[llvm] [IR] Add initial support for the byte type (PR #178666)

Sun Mar 15 16:23:32 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-darwin` running on `doug-worker-3` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/23/builds/18580

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: CodeGen/X86/byte-constants.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/llc < /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/CodeGen/X86/byte-constants.ll | /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/CodeGen/X86/byte-constants.ll
# executed command: /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/llc
# note: command had no output on stdout or stderr
# executed command: /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/CodeGen/X86/byte-constants.ll
# .---command stderr------------
# | [1m/Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/CodeGen/X86/byte-constants.ll:3:10: [0m[0;1;31merror: [0m[1mCHECK: expected string not found in input
[0m# | [1m[0m; CHECK: .globl x
# | [0;1;32m         ^
[0m# | [0;1;32m[0m[1m<stdin>:1:1: [0m[0;1;30mnote: [0m[1mscanning from here
[0m# | [1m[0m .build_version macos, 14, 0
# | [0;1;32m^
[0m# | [0;1;32m[0m[1m<stdin>:5:2: [0m[0;1;30mnote: [0m[1mpossible intended match here
[0m# | [1m[0m .globl _x ## @x
# | [0;1;32m ^
[0m# | [0;1;32m[0m
# | Input file: <stdin>
# | Check file: /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/CodeGen/X86/byte-constants.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# | [1m[0m[0;1;30m           1: [0m[1m[0;1;46m .build_version macos, 14, 0 [0m
# | [0;1;31mcheck:3'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
[0m# | [0;1;31m[0m[0;1;30m           2: [0m[1m[0;1;46m .section __TEXT,__text,regular,pure_instructions [0m
# | [0;1;31mcheck:3'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[0m# | [0;1;31m[0m[0;1;30m           3: [0m[1m[0;1;46m .att_syntax [0m
# | [0;1;31mcheck:3'0     ~~~~~~~~~~~~~
[0m# | [0;1;31m[0m[0;1;30m           4: [0m[1m[0;1;46m .section __DATA,__data [0m
# | [0;1;31mcheck:3'0     ~~~~~~~~~~~~~~~~~~~~~~~~
[0m# | [0;1;31m[0m[0;1;30m           5: [0m[1m[0;1;46m .globl _x ## @x [0m
# | [0;1;31mcheck:3'0     ~~~~~~~~~~~~~~~~~
[0m# | [0;1;31m[0m[0;1;35mcheck:3'1      ?                possible intended match
[0m# | [0;1;35m[0m[0;1;30m           6: [0m[1m[0;1;46m .p2align 3, 0x0 [0m
# | [0;1;31mcheck:3'0     ~~~~~~~~~~~~~~~~~
[0m# | [0;1;31m[0m[0;1;30m           7: [0m[1m[0;1;46m_x: [0m
# | [0;1;31mcheck:3'0     ~~~~
[0m# | [0;1;31m[0m[0;1;30m           8: [0m[1m[0;1;46m .quad 10 ## 0xa [0m
# | [0;1;31mcheck:3'0     ~~~~~~~~~~~~~~~~~
[0m# | [0;1;31m[0m[0;1;30m           9: [0m[1m[0;1;46m [0m
# | [0;1;31mcheck:3'0     ~
[0m# | [0;1;31m[0m[0;1;30m          10: [0m[1m[0;1;46m .globl _b ## @b [0m
# | [0;1;31mcheck:3'0     ~~~~~~~~~~~~~~~~~
[0m# | [0;1;31m[0m[0;1;30m          11: [0m[1m[0;1;46m_b: [0m
...

```

</details>

https://github.com/llvm/llvm-project/pull/178666