[llvm] [AArch64] Lower scalable i1 vector add reduction to cntp (PR #99031)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `fuchsia-x86_64-linux` running on `fuchsia-debian-64-us-central1-a-1` while building `llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/11/builds/2124

Here is the relevant piece of the build log for the reference:
```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/fuchsia-linux.py ...' (failure)
...
[1311/1316] Building CXX object unittests/Transforms/Scalar/CMakeFiles/ScalarTests.dir/LoopPassManagerTest.cpp.o
clang++: warning: optimization flag '-ffat-lto-objects' is not supported [-Wignored-optimization-argument]
[1312/1316] Linking CXX executable unittests/Transforms/Scalar/ScalarTests
[1312/1316] Running the LLVM regression tests
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/ld.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using lld-link: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/lld-link
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld64.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/ld64.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using wasm-ld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/wasm-ld
-- Testing: 54891 tests, 60 workers --
Testing:  0..
FAIL: LLVM :: CodeGen/AArch64/sve-i1-add-reduce.ll (5237 of 54891)
******************** TEST 'LLVM :: CodeGen/AArch64/sve-i1-add-reduce.ll' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 2: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/llc -mtriple=aarch64-linux-gnu -mattr=+sve < /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/AArch64/sve-i1-add-reduce.ll | /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/AArch64/sve-i1-add-reduce.ll
+ /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/llc -mtriple=aarch64-linux-gnu -mattr=+sve
+ /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/AArch64/sve-i1-add-reduce.ll
LLVM ERROR: Cannot select: 0x55c68a88d670: nxv2i64 = AArch64ISD::UADDV_PRED 0x55c68a88d980, 0x55c68a88d600
  0x55c68a88d980: nxv16i1 = AArch64ISD::PTRUE TargetConstant:i32<31>
    0x55c68a88d910: i32 = TargetConstant<31>
  0x55c68a88d600: nxv16i1,ch = CopyFromReg 0x55c68a809688, Register:nxv16i1 %0
    0x55c68a88d590: nxv16i1 = Register %0
In function: uaddv_zexti8_nxv16i1
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/AArch64/sve-i1-add-reduce.ll

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
********************
Failed Tests (1):
  LLVM :: CodeGen/AArch64/sve-i1-add-reduce.ll


Testing Time: 73.41s

Total Discovered Tests: 60536
  Skipped          :    33 (0.05%)
  Unsupported      : 16477 (27.22%)
  Passed           : 43959 (72.62%)
  Expectedly Failed:    66 (0.11%)
  Failed           :     1 (0.00%)
[1313/1316] Building CXX object tools/clang/unittests/Tooling/CMakeFiles/ToolingTests.dir/SourceCodeTest.cpp.o
clang++: warning: optimization flag '-ffat-lto-objects' is not supported [-Wignored-optimization-argument]
[1314/1316] Linking CXX executable tools/clang/unittests/Tooling/ToolingTests
FAILED: test/CMakeFiles/check-llvm /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/test/CMakeFiles/check-llvm 
Step 7 (check) failure: check (failure)
...
[1311/1316] Building CXX object unittests/Transforms/Scalar/CMakeFiles/ScalarTests.dir/LoopPassManagerTest.cpp.o
clang++: warning: optimization flag '-ffat-lto-objects' is not supported [-Wignored-optimization-argument]
[1312/1316] Linking CXX executable unittests/Transforms/Scalar/ScalarTests
[1312/1316] Running the LLVM regression tests
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/ld.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using lld-link: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/lld-link
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld64.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/ld64.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using wasm-ld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/wasm-ld
-- Testing: 54891 tests, 60 workers --
Testing:  0..
FAIL: LLVM :: CodeGen/AArch64/sve-i1-add-reduce.ll (5237 of 54891)
******************** TEST 'LLVM :: CodeGen/AArch64/sve-i1-add-reduce.ll' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 2: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/llc -mtriple=aarch64-linux-gnu -mattr=+sve < /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/AArch64/sve-i1-add-reduce.ll | /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/AArch64/sve-i1-add-reduce.ll
+ /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/llc -mtriple=aarch64-linux-gnu -mattr=+sve
+ /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/AArch64/sve-i1-add-reduce.ll
LLVM ERROR: Cannot select: 0x55c68a88d670: nxv2i64 = AArch64ISD::UADDV_PRED 0x55c68a88d980, 0x55c68a88d600
  0x55c68a88d980: nxv16i1 = AArch64ISD::PTRUE TargetConstant:i32<31>
    0x55c68a88d910: i32 = TargetConstant<31>
  0x55c68a88d600: nxv16i1,ch = CopyFromReg 0x55c68a809688, Register:nxv16i1 %0
    0x55c68a88d590: nxv16i1 = Register %0
In function: uaddv_zexti8_nxv16i1
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/AArch64/sve-i1-add-reduce.ll

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
********************
Failed Tests (1):
  LLVM :: CodeGen/AArch64/sve-i1-add-reduce.ll


Testing Time: 73.41s

Total Discovered Tests: 60536
  Skipped          :    33 (0.05%)
  Unsupported      : 16477 (27.22%)
  Passed           : 43959 (72.62%)
  Expectedly Failed:    66 (0.11%)
  Failed           :     1 (0.00%)
[1313/1316] Building CXX object tools/clang/unittests/Tooling/CMakeFiles/ToolingTests.dir/SourceCodeTest.cpp.o
clang++: warning: optimization flag '-ffat-lto-objects' is not supported [-Wignored-optimization-argument]
[1314/1316] Linking CXX executable tools/clang/unittests/Tooling/ToolingTests
FAILED: test/CMakeFiles/check-llvm /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-z_u698d5/test/CMakeFiles/check-llvm 

```

https://github.com/llvm/llvm-project/pull/99031