http://llvm.org/bugs/show_bug.cgi?id=15950
Bug ID: 15950
Summary: A bug in DAG Combiner when turns a shuffle with undef
mask of two CONCAT_VECTORS into a single concat
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 10488
--> http://llvm.org/bugs/attachment.cgi?id=10488&action=edit
bug.ll Overflow caused by undef mask
In DAG Combiner, an undef mask in ShuffleVector causes an overflow of an
unsigned variable. The overflowed variable will cause the assertion failure.
To reproduce the failure: llc bug.ll
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