0042-Xtensa-Lowering-Exception-Selector-and-Pointer.patch

From 8d4427a03e32addee307dba758b117c6c3714c50 Mon Sep 17 00:00:00 2001
From: Andrei Safronov <safronov@espressif.com>
Date: Wed, 5 Apr 2023 00:58:59 +0300
Subject: [PATCH 042/158] [Xtensa] Lowering Exception Selector and Pointer

 Registers.
---
 llvm/lib/Target/Xtensa/XtensaISelLowering.cpp | 14 ++++++++++++++
 llvm/lib/Target/Xtensa/XtensaISelLowering.h   |  9 +++++++++
 2 files changed, 23 insertions(+)

diff --git a/llvm/lib/Target/Xtensa/XtensaISelLowering.cpp b/llvm/lib/Target/Xtensa/XtensaISelLowering.cpp
index d848823dd758..4fd119ea7f05 100644
--- a/llvm/lib/Target/Xtensa/XtensaISelLowering.cpp
+++ b/llvm/lib/Target/Xtensa/XtensaISelLowering.cpp
@@ -326,6 +326,20 @@ bool XtensaTargetLowering::isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,
  return false;
 }
 
+/// If a physical register, this returns the register that receives the
+/// exception address on entry to an EH pad.
+Register XtensaTargetLowering::getExceptionPointerRegister(
+    const Constant *PersonalityFn) const {
+  return Xtensa::A2;
+}
+
+/// If a physical register, this returns the register that receives the
+/// exception typeid on entry to a landing pad.
+Register XtensaTargetLowering::getExceptionSelectorRegister(
+    const Constant *PersonalityFn) const {
+  return Xtensa::A3;
+}
+
 bool XtensaTargetLowering::isOffsetFoldingLegal(
     const GlobalAddressSDNode *GA) const {
   // The Xtensa target isn't yet aware of offsets.
diff --git a/llvm/lib/Target/Xtensa/XtensaISelLowering.h b/llvm/lib/Target/Xtensa/XtensaISelLowering.h
index 3f9929b9da2f..222a07611334 100644
--- a/llvm/lib/Target/Xtensa/XtensaISelLowering.h
+++ b/llvm/lib/Target/Xtensa/XtensaISelLowering.h
@@ -102,6 +102,15 @@ public:
   bool isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,
                                   EVT VT) const override;
 
+  /// If a physical register, this returns the register that receives the
+  /// exception address on entry to an EH pad.
+  Register
+  getExceptionPointerRegister(const Constant *PersonalityFn) const override;
+  /// If a physical register, this returns the register that receives the
+  /// exception typeid on entry to a landing pad.
+  Register
+  getExceptionSelectorRegister(const Constant *PersonalityFn) const override;
+
   bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override;
   bool isFPImmLegal(const APFloat &Imm, EVT VT,
                     bool ForCodeSize) const override;
-- 
2.40.1