## Summary <!-- Summarize the bug encountered concisely --> ## System Information Linux/x86-64, Main branch as of ccc843f98319c4dc ## Steps to reproduce ``` cd compiler make cycle mv ppcx64 $HOME/bin/ppcx1 make FPC=$HOME/bin/ppcx1 LLVM=1 OPT="-O- -gw" clean all mv ppcx64 $HOME/bin/ppcx1llvm cd ../rtl/linux make FPC=$HOME/bin/ppcx1llvm ``` ## What is the current bug behavior? ``` $ run Starting program: /home/jmaebe/bin/ppcx2llgv -Fi../inc -Fi../x86_64 -Fi../unix -Fix86_64 -FE. -FU../../rtl/units/x86_64-linux -Cg -Fl/usr/lib/gcc/x86_64-linux-gnu/7 -dx86_64 -Us -Sg system.pp Program received signal SIGSEGV, Segmentation fault. 0x00000000004c7f62 in GETCOPY (this=0x134d7e8) at aasmtai.pas:3135 $ x/i $pc-20 3135 p.oper[i]^:=oper[i]^; 0x4c7f4e <GETCOPY+110>: mov -0x14(%rbp),%edx 0x4c7f51 <GETCOPY+113>: mov 0x40(%rax,%rdx,8),%rax 0x4c7f56 <GETCOPY+118>: mov -0x8(%rbp),%rdx 0x4c7f5a <GETCOPY+122>: mov -0x14(%rbp),%ecx 0x4c7f5d <GETCOPY+125>: mov 0x40(%rdx,%rcx,8),%rdx => 0x4c7f62 <GETCOPY+130>: movdqa (%rdx),%xmm0 0x4c7f66 <GETCOPY+134>: movdqa 0x10(%rdx),%xmm1 0x4c7f6b <GETCOPY+139>: movdqa %xmm0,(%rax) 0x4c7f6f <GETCOPY+143>: movdqa %xmm1,0x10(%rax) 0x4c7f74 <GETCOPY+148>: mov -0x8(%rbp),%rdx $ p/x $rdx $2 = 0x1498a38 ``` ## What is the expected (correct) behavior? ConcatCopy should not use movdqa here, but movdqu. I don't know why it thinks that reference will be 16 bytes aligned. ## Other remarks Unrelated to this issue: `GetRefAlignment` should use `current_procinfo.framepointer` instead of `NR_RBP`. `RBP` could be used as a register variable in functions that use the stack pointer as frame pointer.