From 53145c4020d237d2572b4109e0d425863dc34f9b Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Mon, 17 Aug 2026 02:56:45 +0800
Subject: [RISCV][GlobalISel] Generate implicit-def selection

---
 backend/lib/Target/RISCV/RISCVGISelInteger.rccdesc | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'backend/lib/Target/RISCV/RISCVGISelInteger.rccdesc')

diff --git a/backend/lib/Target/RISCV/RISCVGISelInteger.rccdesc b/backend/lib/Target/RISCV/RISCVGISelInteger.rccdesc
index 1667f66..f40e5d4 100644
--- a/backend/lib/Target/RISCV/RISCVGISelInteger.rccdesc
+++ b/backend/lib/Target/RISCV/RISCVGISelInteger.rccdesc
@@ -1,4 +1,14 @@
 selection_rules:
+  -
+    id: select_g_implicit_def
+    priority: 100
+    match:
+      opcode: G_IMPLICIT_DEF
+    apply:
+      instructions:
+        - opcode: IMPLICIT_DEF
+          root: true
+          operands: [{ operand: 0 }]
   -
     id: select_g_sext_s64_s32
     priority: 500
-- 
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