[llvm] [X86] detectPMADDUBSW - use SDPatternMatch to handle some of the commutative matching for the zext/sext pairs. NFC. (PR #165861)

[via llvm-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/X86/X86ISelLowering.cpp --diff_from_common_commit
``````````

:warning:
The reproduction instructions above might return results for more than one PR
in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
:warning:

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index d8ac9f515..007074c3f 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -54474,11 +54474,12 @@ static SDValue detectPMADDUBSW(SDValue In, EVT VT, SelectionDAG &DAG,
 
   // See if this is a signed saturation of an ADD, adding pairs of multiplies
   // from even/odd elements, from zero_extend/sign_extend operands.
-  // 
+  //
   // TODO: Handle constant vectors and use knownbits/computenumsignbits?
   SDValue N00, N01, N10, N11;
-  if (!sd_match(SSatVal, m_Add(m_Mul(m_ZExt(m_Value(N00)), m_SExt(m_Value(N01))),
-                               m_Mul(m_ZExt(m_Value(N10)), m_SExt(m_Value(N11))))))
+  if (!sd_match(SSatVal,
+                m_Add(m_Mul(m_ZExt(m_Value(N00)), m_SExt(m_Value(N01))),
+                      m_Mul(m_ZExt(m_Value(N10)), m_SExt(m_Value(N11))))))
     return SDValue();
 
   // Ensure the extend is from vXi8.

``````````

</details>


https://github.com/llvm/llvm-project/pull/165861