From 3b91807da740b76f05024c64d98f0f1a3c0bd0e7 Mon Sep 17 00:00:00 2001
From: Andrew Lenharth <andrewl@lenharth.org>
Date: Mon, 27 Jun 2005 15:36:48 +0000
Subject: [PATCH] who said we had to use the return address in the return
 address register.  Might save a move in many cases

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22293 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Alpha/AlphaISelPattern.cpp | 7 +++++--
 lib/Target/Alpha/AlphaRegisterInfo.td | 6 +++---
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index e2610c44064..9c9b3d6db08 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -179,6 +179,10 @@ namespace {
     {
       BuildMI(BB, Alpha::BIS, 2, Alpha::R26).addReg(RA).addReg(RA);
     }
+    unsigned getRA()
+    {
+      return RA;
+    }
 
   };
 }
@@ -2310,8 +2314,7 @@ void AlphaISel::Select(SDOperand N) {
       Select(N.getOperand(0));
       break;
     }
-    AlphaLowering.restoreRA(BB);
-    BuildMI(BB, Alpha::RET, 1, Alpha::R31).addReg(Alpha::R26); // Just emit a 'ret' instruction
+    BuildMI(BB, Alpha::RET, 1, Alpha::R31).addReg(AlphaLowering.getRA()); // Just emit a 'ret' instruction
     return;
 
   case ISD::TRUNCSTORE:
diff --git a/lib/Target/Alpha/AlphaRegisterInfo.td b/lib/Target/Alpha/AlphaRegisterInfo.td
index 7957bedbf74..8ead9760f89 100644
--- a/lib/Target/Alpha/AlphaRegisterInfo.td
+++ b/lib/Target/Alpha/AlphaRegisterInfo.td
@@ -78,14 +78,14 @@ def F30 : FPR<30, "$f30">;  def F31 : FPR<31, "$f31">;
   // $28 is undefined after any and all calls
 
 /// Register classes
+// Don't allocate 15, 28, 30, 31
 def GPRC : RegisterClass<i64, 64,
      // Volatile
      [R0, R1, R2, R3, R4, R5, R6, R7, R8, R16, R17, R18, R19, R20, R21, R22,
-      R23, R24, R25, R27,
+      R23, R24, R25, R26, R27,
      // Non-volatile
-     R9, R10, R11, R12, R13, R14, /*R15,*/ R26, /* R28, */ R29 /* R30, R31*/ ]>;
+     R9, R10, R11, R12, R13, R14, R29 ]>;
      // Note: R28 is reserved for the assembler
-     //leave FP alone
 
 // Don't allocate 15, 29, 30, 31
 // Allocation volatiles only for now
-- 
2.11.0