So you see the issue as well in ARM? When doing a
objdump -D weakMainO1.exe | grep -A 10
"<_ZN1C13caller_methodEv>:"
I see:
00008b88 <_ZN1C13caller_methodEv>:
8b88: e92d4800 push {fp, lr}
8b8c: e1a0b00d mov fp, sp
8b90: e24dd008 sub sp, sp, #8
8b94: e58d0004 str r0, [sp, #4]
8b98: e59d0004 ldr r0, [sp, #4]
8b9c: ebffdd17 bl 0 <__preinit_array_end>
8ba0: e1a0d00b mov sp, fp
8ba4: e8bd4800 pop {fp, lr}
8ba8: e12fff1e bx lr
where the bl 0 causes a seg fault.
I'll check x86_64, but currently don't have that setup, so it'll
take me a little bit of time to check.
-----Original Message-----
From: Rafael Espíndola [mailto:rafael.espindola at gmail.com]
Sent: Friday, May 30, 2014 2:05 PM
To: Daniel Stewart
Cc: LLVM Developers Mailing List
Subject: Re: Error with Gold Linker during LTO
> clang++ -O1 -o weakMainO1.exe -flto -mcpu=cortex-a15 -mllvm
> -debug-only=inline -static weakMain.cpp weakImpl.o -v
> -Wl,-plugin-opt=-debug-only=inline -Wl,-fuse-ld=gold
> -Wl,-plugin-opt=also-emit-llvm -Wl,-plugin-opt=obj-path=. >& O1.log
Those command line options don't exist on trunk.
The following works for me:
$ clang++ -O0 weakImpl.cpp -o weakImpl.o -c
$ clang++ -O1 -o weakMainO1.exe -flto -static weakMain.cpp weakImpl.o
Do you also see the issue with x86_64?
Cheers,
Rafael
Sorry, I had understood that the linker was crashing, not the generated program. I can reproduce the issue now. On 30 May 2014 15:48, Daniel Stewart <stewartd at codeaurora.org> wrote:> So you see the issue as well in ARM? When doing a > > objdump -D weakMainO1.exe | grep -A 10 "<_ZN1C13caller_methodEv>:" > > I see: > > 00008b88 <_ZN1C13caller_methodEv>: > 8b88: e92d4800 push {fp, lr} > 8b8c: e1a0b00d mov fp, sp > 8b90: e24dd008 sub sp, sp, #8 > 8b94: e58d0004 str r0, [sp, #4] > 8b98: e59d0004 ldr r0, [sp, #4] > 8b9c: ebffdd17 bl 0 <__preinit_array_end> > 8ba0: e1a0d00b mov sp, fp > 8ba4: e8bd4800 pop {fp, lr} > 8ba8: e12fff1e bx lr > > where the bl 0 causes a seg fault. > > I'll check x86_64, but currently don't have that setup, so it'll take me a little bit of time to check. > > -----Original Message----- > From: Rafael Espíndola [mailto:rafael.espindola at gmail.com] > Sent: Friday, May 30, 2014 2:05 PM > To: Daniel Stewart > Cc: LLVM Developers Mailing List > Subject: Re: Error with Gold Linker during LTO > >> clang++ -O1 -o weakMainO1.exe -flto -mcpu=cortex-a15 -mllvm >> -debug-only=inline -static weakMain.cpp weakImpl.o -v >> -Wl,-plugin-opt=-debug-only=inline -Wl,-fuse-ld=gold >> -Wl,-plugin-opt=also-emit-llvm -Wl,-plugin-opt=obj-path=. >& O1.log > > Those command line options don't exist on trunk. > > The following works for me: > > $ clang++ -O0 weakImpl.cpp -o weakImpl.o -c > $ clang++ -O1 -o weakMainO1.exe -flto -static weakMain.cpp weakImpl.o > > Do you also see the issue with x86_64? > > Cheers, > Rafael >
Glad to hear you can reproduce it. What I don't know is if this is a linker issue or an LLVM issue. -----Original Message----- From: Rafael Espíndola [mailto:rafael.espindola at gmail.com] Sent: Friday, May 30, 2014 3:58 PM To: Daniel Stewart Cc: LLVM Developers Mailing List Subject: Re: Error with Gold Linker during LTO Sorry, I had understood that the linker was crashing, not the generated program. I can reproduce the issue now. On 30 May 2014 15:48, Daniel Stewart <stewartd at codeaurora.org> wrote:> So you see the issue as well in ARM? When doing a > > objdump -D weakMainO1.exe | grep -A 10 "<_ZN1C13caller_methodEv>:" > > I see: > > 00008b88 <_ZN1C13caller_methodEv>: > 8b88: e92d4800 push {fp, lr} > 8b8c: e1a0b00d mov fp, sp > 8b90: e24dd008 sub sp, sp, #8 > 8b94: e58d0004 str r0, [sp, #4] > 8b98: e59d0004 ldr r0, [sp, #4] > 8b9c: ebffdd17 bl 0 <__preinit_array_end> > 8ba0: e1a0d00b mov sp, fp > 8ba4: e8bd4800 pop {fp, lr} > 8ba8: e12fff1e bx lr > > where the bl 0 causes a seg fault. > > I'll check x86_64, but currently don't have that setup, so it'll take me a little bit of time to check. > > -----Original Message----- > From: Rafael Espíndola [mailto:rafael.espindola at gmail.com] > Sent: Friday, May 30, 2014 2:05 PM > To: Daniel Stewart > Cc: LLVM Developers Mailing List > Subject: Re: Error with Gold Linker during LTO > >> clang++ -O1 -o weakMainO1.exe -flto -mcpu=cortex-a15 -mllvm >> -debug-only=inline -static weakMain.cpp weakImpl.o -v >> -Wl,-plugin-opt=-debug-only=inline -Wl,-fuse-ld=gold >> -Wl,-plugin-opt=also-emit-llvm -Wl,-plugin-opt=obj-path=. >& O1.log > > Those command line options don't exist on trunk. > > The following works for me: > > $ clang++ -O0 weakImpl.cpp -o weakImpl.o -c > $ clang++ -O1 -o weakMainO1.exe -flto -static weakMain.cpp weakImpl.o > > Do you also see the issue with x86_64? > > Cheers, > Rafael >
Hi Rafael, Just pointing out, that this test fails with x86_64 with trunk. http://llvm.org/bugs/show_bug.cgi?id=19888 Thanks Shankar Easwaran On 5/30/2014 2:57 PM, Rafael Espíndola wrote:> Sorry, I had understood that the linker was crashing, not the generated program. > > I can reproduce the issue now. > > On 30 May 2014 15:48, Daniel Stewart <stewartd at codeaurora.org> wrote: >> So you see the issue as well in ARM? When doing a >> >> objdump -D weakMainO1.exe | grep -A 10 "<_ZN1C13caller_methodEv>:" >> >> I see: >> >> 00008b88 <_ZN1C13caller_methodEv>: >> 8b88: e92d4800 push {fp, lr} >> 8b8c: e1a0b00d mov fp, sp >> 8b90: e24dd008 sub sp, sp, #8 >> 8b94: e58d0004 str r0, [sp, #4] >> 8b98: e59d0004 ldr r0, [sp, #4] >> 8b9c: ebffdd17 bl 0 <__preinit_array_end> >> 8ba0: e1a0d00b mov sp, fp >> 8ba4: e8bd4800 pop {fp, lr} >> 8ba8: e12fff1e bx lr >> >> where the bl 0 causes a seg fault. >> >> I'll check x86_64, but currently don't have that setup, so it'll take me a little bit of time to check. >> >> -----Original Message----- >> From: Rafael Espíndola [mailto:rafael.espindola at gmail.com] >> Sent: Friday, May 30, 2014 2:05 PM >> To: Daniel Stewart >> Cc: LLVM Developers Mailing List >> Subject: Re: Error with Gold Linker during LTO >> >>> clang++ -O1 -o weakMainO1.exe -flto -mcpu=cortex-a15 -mllvm >>> -debug-only=inline -static weakMain.cpp weakImpl.o -v >>> -Wl,-plugin-opt=-debug-only=inline -Wl,-fuse-ld=gold >>> -Wl,-plugin-opt=also-emit-llvm -Wl,-plugin-opt=obj-path=. >& O1.log >> Those command line options don't exist on trunk. >> >> The following works for me: >> >> $ clang++ -O0 weakImpl.cpp -o weakImpl.o -c >> $ clang++ -O1 -o weakMainO1.exe -flto -static weakMain.cpp weakImpl.o >> >> Do you also see the issue with x86_64? >> >> Cheers, >> Rafael >> > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev-- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140530/d4a1632d/attachment.html>