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031a325c42
Summary: The naked function attribute is meant to suppress all function prologue/epilogue instructions. On ARM, some are still emitted if an argument greater than 64 bytes in size (the threshold for using the byval attribute in IR) is passed partially in registers. Perform the check for Attribute::Naked and early exit in SelectionDAGISel::LowerArguments(). Checking in ARMFrameLowering::determineCalleeSaves() is too late. A test case is included. Reviewers: llvm-commits, olista01, danielkiss Reviewed By: danielkiss Subscribers: kristof.beyls, hiraditya, danielkiss Tags: #llvm Differential Revision: https://reviews.llvm.org/D80715 Change-Id: Icedecf2a4ad31bc3c35ab0df7489a9d346e1f7cc
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