http://llvm.org/bugs/show_bug.cgi?id=10072
Summary: Necessary 'indirectbr' instruction is optimized away
Product: libraries
Version: trunk
Platform: PC
OS/Version: FreeBSD
Status: NEW
Severity: release blocker
Priority: P
Component: Loop Optimizer
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=6686)
--> (http://llvm.org/bugs/attachment.cgi?id=6686)
testcase
Please run the attached testcase (shar shell archive) with the current trunk
version of llvm.
It will create the original module mod.ll. It will also optimize it into
mod-o.ll.
indirectbr instruction in question is missing from mod-o.ll.
This instruction is necessary because it depends on the return value of
undefined function xselectorx().
As a result mod-o.ll is wrong (not equivalent to mod.ll).
I observe the problem with the today's revision 132525 and with the older
revision 128446. I know this didn't happen with the code from few months ago.
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