[llvm] [AArch64] Materialize constants via fneg. (PR #80641)

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


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

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``````````bash
git-clang-format --diff 0f8680b9d87fa9e8839bd8e39ce605d64148ace6 1babf7ff06ace0aab5bb5c65c4698cc5367d8325 -- llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index bbe0003951..21f8cbf06c 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -12947,18 +12947,25 @@ static SDValue ConstantBuildVector(SDValue Op, SelectionDAG &DAG,
   if (resolveBuildVector(BVN, DefBits, UndefBits)) {
     auto TryMOVIWithBits = [&](APInt DefBits) {
       SDValue NewOp;
-      if ((NewOp = tryAdvSIMDModImm64(AArch64ISD::MOVIedit, Op, DAG, DefBits)) ||
-          (NewOp = tryAdvSIMDModImm32(AArch64ISD::MOVIshift, Op, DAG, DefBits)) ||
-          (NewOp = tryAdvSIMDModImm321s(AArch64ISD::MOVImsl, Op, DAG, DefBits)) ||
-          (NewOp = tryAdvSIMDModImm16(AArch64ISD::MOVIshift, Op, DAG, DefBits)) ||
+      if ((NewOp =
+               tryAdvSIMDModImm64(AArch64ISD::MOVIedit, Op, DAG, DefBits)) ||
+          (NewOp =
+               tryAdvSIMDModImm32(AArch64ISD::MOVIshift, Op, DAG, DefBits)) ||
+          (NewOp =
+               tryAdvSIMDModImm321s(AArch64ISD::MOVImsl, Op, DAG, DefBits)) ||
+          (NewOp =
+               tryAdvSIMDModImm16(AArch64ISD::MOVIshift, Op, DAG, DefBits)) ||
           (NewOp = tryAdvSIMDModImm8(AArch64ISD::MOVI, Op, DAG, DefBits)) ||
           (NewOp = tryAdvSIMDModImmFP(AArch64ISD::FMOV, Op, DAG, DefBits)))
         return NewOp;
 
       APInt NotDefBits = ~DefBits;
-      if ((NewOp = tryAdvSIMDModImm32(AArch64ISD::MVNIshift, Op, DAG, NotDefBits)) ||
-          (NewOp = tryAdvSIMDModImm321s(AArch64ISD::MVNImsl, Op, DAG, NotDefBits)) ||
-          (NewOp = tryAdvSIMDModImm16(AArch64ISD::MVNIshift, Op, DAG, NotDefBits)))
+      if ((NewOp = tryAdvSIMDModImm32(AArch64ISD::MVNIshift, Op, DAG,
+                                      NotDefBits)) ||
+          (NewOp = tryAdvSIMDModImm321s(AArch64ISD::MVNImsl, Op, DAG,
+                                        NotDefBits)) ||
+          (NewOp =
+               tryAdvSIMDModImm16(AArch64ISD::MVNIshift, Op, DAG, NotDefBits)))
         return NewOp;
       return SDValue();
     };

``````````

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https://github.com/llvm/llvm-project/pull/80641