http://llvm.org/bugs/show_bug.cgi?id=4154
Summary: -fast and -tailcallopt don't combine
Product: libraries
Version: 2.5
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Backend: X86
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=2951)
--> (http://llvm.org/bugs/attachment.cgi?id=2951)
wrong result of "llc -fast -tailcallopt"
"llc -fast -tailcallopt" gives wrong results on the small attached file.
The issue is that there is a "addl 4, %esp" after the "call *%eax", which is
(correctly) not there if compiled with "llc -tailcallopt".
This seems to be tailcallopt not generating the correct calls in "fast" mode.
It was discovered by playing with the JIT compiler. (Obviously, the call in
question is not meant to be a tail call; this is part of a more complete set of
functions, and some other calls elsewhere are the ones meant to be tail calls.)
--
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
