[clang] [CIR] Add support for __builtin_assume_aligned (PR #152152)

[Sirui Mu via cfe-commits]

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@@ -129,6 +129,23 @@ RValue CIRGenFunction::emitBuiltinExpr(const GlobalDecl &gd, unsigned builtinID,
     return RValue::get(nullptr);
   }
 
+  case Builtin::BI__builtin_assume_aligned: {
+    const Expr *ptrExpr = e->getArg(0);
+    mlir::Value ptrValue = emitScalarExpr(ptrExpr);
+    mlir::Value offsetValue =
+        (e->getNumArgs() > 2) ? emitScalarExpr(e->getArg(2)) : nullptr;
+
+    const Expr *alignmentExpr = e->getArg(1);
+    mlir::Attribute alignmentAttr = ConstantEmitter(*this).emitAbstract(
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Lancern wrote:

Updated to use `Expr::getIntegerConstantExpr`. Changes to `ConstantEmitter` are reverted.

https://github.com/llvm/llvm-project/pull/152152