https://llvm.org/bugs/show_bug.cgi?id=25839
Bug ID: 25839
Summary: __tls_get_addr gets called before saving return
address
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: PowerPC
Assignee: unassignedb...@nondot.org
Reporter: timshe...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 15457
--> https://llvm.org/bugs/attachment.cgi?id=15457&action=edit
Minimized test case
For a PIC TLS variable access in a function, prologue (mflr followed by std and
stdu) gets scheduled after a __tls_get_addr call. __tls_get_addr messed up LR
and no one saves/restores it.
Should the fix be simply adding PPC::ADJCALLSTACKDOWN and PPC::ADJCALLSTACKUP
around __tls_get_addr? What should the stack size be (say, 0)?
Attached minimized test case that fails on trunk.
Thanks!
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