[LLVMdev] Error with Gold Linker during LTO

[Daniel Stewart]

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