[clang] [clang][bytecode] Support different integral types (e.g. addresses) (PR #185028)

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github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

* 53091 tests passed
* 1011 tests skipped
* 2 tests failed

## Failed Tests
(click on a test name to see its output)

### Clang
<details>
<summary>Clang.AST/ByteCode/builtin-bit-cast.cpp</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
c:\_work\llvm-project\llvm-project\build\bin\clang.exe -cc1 -internal-isystem C:\_work\llvm-project\llvm-project\build\lib\clang\23\include -nostdsysteminc -verify=ref,both -std=c++2a -fsyntax-only C:\_work\llvm-project\llvm-project\clang\test\AST\ByteCode\builtin-bit-cast.cpp
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\clang.exe' -cc1 -internal-isystem 'C:\_work\llvm-project\llvm-project\build\lib\clang\23\include' -nostdsysteminc -verify=ref,both -std=c++2a -fsyntax-only 'C:\_work\llvm-project\llvm-project\clang\test\AST\ByteCode\builtin-bit-cast.cpp'
# .---command stderr------------
# | error: diagnostics with 'error' severity expected but not seen: 
# |   File C:\_work\llvm-project\llvm-project\clang\test\AST\ByteCode\builtin-bit-cast.cpp Line 599 'both-error': not an integral constant expression
# | error: diagnostics with 'error' severity seen but not expected: 
# |   Line 597: cast from pointer to smaller type 'long' loses information
# |   Line 597: cast from pointer to smaller type 'long' loses information
# |   Line 597: cast from pointer to smaller type 'long' loses information
# |   File C:\_work\llvm-project\llvm-project\clang\test\AST\ByteCode\builtin-bit-cast.cpp Line 596: no return statement in constexpr function
# | 5 errors generated.
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>
<details>
<summary>Clang.CodeGen/const-init.c</summary>

```
Exit Code: 2

Command Output (stdout):
--
# RUN: at line 3
c:\_work\llvm-project\llvm-project\build\bin\clang.exe -cc1 -internal-isystem C:\_work\llvm-project\llvm-project\build\lib\clang\23\include -nostdsysteminc -triple i386-pc-linux-gnu -ffreestanding -Wno-pointer-to-int-cast -Wno-int-conversion -ffp-exception-behavior=strict -emit-llvm -o - C:\_work\llvm-project\llvm-project\clang\test\CodeGen\const-init.c -fexperimental-new-constant-interpreter | c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\clang\test\CodeGen\const-init.c
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\clang.exe' -cc1 -internal-isystem 'C:\_work\llvm-project\llvm-project\build\lib\clang\23\include' -nostdsysteminc -triple i386-pc-linux-gnu -ffreestanding -Wno-pointer-to-int-cast -Wno-int-conversion -ffp-exception-behavior=strict -emit-llvm -o - 'C:\_work\llvm-project\llvm-project\clang\test\CodeGen\const-init.c' -fexperimental-new-constant-interpreter
# .---command stderr------------
# | C:\_work\llvm-project\llvm-project\clang\test\CodeGen\const-init.c:94:11: error: initializer element is not a compile-time constant
# |    94 | int g15 = (int) (char) ((void*) 0 + 255);
# |       |           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 1 error generated.
# `-----------------------------
# error: command failed with exit status: 1
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe' 'C:\_work\llvm-project\llvm-project\clang\test\CodeGen\const-init.c'
# .---command stderr------------
# | FileCheck error: '<stdin>' is empty.
# | FileCheck command line:  c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\clang\test\CodeGen\const-init.c
# `-----------------------------
# error: command failed with exit status: 2

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/185028