Re: ARM gcc 4.1 optimization bug.
Dave Korn wrote: On 06 June 2006 15:17, Richard Earnshaw wrote: On Tue, 2006-06-06 at 15:05, Dirk Behme wrote: Fengwei Yin wrote: Hi Daniel, I have already reported this bug. The bug number is #27363. I also tried the gcc snapshot 4.1.1-20060421. The bug is not fixed in this version too. On 5/1/06, Daniel Jacobowitz [EMAIL PROTECTED] wrote: On Sun, Apr 30, 2006 at 11:03:05AM +0800, Fengwei Yin wrote: I am using gcc4.1 for ARM to build Linux kernel. But there is a bug related to the gcc optimization. I assume this is correct mail list to report this bug. If not, please let me know. No, if you have a bug report, please use the bug reporting system. Please see: http://gcc.gnu.org/bugs.html Any news regarding this? Seems that I have the same problem. However, I first selected an other list http://sourceware.org/ml/crossgcc/2006-06/msg00032.html before finding this ;) Looking at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27363 it looks to me that this isn't fixed at 4.1.1? The bug is in state 'WAITING', which means there is not enough information for us to investigate the problem. See http://gcc.gnu.org/bugs.html for details of what we need. Just to elaborate: we need a simple self-contained testcase that anybody can compile themselves and see the bug. There's no possible way to analyze and fix it without being able to recreate it! In the bug report, you wrote I tried to make a simple test example for this bug. But If I put the code from ALSA subsystem of Linux kernel to a test.c file, the gcc will product correct assembly code. So, what you need to do is re-do the original kernel build, but add --save-temps to the compiler flags, then find the .i file with the preprocessed source code for the failing module. This will be entirely selfcontained and will reproduce the bug, because that's what the compiler actually gets fed with in the case where you do see the bug; when you extracted it to a separate file there was probably some subtle difference related maybe to macro #defines or something that didn't match up. We now put the code generated with --save-temps and the resulting assembly files for different optimization levels as attachment to http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27363 Anything else needed? Best regards Dirk
Re: ARM gcc 4.1 optimization bug.
Fengwei Yin wrote: Hi Daniel, I have already reported this bug. The bug number is #27363. I also tried the gcc snapshot 4.1.1-20060421. The bug is not fixed in this version too. On 5/1/06, Daniel Jacobowitz [EMAIL PROTECTED] wrote: On Sun, Apr 30, 2006 at 11:03:05AM +0800, Fengwei Yin wrote: I am using gcc4.1 for ARM to build Linux kernel. But there is a bug related to the gcc optimization. I assume this is correct mail list to report this bug. If not, please let me know. No, if you have a bug report, please use the bug reporting system. Please see: http://gcc.gnu.org/bugs.html Any news regarding this? Seems that I have the same problem. However, I first selected an other list http://sourceware.org/ml/crossgcc/2006-06/msg00032.html before finding this ;) Looking at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27363 it looks to me that this isn't fixed at 4.1.1? To create easier testcase, maybe it helps to compile only kernel's sound modules? I can reproduce this failure compiling sound modules of 2.6.17-rc5 with using different optimization levels for them: -Os - failure -O2 - failure -O0 - building of some modules fails -O1 - sound works! Best regards Dirk
Re: ARM gcc 4.1 optimization bug.
On Tue, 2006-06-06 at 15:05, Dirk Behme wrote: Fengwei Yin wrote: Hi Daniel, I have already reported this bug. The bug number is #27363. I also tried the gcc snapshot 4.1.1-20060421. The bug is not fixed in this version too. On 5/1/06, Daniel Jacobowitz [EMAIL PROTECTED] wrote: On Sun, Apr 30, 2006 at 11:03:05AM +0800, Fengwei Yin wrote: I am using gcc4.1 for ARM to build Linux kernel. But there is a bug related to the gcc optimization. I assume this is correct mail list to report this bug. If not, please let me know. No, if you have a bug report, please use the bug reporting system. Please see: http://gcc.gnu.org/bugs.html Any news regarding this? Seems that I have the same problem. However, I first selected an other list http://sourceware.org/ml/crossgcc/2006-06/msg00032.html before finding this ;) Looking at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27363 it looks to me that this isn't fixed at 4.1.1? The bug is in state 'WAITING', which means there is not enough information for us to investigate the problem. See http://gcc.gnu.org/bugs.html for details of what we need. R.
Re: ARM gcc 4.1 optimization bug.
Hi Daniel, I have already reported this bug. The bug number is #27363. I also tried the gcc snapshot 4.1.1-20060421. The bug is not fixed in this version too. Thanks Regards yfw On 5/1/06, Daniel Jacobowitz [EMAIL PROTECTED] wrote: On Sun, Apr 30, 2006 at 11:03:05AM +0800, Fengwei Yin wrote: Hi, I am using gcc4.1 for ARM to build Linux kernel. But there is a bug related to the gcc optimization. I assume this is correct mail list to report this bug. If not, please let me know. No, if you have a bug report, please use the bug reporting system. Please see: http://gcc.gnu.org/bugs.html -- Daniel Jacobowitz CodeSourcery
Re: ARM gcc 4.1 optimization bug.
On Sun, Apr 30, 2006 at 11:03:05AM +0800, Fengwei Yin wrote: Hi, I am using gcc4.1 for ARM to build Linux kernel. But there is a bug related to the gcc optimization. I assume this is correct mail list to report this bug. If not, please let me know. No, if you have a bug report, please use the bug reporting system. Please see: http://gcc.gnu.org/bugs.html -- Daniel Jacobowitz CodeSourcery
