[llvm] [X86] SimplifyDemandedVectorEltsForTargetNode - add X86ISD::MOVDDUP handling (PR #140237)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/144/builds/25322

<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 'Clang :: Analysis/ftime-trace.cpp' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/clang -cc1 -internal-isystem /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/lib/clang/21/include -nostdsysteminc -analyze -analyzer-constraints=range -setup-static-analyzer -analyzer-checker=core /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/clang/test/Analysis/ftime-trace.cpp -ftime-trace=/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.raw.json -ftime-trace-granularity=0 -verify # RUN: at line 1
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/clang -cc1 -internal-isystem /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/lib/clang/21/include -nostdsysteminc -analyze -analyzer-constraints=range -setup-static-analyzer -analyzer-checker=core /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/clang/test/Analysis/ftime-trace.cpp -ftime-trace=/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.raw.json -ftime-trace-granularity=0 -verify
"/usr/bin/python3.10" -c 'import json, sys; print(json.dumps(json.load(sys.stdin), indent=4))' < /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.raw.json > /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json # RUN: at line 2
+ /usr/bin/python3.10 -c 'import json, sys; print(json.dumps(json.load(sys.stdin), indent=4))'
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck --input-file=/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json --check-prefix=CHECK /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/clang/test/Analysis/ftime-trace.cpp # RUN: at line 3
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/FileCheck --input-file=/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json --check-prefix=CHECK /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/clang/test/Analysis/ftime-trace.cpp
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/clang/test/Analysis/ftime-trace.cpp:34:11: error: CHECK: expected string not found in input
// CHECK: "name": "Total CheckerManager::runCheckersForStmt (Pre)",
          ^
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json:2474:3: note: scanning from here
 }
  ^
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json:2674:2: note: possible intended match here
 "name": "Total CheckerManager::runCheckersForStmt (Post)",
 ^

Input file: /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/tools/clang/test/Analysis/Output/ftime-trace.cpp.tmp.formatted.json
Check file: /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/clang/test/Analysis/ftime-trace.cpp

-dump-input=help explains the following input dump.

Input was:
<<<<<<
            1: { 
            2:  "traceEvents": [ 
            3:  { 
            4:  "pid": 970905, 
            5:  "tid": 970905, 
            6:  "ts": 6274, 
            7:  "ph": "X", 
            8:  "dur": 172, 
            9:  "name": "ParseDeclarationOrFunctionDefinition", 
           10:  "args": { 
           11:  "detail": "/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/clang/test/Analysis/ftime-trace.cpp:48:1" 
           12:  } 
           13:  }, 
           14:  { 
           15:  "pid": 970905, 
           16:  "tid": 970905, 
           17:  "ts": 6811, 
           18:  "ph": "X", 
           19:  "dur": 28, 
           20:  "name": "EvaluateForOverflow", 
           21:  "args": { 
           22:  "detail": "</home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/clang/test/Analysis/ftime-trace.cpp:53:9, col:13>" 
...

```

</details>

https://github.com/llvm/llvm-project/pull/140237