[LLVMbugs] [Bug 13489] New: SolveQuadraticEquation asserts on certain infinite loops
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Tue Jul 31 05:25:39 PDT 2012
http://llvm.org/bugs/show_bug.cgi?id=13489
Bug #: 13489
Summary: SolveQuadraticEquation asserts on certain infinite
loops
Product: libraries
Version: trunk
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: Loop Optimizer
AssignedTo: unassignedbugs at nondot.org
ReportedBy: vslugovsky at gmail.com
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
Created attachment 8967
--> http://llvm.org/bugs/attachment.cgi?id=8967
Test case
There is no check for a negative value of 'B^2-4AC' in SolveQuadraticEquation
in ScalarEvolution.cpp
Some infinite loops can cause an assertion. See an attached test case.
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