0037-Xtensa-Add-subtargets-ESP32.-ESP8266-and-ESP32-S2.patch

From 062999409536b8f89edfb8f52958bd94cb5e9713 Mon Sep 17 00:00:00 2001
From: Andrei Safronov <safronov@espressif.com>
Date: Wed, 5 Apr 2023 00:58:53 +0300
Subject: [PATCH 037/158] [Xtensa] Add subtargets ESP32. ESP8266 and ESP32-S2.

Make ESP32 default subtarget.
---
 llvm/lib/Target/Xtensa/Xtensa.td           | 12 ++++++++++++
 llvm/lib/Target/Xtensa/XtensaSubtarget.cpp |  2 +-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/Xtensa/Xtensa.td b/llvm/lib/Target/Xtensa/Xtensa.td
index f141a6db02b5..b17442717c21 100644
--- a/llvm/lib/Target/Xtensa/Xtensa.td
+++ b/llvm/lib/Target/Xtensa/Xtensa.td
@@ -161,6 +161,18 @@ class Proc<string Name, list<SubtargetFeature> Features>
 
 def : Proc<"generic", []>;
 
+def : Proc<"esp32", [FeatureDensity, FeatureSingleFloat, FeatureLoop, FeatureMAC16, FeatureWindowed, FeatureBoolean, 
+                     FeatureSEXT, FeatureNSA, FeatureMul32, FeatureMul32High, FeatureDFPAccel, FeatureS32C1I, FeatureTHREADPTR, FeatureDiv32,
+                     FeatureATOMCTL, FeatureMEMCTL, FeatureDebug, FeatureException, FeatureHighPriInterrupts, FeatureCoprocessor,
+                     FeatureInterrupt, FeatureRelocatableVector, FeatureTimerInt, FeaturePRID, FeatureRegionProtection, FeatureMiscSR]>;
+
+def : Proc<"esp8266", [FeatureDensity, FeatureNSA, FeatureMul32, FeatureExtendedL32R, FeatureDebug, FeatureException, FeatureHighPriInterrupts,
+                       FeatureInterrupt, FeatureRelocatableVector, FeatureTimerInt, FeatureRegionProtection, FeaturePRID]>;
+
+def : Proc<"esp32-s2", [FeatureDensity, FeatureWindowed, FeatureSEXT, FeatureNSA, FeatureMul32, FeatureMul32High, FeatureTHREADPTR, FeatureDiv32,
+                        FeatureDebug, FeatureException, FeatureHighPriInterrupts, FeatureCoprocessor, FeatureInterrupt, FeatureRelocatableVector,
+						FeatureTimerInt, FeaturePRID, FeatureRegionProtection, FeatureMiscSR]>;
+
 //===----------------------------------------------------------------------===//
 // Register File Description
 //===----------------------------------------------------------------------===//
diff --git a/llvm/lib/Target/Xtensa/XtensaSubtarget.cpp b/llvm/lib/Target/Xtensa/XtensaSubtarget.cpp
index 8c259dd33f2f..106884d8a031 100644
--- a/llvm/lib/Target/Xtensa/XtensaSubtarget.cpp
+++ b/llvm/lib/Target/Xtensa/XtensaSubtarget.cpp
@@ -29,7 +29,7 @@ XtensaSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
   StringRef CPUName = CPU;
   if (CPUName.empty()) {
     // set default cpu name
-    CPUName = "generic";
+    CPUName = "esp32";
   }
 
   HasDensity = false;
-- 
2.40.1