[llvm] [DAG] combineTruncationShuffle - ensure the *_EXTEND_VECTOR_INREG node didn't come from a smaller type (PR #164160)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-arm-ubuntu` running on `linaro-lldb-arm-ubuntu` while building `llvm` at step 6 "test".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/18/builds/22068

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

```
Step 6 (test) failure: build (failure)
...
PASS: lldb-unit :: Core/./LLDBCoreTests/95/470 (2464 of 3730)
PASS: lldb-unit :: Core/./LLDBCoreTests/96/470 (2465 of 3730)
PASS: lldb-unit :: Core/./LLDBCoreTests/97/470 (2466 of 3730)
PASS: lldb-unit :: Core/./LLDBCoreTests/98/470 (2467 of 3730)
PASS: lldb-unit :: Core/./LLDBCoreTests/99/470 (2468 of 3730)
PASS: lldb-unit :: DAP/./DAPTests/0/77 (2469 of 3730)
PASS: lldb-unit :: DAP/./DAPTests/1/77 (2470 of 3730)
PASS: lldb-unit :: DAP/./DAPTests/13/77 (2471 of 3730)
PASS: lldb-unit :: DAP/./DAPTests/11/77 (2472 of 3730)
PASS: lldb-unit :: DAP/./DAPTests/12/77 (2473 of 3730)
FAIL: lldb-unit :: DAP/./DAPTests/10/77 (2474 of 3730)
******************** TEST 'lldb-unit :: DAP/./DAPTests/10/77' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/tools/lldb/unittests/DAP/./DAPTests-lldb-unit-1976161-10-77.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=77 GTEST_SHARD_INDEX=10 /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/tools/lldb/unittests/DAP/./DAPTests
--

Script:
--
/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/tools/lldb/unittests/DAP/./DAPTests --gtest_filter=DisconnectRequestHandlerTest.DisconnectTriggersTerminateCommands
--
../llvm-project/lldb/unittests/DAP/Handler/DisconnectTest.cpp:51: Failure
Actual function call count doesn't match EXPECT_CALL(client, Received(Output("1\n")))...
         Expected: to be called once
           Actual: never called - unsatisfied and active

../llvm-project/lldb/unittests/DAP/Handler/DisconnectTest.cpp:52: Failure
Actual function call count doesn't match EXPECT_CALL(client, Received(Output("2\n")))...
         Expected: to be called twice
           Actual: called once - unsatisfied and active


../llvm-project/lldb/unittests/DAP/Handler/DisconnectTest.cpp:51
Actual function call count doesn't match EXPECT_CALL(client, Received(Output("1\n")))...
         Expected: to be called once
           Actual: never called - unsatisfied and active

../llvm-project/lldb/unittests/DAP/Handler/DisconnectTest.cpp:52
Actual function call count doesn't match EXPECT_CALL(client, Received(Output("2\n")))...
         Expected: to be called twice
           Actual: called once - unsatisfied and active



********************
PASS: lldb-unit :: DAP/./DAPTests/14/77 (2475 of 3730)
PASS: lldb-unit :: DAP/./DAPTests/16/77 (2476 of 3730)
PASS: lldb-unit :: DAP/./DAPTests/17/77 (2477 of 3730)
PASS: lldb-unit :: DAP/./DAPTests/15/77 (2478 of 3730)

```

</details>

https://github.com/llvm/llvm-project/pull/164160