https://llvm.org/bugs/show_bug.cgi?id=27832
Bug ID: 27832
Summary: Missing handling of endianness(host) !=
endianess(target) in
ExecutionEngine::LoadValueFromMemory
Product: libraries
Version: 3.8
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Generic Execution Engine Support
Assignee: unassignedb...@nondot.org
Reporter: l...@christian-eichler.de
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 16394
--> https://llvm.org/bugs/attachment.cgi?id=16394&action=edit
Example .ll (big endian targetlayout)
Method `ExecutionEngine::StoreValueToMemory` reverses the byte order in memory
if the endianness of host and target do not match.
Method `ExecutionEngine::LoadValueFromMemory` currently does not undo that
operation, leading to loading of incorrect values.
Running lli with the .ll file attached to this report shows different return
values for `lli -force-interpreter loadstore_endian.ll` and `lli
loadstore_endian.ll` when executed on a little endian system.
This statement holds (at least) for lli from LLVM 3.4 up to LLVM 3.8
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