[llvm-dev] llc tool followed by g++ : Abnormal behavior while compiling assembly to object file
Mahesh Attarde via llvm-dev
llvm-dev at lists.llvm.org
Mon Apr 23 02:51:01 PDT 2018
Hi
I am executing following steps to convert assembly to object code.
llc -march=x86-64 -filetype=asm input.ll -o input.s
g++ -g -c -o input.s --input.o
inshort
ll --> llc --> .s -->g++ -->obj
original source was something like this
{
printf(" **** %s ****",str);
}
input.s turn out to be
movq .str at GOTPCREL(%rip),%rdi
movq .str.1 at GOTPCREL(%rip),%rsi
xorl %eax,%eax
movq %rdi,%r14
callq printf at PLT
While at Runtime
mov 0x0(%rip),%rdi
mov 0x0(%rip),%rsi
xor %eax,%eax
mov %rdi,%r14
callq printf at PLT
Not really sure what happened here?
I was expecting at runtime offset for str and str.1 to be different.
I could really use some help to determine if this is bug?
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