-02-09 21:19 ------- Same thing on i686-pc-linux-gnu with the gcc driver: $ cat main.c int main() { return 0; } $ gcc -S -fverbose-asm -o main-o0.s main.c $ gcc -S -fno-cprop-registers -fno-defer-pop -fno-guess-branch-probability -fno-if-conversion -fno-if-conversion2 -fno-loop-optimize -fno-merge-constants -fno-tree-ccp -fno-tree-ch -fno-tree-copyrename -fno-tree-dce -fno-tree-dominator-opts -fno-tree-dse -fno-tree-fre -fno-tree-lrs -fno-tree-sra -fno-tree-ter -fverbose-asm -O1 -o main-o1.s main.c $ diff -u main-o0.s main-o1.s --- main-o0.s 2005-02-09 22:17:54.000000000 +0100 +++ main-o1.s 2005-02-09 22:18:14.000000000 +0100 @@ -2,7 +2,12 @@ # GNU C version 4.0.0 20050208 (experimental) (i686-pc-linux-gnu) # compiled by GNU C version 4.0.0 20050203 (experimental). # GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 -# options passed: -mtune=pentiumpro -auxbase-strip -fverbose-asm +# options passed: -mtune=pentiumpro -auxbase-strip -O1 +# -fno-cprop-registers -fno-defer-pop -fno-guess-branch-probability +# -fno-if-conversion -fno-if-conversion2 -fno-loop-optimize +# -fno-merge-constants -fno-tree-ccp -fno-tree-ch -fno-tree-copyrename +# -fno-tree-dce -fno-tree-dominator-opts -fno-tree-dse -fno-tree-fre +# -fno-tree-lrs -fno-tree-sra -fno-tree-ter -fverbose-asm # options enabled: -falign-loops -fargument-alias -fbranch-count-reg # -fcommon -feliminate-unused-debug-types -ffunction-cse -fgcse-lm -fident # -fivopts -fkeep-static-consts -fleading-underscore -floop-optimize2 @@ -21,13 +26,8 @@ movl %esp, %ebp #, subl $8, %esp #, andl $-16, %esp #, - movl $0, %eax #, tmp60 - addl $15, %eax #, tmp61 - addl $15, %eax #, tmp62 - shrl $4, %eax #, tmp63 - sall $4, %eax #, tmp64 - subl %eax, %esp # tmp64, - movl $0, %eax #, D.1118 + subl $16, %esp #, + movl $0, %eax #, leave ret .size main, .-main -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19848