http://llvm.org/bugs/show_bug.cgi?id=4174
Summary: LoopIndexSplit executes loop body too many times!
Product: libraries
Version: trunk
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: major
Priority: P2
Component: Loop Optimizer
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=2970)
--> (http://llvm.org/bugs/attachment.cgi?id=2970)
test case
With the attached test case, I get:
$ llvm-as -o - s.ll | lli
0
1
2
3
but:
$ llvm-as -o - s.ll | opt -f -loop-index-split | lli
0
1
2
2
3
4
LoopIndexSplit has completely broken how many times the loop iterates! This
test case is reduced from a loop that was mysteriously misbehaving deep inside
a C++ application.
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