llvm-project.git/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp, branch users/nico/python-2

[SHT_LLVM_BB_ADDR_MAP] Remove support for versions 1 and 0 (SHT_LLVM_BB_ADDR_MAP_V0). (#146186)

2025-07-02T17:31:52+00:00

Version 2 was added more than two years ago
(https://github.com/llvm/llvm-project/commit/6015a045d768feab3bae9ad9c0c81e118df8b04a).
So it should be safe to deprecate older versions.

[AsmPrinter] Always emit global equivalents if there is non-global uses (#145648)

2025-06-25T10:39:36+00:00

A case found from https://github.com/rust-lang/rust/issues/142752:
https://llvm.godbolt.org/z/T7ce9saWh.

We should emit `@bar_0` for the following code:

```llvm
target triple = "x86_64-unknown-linux-gnu"

@rel_0 = private unnamed_addr constant [1 x i32] [
  i32 trunc (i64 sub (i64 ptrtoint (ptr @bar_0 to i64), i64 ptrtoint (ptr @rel_0 to i64)) to i32)]
@bar_0 = internal unnamed_addr constant ptr @foo_0, align 8
@foo_0 = external global ptr, align 8

define void @foo(ptr %arg0) {
  store ptr @bar_0, ptr %arg0, align 8
  ret void
}
```

MC,AsmPrinter: Report redefinition error instead of crashing in more cases

2025-06-24T06:00:03+00:00

* Fix the crash for `.equiv b, undef; b:` (.equiv equates a symbol to an expression and reports an error if the symbol was already defined).
* Remove redundant isVariable check from emitFunctionEntryLabel

Pull Request: https://github.com/llvm/llvm-project/pull/145460

[SHT_LLVM_BB_ADDR_MAP] Encode and decode callsite offsets in a newly-introduced SHT_LLVM_BB_ADDR_MAP version. (#144426)

2025-06-23T16:25:14+00:00

Recently, we have been looking at some optimizations targeting
individual calls. In particular, we plan to extend the address mapping
technique to map to individual callsites. For example, in this piece of
code for a basic blocks:

```
:
1200:    lea 0x1(%rcx), %rdx
1204:    callq foo
1209:    cmpq 0x10, %rdx
120d:    ja  L1
```

We want to emit 0x9 as the call site offset for `callq foo` (the offset
from the block entry to right after the call), so that we know if a
sampled address is before the call or after.

This PR implements the decode/encode/emit capability. The Codegen change
will be implemented in a later PR.

AsmPrinter: Do not use report_fatal_error for unhandled ConstantExpr (#145275)

2025-06-23T07:29:58+00:00

AsmPrinter: Do not use report_fatal_error for unknown appending linkage (#145269)

2025-06-23T07:26:27+00:00

AsmPrinter: Do not use report_fatal_error for AIX XXStructor error (#145273)

2025-06-23T07:25:53+00:00

[AsmPrinter] Fix crash when remarks section is unsupported (#144724)

2025-06-20T11:55:11+00:00

Emit a warning and bail out instead of segfault-ing when the current
object file format does not have support for emitting a remarks section.

[CodeGen][COFF] Always emit CodeView compiler info on Windows targets (#142970)

2025-06-13T20:48:29+00:00

MSVC always emits minimal CodeView metadata with compiler information,
even when debug info is otherwise disabled. Other tools may rely on this
metadata being present. For example, linkers use it to determine whether
hotpatching is enabled for the object file.

Remove GlobalObject::getAlign/setAlignment (#143188)

2025-06-09T20:51:03+00:00

Currently, GlobalObject has an "alignment" property... but it's
basically nonsense: alignment doesn't mean the same thing for variables
and functions, and it's completely meaningless for ifuncs.

This "removes" (actually marking protected) the methods from
GlobalObject, adds the relevant methods to Function and GlobalVariable,
and adjusts the code appropriately.

This should make future alignment-related cleanups easier.