From 32a365a2dc0096b4421fb3947b32d971b7f34c40 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sat, 15 Aug 2026 04:48:16 +0800
Subject: [GlobalISel] Lower stack operations

---
 backend/lib/Target/RISCV/RISCVTarget.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'backend/lib/Target/RISCV/RISCVTarget.cpp')

diff --git a/backend/lib/Target/RISCV/RISCVTarget.cpp b/backend/lib/Target/RISCV/RISCVTarget.cpp
index 1735386..0c202a2 100644
--- a/backend/lib/Target/RISCV/RISCVTarget.cpp
+++ b/backend/lib/Target/RISCV/RISCVTarget.cpp
@@ -245,8 +245,15 @@ Expected<TargetDescription> createTargetDescription() {
       .ScalarInteger = BooleanContent::ZeroOrOne,
       .ScalarFloatingPoint = BooleanContent::ZeroOrOne,
   };
+  auto StackPointer = physicalRegister(PhysicalRegisterID::X2);
+  if (!StackPointer)
+    return std::unexpected(StackPointer.error());
+  TargetStackInfo StackInfo{
+      .StackPointerRegisterToSaveRestore = *StackPointer,
+      .GrowthDirection = StackGrowthDirection::Down,
+  };
   return TargetDescription::create(std::move(*Instructions), std::move(*Registers),
-                                   std::move(MIRText), BooleanInfo);
+                                   std::move(MIRText), BooleanInfo, StackInfo);
 }
 
 std::shared_ptr<const RegisterMask> createCallPreservedMask(CallingConvention Convention) {
-- 
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