[clang] [CIR][X86] Add support for vpshl/vpshr builtins (PR #179538)

[Matt Arsenault via cfe-commits]

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@@ -1246,8 +1246,23 @@ RValue CIRGenFunction::emitBuiltinExpr(const GlobalDecl &gd, unsigned builtinID,
   case Builtin::BI__builtin_elementwise_canonicalize:
   case Builtin::BI__builtin_elementwise_copysign:
   case Builtin::BI__builtin_elementwise_fma:
-  case Builtin::BI__builtin_elementwise_fshl:
-  case Builtin::BI__builtin_elementwise_fshr:
+    return errorBuiltinNYI(*this, e, builtinID);
+  case Builtin::BI__builtin_elementwise_fshl: {
+    mlir::Location loc = getLoc(e->getExprLoc());
+    mlir::Value a = emitScalarExpr(e->getArg(0));
+    mlir::Value b = emitScalarExpr(e->getArg(1));
+    mlir::Value c = emitScalarExpr(e->getArg(2));
+    return RValue::get(builder.emitIntrinsicCallOp(loc, "fshl", a.getType(),
+                                                   mlir::ValueRange{a, b, c}));
+  }
+  case Builtin::BI__builtin_elementwise_fshr: {
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arsenm wrote:

These cases aren't in the title and aren't tested 

https://github.com/llvm/llvm-project/pull/179538