[Bug target/66782] Unable to run 64-bit wine after MS->SYSV register changes

[marcus at jet dot franken.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66782

--- Comment #3 from marcus at jet dot franken.de ---
Created attachment 35927
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35927&action=edit
testcase-min.i

gcc -S -fPIC -O2 -g testcase.i -o testcase.s

there will be a pattern to spot the miscompilation:

        call    strlen@PLT
.LVL27:
        movq    40(%rsp), %rcx
        movq    %rsi, %rdx

However %rsi is clobbered by strlen and should not have been used here.