http://llvm.org/bugs/show_bug.cgi?id=9976
Summary: Crash in LiveVariables::runOnMachineFunction in
Release builds
Product: new-bugs
Version: trunk
Platform: PC
OS/Version: Windows 2000
Status: NEW
Severity: normal
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=6625)
--> (http://llvm.org/bugs/attachment.cgi?id=6625)
Patch with test case and fix
I see a crash in LiveVariables::runOnMachineFunction where it transfers the
dead/kill information to machine instructions. The loop accesses memory past
the end of an array.
This crash occurs only on Windows and only with Release/RelWithDebInfo builds.
It does not occur in Debug builds, nor on Mac OS X or Linux.
I have attached a fix (w/ test case). I modified the loop to work like other
similar iterations in the LiveVariables class, and to use the "getVarInfo()"
method, which will grow the array in question as necessary, preventing the
out-of-bounds access.
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