[llvm] RegAllocFast: Mark unspilled implicit_def physreg defs dead (PR #226295)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `amdgpu-clang-flang` running on `AMD-bb-w-05` while building `llvm` at step 3 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/234/builds/5535

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

```
Step 3 (annotate) failure: 'python ../llvm.src/offload/ci/openmp-offload-amdgpu-clang-flang.py ...' (failure)
...
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/static_linking.c (1429 of 1438)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/std_complex_arithmetic.cpp (1430 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/array_reductions.cpp (1431 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/assert.cpp (1432 of 1438)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/multiple_reductions.cpp (1433 of 1438)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/multiple_reductions_simple.c (1434 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/multiple_reductions.cpp (1435 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/multiple_reductions_simple.c (1436 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/ompx_saxpy_mixed.c (1437 of 1438)
TIMEOUT: libomptarget :: amdgpu-amd-amdhsa :: offloading/parallel_offloading_map.cpp (1438 of 1438)
******************** TEST 'libomptarget :: amdgpu-amd-amdhsa :: offloading/parallel_offloading_map.cpp' FAILED ********************
Exit Code: -9
Timeout: Reached timeout of 100 seconds

Command Output (stdout):
--
# RUN: at line 1
/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./bin/clang++ -fopenmp    -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test -I /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include/cuda -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include/hip -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/kernel/include -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src  -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib -Xoffload-linker -L/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/amdgpu-amd-amdhsa -Xoffload-linker -L/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/clang/24/lib/amdgpu-amd-amdhsa  -fopenmp-targets=amdgpu-amd-amdhsa /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/offloading/parallel_offloading_map.cpp -o /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/offload/test/amdgpu-amd-amdhsa/offloading/Output/parallel_offloading_map.cpp.tmp -Xoffload-linker -lc -Xoffload-linker -lm -Xoffload-linker -lompdevice && /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/offload/test/amdgpu-amd-amdhsa/offloading/Output/parallel_offloading_map.cpp.tmp | /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./bin/FileCheck /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/offloading/parallel_offloading_map.cpp
# executed command: /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./bin/clang++ -fopenmp -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test -I /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include/cuda -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include/hip -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/kernel/include -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib -Xoffload-linker -L/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/amdgpu-amd-amdhsa -Xoffload-linker -L/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/clang/24/lib/amdgpu-amd-amdhsa -fopenmp-targets=amdgpu-amd-amdhsa /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/offloading/parallel_offloading_map.cpp -o /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/offload/test/amdgpu-amd-amdhsa/offloading/Output/parallel_offloading_map.cpp.tmp -Xoffload-linker -lc -Xoffload-linker -lm -Xoffload-linker -lompdevice
# note: command had no output on stdout or stderr
# executed command: /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/offload/test/amdgpu-amd-amdhsa/offloading/Output/parallel_offloading_map.cpp.tmp
# note: command had no output on stdout or stderr
# error: command failed with exit status: -9
# error: command reached timeout: True
# executed command: /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./bin/FileCheck /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/offloading/parallel_offloading_map.cpp
# note: command had no output on stdout or stderr
# error: command failed with exit status: -9
# error: command reached timeout: True

--

********************
Slowest Tests (20 of 1221):
--------------------------------------------------------------------------
100.08s: libomptarget :: amdgpu-amd-amdhsa :: offloading/parallel_offloading_map.cpp
24.52s: libomptarget :: amdgpu-amd-amdhsa :: offloading/multiple_reductions.cpp
21.00s: libomptarget :: amdgpu-amd-amdhsa :: offloading/array_reductions.cpp
11.39s: libomptarget :: amdgpu-amd-amdhsa :: offloading/bug49021.cpp
10.83s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/multiple_reductions.cpp
10.62s: libomptarget :: amdgpu-amd-amdhsa :: offloading/mandatory_but_no_devices.c
9.91s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/bug49021.cpp
9.34s: libomptarget :: amdgpu-amd-amdhsa :: offloading/parallel_target_teams_reduction_max.cpp
9.18s: libomptarget :: amdgpu-amd-amdhsa :: offloading/gpupgo/pgo_device_and_host.c
8.55s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/std_complex_arithmetic.cpp
8.47s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/array_reductions.cpp
8.37s: libomptarget :: amdgpu-amd-amdhsa :: tools/omp-kernel-replay/record-replay-diff-teams-threads.cpp
7.81s: libomptarget :: amdgpu-amd-amdhsa :: mapping/ompx_hold/omp_target_disassociate_ptr.c
7.65s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/complex_reduction.cpp
7.61s: libomptarget :: amdgpu-amd-amdhsa :: offloading/bug51781.c
Step 9 (Add check check-offload) failure: Add check check-offload (failure)
...
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/static_linking.c (1429 of 1438)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/std_complex_arithmetic.cpp (1430 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/array_reductions.cpp (1431 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/assert.cpp (1432 of 1438)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/multiple_reductions.cpp (1433 of 1438)
PASS: libomptarget :: x86_64-unknown-linux-gnu :: offloading/multiple_reductions_simple.c (1434 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/multiple_reductions.cpp (1435 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/multiple_reductions_simple.c (1436 of 1438)
PASS: libomptarget :: amdgpu-amd-amdhsa :: offloading/ompx_saxpy_mixed.c (1437 of 1438)
TIMEOUT: libomptarget :: amdgpu-amd-amdhsa :: offloading/parallel_offloading_map.cpp (1438 of 1438)
******************** TEST 'libomptarget :: amdgpu-amd-amdhsa :: offloading/parallel_offloading_map.cpp' FAILED ********************
Exit Code: -9
Timeout: Reached timeout of 100 seconds

Command Output (stdout):
--
# RUN: at line 1
/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./bin/clang++ -fopenmp    -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test -I /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include/cuda -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include/hip -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/kernel/include -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src  -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib -Xoffload-linker -L/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/amdgpu-amd-amdhsa -Xoffload-linker -L/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/clang/24/lib/amdgpu-amd-amdhsa  -fopenmp-targets=amdgpu-amd-amdhsa /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/offloading/parallel_offloading_map.cpp -o /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/offload/test/amdgpu-amd-amdhsa/offloading/Output/parallel_offloading_map.cpp.tmp -Xoffload-linker -lc -Xoffload-linker -lm -Xoffload-linker -lompdevice && /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/offload/test/amdgpu-amd-amdhsa/offloading/Output/parallel_offloading_map.cpp.tmp | /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./bin/FileCheck /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/offloading/parallel_offloading_map.cpp
# executed command: /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./bin/clang++ -fopenmp -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test -I /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include/cuda -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/include/hip -I /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/../languages/kernel/include -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib -L /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib -Xoffload-linker -L/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/amdgpu-amd-amdhsa -Xoffload-linker -L/home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./lib/clang/24/lib/amdgpu-amd-amdhsa -fopenmp-targets=amdgpu-amd-amdhsa /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/offloading/parallel_offloading_map.cpp -o /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/offload/test/amdgpu-amd-amdhsa/offloading/Output/parallel_offloading_map.cpp.tmp -Xoffload-linker -lc -Xoffload-linker -lm -Xoffload-linker -lompdevice
# note: command had no output on stdout or stderr
# executed command: /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/runtimes/runtimes-bins/offload/test/amdgpu-amd-amdhsa/offloading/Output/parallel_offloading_map.cpp.tmp
# note: command had no output on stdout or stderr
# error: command failed with exit status: -9
# error: command reached timeout: True
# executed command: /home/botworker/bbot/amdgpu-clang-flang/build/llvm.build/./bin/FileCheck /home/botworker/bbot/amdgpu-clang-flang/llvm.src/offload/test/offloading/parallel_offloading_map.cpp
# note: command had no output on stdout or stderr
# error: command failed with exit status: -9
# error: command reached timeout: True

--

********************
Slowest Tests (20 of 1221):
--------------------------------------------------------------------------
100.08s: libomptarget :: amdgpu-amd-amdhsa :: offloading/parallel_offloading_map.cpp
24.52s: libomptarget :: amdgpu-amd-amdhsa :: offloading/multiple_reductions.cpp
21.00s: libomptarget :: amdgpu-amd-amdhsa :: offloading/array_reductions.cpp
11.39s: libomptarget :: amdgpu-amd-amdhsa :: offloading/bug49021.cpp
10.83s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/multiple_reductions.cpp
10.62s: libomptarget :: amdgpu-amd-amdhsa :: offloading/mandatory_but_no_devices.c
9.91s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/bug49021.cpp
9.34s: libomptarget :: amdgpu-amd-amdhsa :: offloading/parallel_target_teams_reduction_max.cpp
9.18s: libomptarget :: amdgpu-amd-amdhsa :: offloading/gpupgo/pgo_device_and_host.c
8.55s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/std_complex_arithmetic.cpp
8.47s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/array_reductions.cpp
8.37s: libomptarget :: amdgpu-amd-amdhsa :: tools/omp-kernel-replay/record-replay-diff-teams-threads.cpp
7.81s: libomptarget :: amdgpu-amd-amdhsa :: mapping/ompx_hold/omp_target_disassociate_ptr.c
7.65s: libomptarget :: x86_64-unknown-linux-gnu :: offloading/complex_reduction.cpp
7.61s: libomptarget :: amdgpu-amd-amdhsa :: offloading/bug51781.c

```

</details>

https://github.com/llvm/llvm-project/pull/226295