From 0b2648bac1c4c99aeffac5529aa1abb932eb4411 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@sifive.com>
Date: Thu, 2 Feb 2023 09:58:08 -0800
Subject: [PATCH] [RISCV] Add CoveredBySubRegs to the X*_PD register class.

Not completely sure what effect this has, but it's certainly true.

Reviewed By: asb

Differential Revision: https://reviews.llvm.org/D143103
---
 llvm/lib/Target/RISCV/RISCVRegisterInfo.td | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/lib/Target/RISCV/RISCVRegisterInfo.td b/llvm/lib/Target/RISCV/RISCVRegisterInfo.td
index adedfe5..301f2ad 100644
--- a/llvm/lib/Target/RISCV/RISCVRegisterInfo.td
+++ b/llvm/lib/Target/RISCV/RISCVRegisterInfo.td
@@ -547,6 +547,7 @@ let RegAltNameIndices = [ABIRegAltName] in {
                                           [Reg, RegP1],
                                           Reg.AltNames> {
       let SubRegIndices = [sub_32, sub_32_hi];
+      let CoveredBySubRegs = 1;
     }
   }
 }
-- 
2.7.4