http://llvm.org/bugs/show_bug.cgi?id=3846
Summary: PrologEpilogInserter::replaceFrameIndices reads past
last instruction in basic block
Product: libraries
Version: 2.5
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Common Code Generator Code
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
This bug is similar to bug 3842.
In certain cases, the replaceFrameIndices walks off the end of the instruction
iterator at line 573 of
http://llvm.org/viewvc/llvm-project/llvm/tags/RELEASE_25/lib/CodeGen/PrologEpilogInserter.cpp?annotate=65926,
due to an unchecked ++I.
The solution is to check that I is not the end of the block before
incrementing. I.e. replace line 573 with:
if (DoIncr && BB->end != I) ++I;
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