[clang] [HLSL] Make it possible to assign an array from a cbuffer (PR #134174)

Mon Apr 21 09:43:17 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-ubsan` running on `sanitizer-buildbot9` while building `clang` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/85/builds/7901

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

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 87881 tests, 72 workers --
Testing:  0.. 
FAIL: Clang :: CodeGenHLSL/ArrayAssignable.hlsl (9676 of 87881)
******************** TEST 'Clang :: CodeGenHLSL/ArrayAssignable.hlsl' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/21/include -nostdsysteminc -triple dxil-pc-shadermodel6.3-library -finclude-default-header -emit-llvm -disable-llvm-passes -o - /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl | /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl # RUN: at line 1
+ /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl
+ /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/21/include -nostdsysteminc -triple dxil-pc-shadermodel6.3-library -finclude-default-header -emit-llvm -disable-llvm-passes -o - /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl:15:9: error: resource has implicit register binding [-Whlsl-implicit-binding]
   15 | cbuffer CBArrays {
      |         ^
1 error generated.
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
118.71s: Clang :: Driver/fsanitize.c
79.56s: Clang :: Driver/arm-cortex-cpus-2.c
79.03s: Clang :: Driver/arm-cortex-cpus-1.c
77.40s: Clang :: Preprocessor/riscv-target-features.c
73.66s: Clang :: OpenMP/target_defaultmap_codegen_01.cpp
70.36s: Clang :: OpenMP/target_update_codegen.cpp
60.00s: Clang :: Preprocessor/arm-target-features.c
58.44s: Clang :: Preprocessor/aarch64-target-features.c
53.53s: Clang :: Driver/clang_f_opts.c
52.98s: Clang :: Driver/linux-ld.c
51.69s: Clang :: Preprocessor/predefined-arch-macros.c
47.49s: Clang :: Driver/cl-options.c
46.46s: Clang :: Driver/x86-target-features.c
39.95s: Clang :: Driver/debug-options.c
39.92s: Clang :: Analysis/a_flaky_crash.cpp
38.22s: Clang :: Preprocessor/predefined-macros-no-warnings.c
37.99s: LLVM :: CodeGen/RISCV/attributes.ll
Step 11 (stage2/ubsan check) failure: stage2/ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 87881 tests, 72 workers --
Testing:  0.. 
FAIL: Clang :: CodeGenHLSL/ArrayAssignable.hlsl (9676 of 87881)
******************** TEST 'Clang :: CodeGenHLSL/ArrayAssignable.hlsl' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/21/include -nostdsysteminc -triple dxil-pc-shadermodel6.3-library -finclude-default-header -emit-llvm -disable-llvm-passes -o - /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl | /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl # RUN: at line 1
+ /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl
+ /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/21/include -nostdsysteminc -triple dxil-pc-shadermodel6.3-library -finclude-default-header -emit-llvm -disable-llvm-passes -o - /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl:15:9: error: resource has implicit register binding [-Whlsl-implicit-binding]
   15 | cbuffer CBArrays {
      |         ^
1 error generated.
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
118.71s: Clang :: Driver/fsanitize.c
79.56s: Clang :: Driver/arm-cortex-cpus-2.c
79.03s: Clang :: Driver/arm-cortex-cpus-1.c
77.40s: Clang :: Preprocessor/riscv-target-features.c
73.66s: Clang :: OpenMP/target_defaultmap_codegen_01.cpp
70.36s: Clang :: OpenMP/target_update_codegen.cpp
60.00s: Clang :: Preprocessor/arm-target-features.c
58.44s: Clang :: Preprocessor/aarch64-target-features.c
53.53s: Clang :: Driver/clang_f_opts.c
52.98s: Clang :: Driver/linux-ld.c
51.69s: Clang :: Preprocessor/predefined-arch-macros.c
47.49s: Clang :: Driver/cl-options.c
46.46s: Clang :: Driver/x86-target-features.c
39.95s: Clang :: Driver/debug-options.c
39.92s: Clang :: Analysis/a_flaky_crash.cpp
38.22s: Clang :: Preprocessor/predefined-macros-no-warnings.c
37.99s: LLVM :: CodeGen/RISCV/attributes.ll
Step 13 (stage3/ubsan check) failure: stage3/ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:520: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 84856 tests, 72 workers --
Testing:  0.. 
FAIL: Clang :: CodeGenHLSL/ArrayAssignable.hlsl (9700 of 84856)
******************** TEST 'Clang :: CodeGenHLSL/ArrayAssignable.hlsl' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/lib/clang/21/include -nostdsysteminc -triple dxil-pc-shadermodel6.3-library -finclude-default-header -emit-llvm -disable-llvm-passes -o - /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl | /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl # RUN: at line 1
+ /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl
+ /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/lib/clang/21/include -nostdsysteminc -triple dxil-pc-shadermodel6.3-library -finclude-default-header -emit-llvm -disable-llvm-passes -o - /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl:15:9: error: resource has implicit register binding [-Whlsl-implicit-binding]
   15 | cbuffer CBArrays {
      |         ^
1 error generated.
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGenHLSL/ArrayAssignable.hlsl

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
26.51s: Clang :: Driver/fsanitize.c
23.97s: LLVM :: tools/llvm-reduce/parallel-workitem-kill.ll
19.96s: Clang :: Preprocessor/riscv-target-features.c
17.54s: Clang :: OpenMP/target_defaultmap_codegen_01.cpp
17.23s: Clang :: OpenMP/target_update_codegen.cpp
17.05s: Clang :: Driver/arm-cortex-cpus-2.c
16.55s: Clang :: Driver/arm-cortex-cpus-1.c
14.87s: Clang :: CodeGen/AArch64/sve-intrinsics/acle_sve_reinterpret.c
14.22s: Clang :: Preprocessor/arm-target-features.c
13.79s: Clang :: Preprocessor/aarch64-target-features.c
13.46s: LLVM :: CodeGen/RISCV/attributes.ll
13.40s: LLVM :: CodeGen/AMDGPU/memintrinsic-unroll.ll
12.26s: Clang :: Preprocessor/predefined-arch-macros.c
12.14s: Clang :: CodeGen/AArch64/sve-intrinsics/acle_sve_reinterpret-bfloat.c
12.13s: lit :: shtest-define.py
11.29s: Clang :: Driver/linux-ld.c
11.25s: Clang :: Analysis/a_flaky_crash.cpp

```

</details>

https://github.com/llvm/llvm-project/pull/134174