Files
clang-p2996/llvm/test/CodeGen/AArch64
Kristina Bessonova 4e958b4d7c [llvm-objdump] Avoid using mapping symbols as branch target labels
The main motivation for this change is to avoid ambiguity because
mapping symbol names may not be unique across a binary and do not allow uniquely
identifying target address. So that mapping symbols used as branch target
labels make llvm-objdump output less readable.

Another point is that mapping symbols sometimes appear in
non-allocatable sections, like debug info sections which make objdump
output even more confusing.

For example, a small AArch64 executable may contain plenty of `$d[.*]`
symbols and none of them would be useful as a label for resolving
a branch or a memory operand target address:

```
  0000000000000254 l       .note.ABI-tag	0000000000000000 $d
  00000000000008d4 l       .eh_frame            0000000000000000 $d
  0000000000000868 l       .rodata              0000000000000000 $d
  0000000000011028 l       .data                0000000000000000 $d
  0000000000010db8 l       .fini_array          0000000000000000 $d
  0000000000010db0 l       .init_array          0000000000000000 $d
  00000000000008e8 l       .eh_frame            0000000000000000 $d
  0000000000011034 l       .bss                 0000000000000000 $d
```

Note that GNU objdump doesn't use mapping symbols as branch target
labels for all targets that support such symbols (ARM, AArch64, CSKY).

Differential Revision: https://reviews.llvm.org/D139131
2022-12-06 12:19:12 +02:00
..
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++ SVE CodeGen Warnings ++

When the WARN check lines fail in the SVE codegen tests it most likely means you
have introduced a warning due to:
1. Adding an invalid call to VectorType::getNumElements() or EVT::getVectorNumElements()
   when the type is a scalable vector.
2. Relying upon an implicit cast conversion from TypeSize to uint64_t.

For generic code, please modify your code to work with ElementCount and TypeSize directly.
For target-specific code that only deals with fixed-width vectors, use the fixed-size interfaces.
Please refer to the code where those functions live for more details.