http://llvm.org/bugs/show_bug.cgi?id=5458
Summary: reassociate introduces undef for no apparent reason
Product: libraries
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Scalar Optimizations
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=3803)
--> (http://llvm.org/bugs/attachment.cgi?id=3803)
reduced .ll testcase
I have no idea what reassociate thinks it's doing. The attached reduced .ll
file shows an example where "opt -reassociate" adds a new 'mul undef, undef'
and an 'add undef, undef', then goes off and uses those in a way that
introduces undefinedness into the program.
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