0edc97f119
This defines a new kind of IR Constant that represents a ptrauth signed pointer, as used in AArch64 PAuth. It allows representing most kinds of signed pointer constants used thus far in the llvm ptrauth implementations, notably those used in the Darwin and ELF ABIs being implemented for c/c++. These signed pointer constants are then lowered to ELF/MachO relocations. These can be simply thought of as a constant `llvm.ptrauth.sign`, with the interesting addition of discriminator computation: the `ptrauth` constant can also represent a combined blend, when both address and integer discriminator operands are used. Both operands are otherwise optional, with default values 0/null.
7 lines
233 B
LLVM
7 lines
233 B
LLVM
; RUN: not llvm-as < %s 2>&1 | FileCheck %s
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@var = global i32 0
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; CHECK: error: constant ptrauth integer discriminator must be i64 constant
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@auth_var = global ptr ptrauth (ptr @var, i32 2, ptr null, i64 ptrtoint (ptr @var to i64))
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