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[lldb/DWARF] Add support for DW_OP_implicit_value #2021

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medismailben
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This patch completes https://reviews.llvm.org/D83560. Now that the
compiler can emit DW_OP_implicit_value into DWARF expressions, lldb
needed to learn reading these opcodes for variable inspection and
expression evaluation.

This implicit location descriptor specifies an immediate value with two
operands: the length (ULEB128) followed by a block representing the value
in the target memory representation.

rdar://67406091

Differential revision: https://reviews.llvm.org/D89842

Signed-off-by: Med Ismail Bennani [email protected]

This patch completes https://reviews.llvm.org/D83560. Now that the
compiler can emit `DW_OP_implicit_value` into DWARF expressions, lldb
needed to learn reading these opcodes for variable inspection and
expression evaluation.

This implicit location descriptor specifies an immediate value with two
operands: the length (ULEB128) followed by a block representing the value
in the target memory representation.

rdar://67406091

Differential revision: https://reviews.llvm.org/D89842

Signed-off-by: Med Ismail Bennani <[email protected]>
@medismailben
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@swift-ci test

@medismailben medismailben merged commit cd56dfb into swiftlang:apple/stable/20200714 Oct 22, 2020
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