[clang] [CIR] Add math and builtin intrinsics support (PR #175233)

[Andy Kaylor via cfe-commits]

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@@ -1080,40 +1191,67 @@ RValue CIRGenFunction::emitBuiltinExpr(const GlobalDecl &gd, unsigned builtinID,
         convertType(e->getType())));
   }
   case Builtin::BI__builtin_nondeterministic_value:
-  case Builtin::BI__builtin_elementwise_abs:
     return errorBuiltinNYI(*this, e, builtinID);
+  case Builtin::BI__builtin_elementwise_abs: {
+    mlir::Type cirTy = convertType(e->getArg(0)->getType());
+    bool isIntTy = cir::isIntOrVectorOfIntType(cirTy);
+    if (!isIntTy)
+      return emitUnaryFPBuiltin<cir::FAbsOp>(*this, *e);
+    mlir::Value arg = emitScalarExpr(e->getArg(0));
+    mlir::Value result = cir::AbsOp::create(builder, getLoc(e->getExprLoc()),
+                                            arg.getType(), arg, false);
+    return RValue::get(result);
+  }
   case Builtin::BI__builtin_elementwise_acos:
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andykaylor wrote:

Can you remove the redundant handlers?

https://github.com/llvm/llvm-project/pull/175233