[RISCV] Require tail policy argument to builtins to be an integer constant expression

The IR intrinsics use ImmArg for the policy operand so this needs to be enforced as a constant in the frontend.

Differential Revision: https://reviews.llvm.org/D110779

diff --git a/clang/utils/TableGen/RISCVVEmitter.cpp b/clang/utils/TableGen/RISCVVEmitter.cpp
index 1525006..f71df8b 100644 (file)
--- a/clang/utils/TableGen/RISCVVEmitter.cpp
+++ b/clang/utils/TableGen/RISCVVEmitter.cpp
@@ -1184,7 +1184,7 @@ void RVVEmitter::createRVVIntrinsics(
     }
 
     if (HasPolicy) {
-      ProtoMaskSeq.push_back("z");
+      ProtoMaskSeq.push_back("Kz");
     }
 
     // Create Intrinsics for each type and LMUL.