[clang] [clang] VectorExprEvaluator::VisitCallExpr - add constant folding for X86 pslldqi/psrldqi infrinsics (PR #157403)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,c -- clang/lib/AST/ExprConstant.cpp clang/test/CodeGen/X86/avx2-builtins.c clang/test/CodeGen/X86/sse2-builtins.c
``````````

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in a stack if you are using a stacked PR workflow. You can limit the results by
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index c7ee14e63..0ae958f9b 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -12120,8 +12120,9 @@ bool VectorExprEvaluator::VisitCallExpr(const CallExpr *E) {
     SmallVector<APValue, 64> Result;
     Result.resize(NumElts, APValue(0));
 
-    bool IsLeft = (E->getBuiltinCallee() == X86::BI__builtin_ia32_pslldqi128_byteshift ||
-                  E->getBuiltinCallee() == X86::BI__builtin_ia32_pslldqi256_byteshift);
+    bool IsLeft =
+        (E->getBuiltinCallee() == X86::BI__builtin_ia32_pslldqi128_byteshift ||
+         E->getBuiltinCallee() == X86::BI__builtin_ia32_pslldqi256_byteshift);
 
     if (ShiftVal >= LaneBytes)
       return Success(APValue(Result.data(), Result.size()), E);

``````````

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https://github.com/llvm/llvm-project/pull/157403