Summary: | using "-fprofile-use" on code that has HUGE amounts of inline asm borks it | ||
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Product: | gcc | Reporter: | Tom St Denis <tomstdenis> |
Component: | rtl-optimization | Assignee: | Not yet assigned to anyone <unassigned> |
Status: | RESOLVED INVALID | ||
Severity: | normal | CC: | gcc-bugs |
Priority: | P2 | Keywords: | ice-on-valid-code |
Version: | 3.4.4 | ||
Target Milestone: | --- | ||
Host: | Target: | i686-pc-linux-gnu | |
Build: | Known to work: | ||
Known to fail: | Last reconfirmed: | ||
Attachments: |
It's the preprocessed code that died.
Profile data for the file that dies |
Description
Tom St Denis
2005-06-17 14:30:21 UTC
Created attachment 9104 [details]
It's the preprocessed code that died.
Can you show how you compiled both with -fprofile-generate and -fprofile-use? (In reply to comment #2) > Can you show how you compiled both with -fprofile-generate and -fprofile-use? cc -march=prescott -fprofile-generate -Wall -W -Wshadow -I./ -O3 -funroll-loops -fomit-frame-pointer -c -o fp_set.o fp_set.c Typical compile statement [just the .c and .o file names change]. I ran my demo, then did rm -f *.[ao] Then did the build again switching "-generate" to "-use". Tom (In reply to comment #3) One more question, what is the ICE? (In reply to comment #4) > (In reply to comment #3) > One more question, what is the ICE? What is ICE and how do I figure that out? Tom What is the error comming from GCC with -fprofile-use? (In reply to comment #6) > What is the error comming from GCC with -fprofile-use? cc -march=prescott -fprofile-use -Wall -W -Wshadow -I./ -O3 -funroll-loops -fomit-frame-pointer -c -o fp_sqr_comba.o fp_sqr_comba.c fp_sqr_comba.c: In function `fp_sqr_comba_small': fp_sqr_comba.c:364: warning: 'sc0' might be used uninitialized in this function fp_sqr_comba.c:364: warning: 'sc1' might be used uninitialized in this function fp_sqr_comba.c:364: warning: 'sc2' might be used uninitialized in this function fp_sqr_comba.c:1872: internal compiler error: in verify_local_live_at_start, at flow.c:546 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://bugs.gentoo.org/> for instructions. Preprocessed source stored into /tmp/cc626adC.out file, please attach this to your bugreport. make: *** [fp_sqr_comba.o] Error 1 (In reply to comment #7) > See <URL:http://bugs.gentoo.org/> for instructions. Is there a reason why you reported this to here and not to gentoo or did gentoo tell you to file it here? Also since this is only reproducible with -fprofile-use, can you attach the full program since we cannot reproduce without running it? Created attachment 9105 [details]
Profile data for the file that dies
(In reply to comment #8) > (In reply to comment #7) > > See <URL:http://bugs.gentoo.org/> for instructions. > > Is there a reason why you reported this to here and not to gentoo or did gentoo tell you to file it here? > Also since this is only reproducible with -fprofile-use, can you attach the full program since we cannot > reproduce without running it? I've sent the profile data and I've uploaded the code to http://libtomcrypt.org/tfm.tar.bz2 Build with: CFLAGS="-march=prescott -fprofile-generate" make && gcc -march=prescott -fprofile-generate -O3 -fomit-frame-pointer -funroll-loops ecc.c libtfm.a -o ecc Then run "./ecc" Then run "rf -f [.][ao]" Rebuild with: CFLAGS="-march=prescott -fprofile-use" make && gcc -march=prescott -fprofile-use -O3 -fomit-frame-pointer -funroll-loops ecc.c libtfm.a -o ecc I'm inclined to say "don't do this" but i can see why this is a problem for the reporter. I can't reproduce the issue myself, though. Tom, do you still see a problem here? Sorry for the long delay btw. Can you attach the source which is needed to run this program? All I get trying to reproduce this bug in a new GCC is: [pinskia@celery ~/Desktop]$ ~/gcc-local/bin/gcc t.c -O2 -fomit-frame-pointer /usr/lib/crt1.o: In function `_start': (.text+0x18): undefined reference to `main' collect2: ld returned 1 exit status No feedback in 3 months for the full source so it is hard to figure out what is going wrong here so closing. |