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[Debuginfo][DW_OP_implicit_pointer] (1/7) Support for…

Authored by alok on Jan 15 2021, 12:10 AM.

Description

[Debuginfo][DW_OP_implicit_pointer] (1/7) Support for DW_OP_LLVM_implicit_pointer

New dwarf operator DW_OP_LLVM_implicit_pointer is introduced (present only in LLVM IR)
This operator is required as it is different than DWARF operator
DW_OP_implicit_pointer in representation and specification (number
and types of operands) and later can not be used as multiple level.

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D84113