Jeremy Morse a975472fa6 [DebugInfo][InstrRef] Describe value sizes when spilt to stack ... This is a re-apply of D123599, which was reverted in 4fe2ab5279, now with a more appropriate assertion. Original commit message follow: InstrRefBasedLDV can track and describe variable values that are spilt to the stack -- however it does not current describe the size of the value on the stack. This can cause uninitialized bytes to be read from the stack if a small register is spilt for a larger variable, or theoretically on big-endian machines if a large value on the stack is used for a small variable. Fix this by using DW_OP_deref_size to specify the amount of data to load from the stack, if there's any possibility for ambiguity. There are a few scenarios where this can be omitted (such as when using DW_OP_piece and a non-DW_OP_stack_value location), see deref-spills-with-size.mir for an explicit table of inputs flavours and output expressions. Differential Revision: https://reviews.llvm.org/D123599		2022-05-12 15:52:55 +01:00
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InstrRefBasedImpl.cpp	[DebugInfo][InstrRef] Describe value sizes when spilt to stack	2022-05-12 15:52:55 +01:00
InstrRefBasedImpl.h	[DebugInfo][InstrRef] Describe value sizes when spilt to stack	2022-05-12 15:52:55 +01:00
LiveDebugValues.cpp	Cleanup codegen includes	2022-03-16 08:43:00 +01:00
LiveDebugValues.h	Cleanup codegen includes	2022-03-16 08:43:00 +01:00
VarLocBasedImpl.cpp	[CodeGen] Apply clang-tidy fixes for readability-redundant-smartptr-get (NFC)	2022-03-20 23:11:06 -07:00