From 04c868ef502d38c0f62549e5ef49987be6881b5d Mon Sep 17 00:00:00 2001
From: Andrew Lenharth <andrewl@lenharth.org>
Date: Thu, 27 Jan 2005 08:31:19 +0000
Subject: [PATCH] stack frame fix and zero FP reg fix

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19857 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Alpha/AlphaRegisterInfo.cpp | 27 ++++++++++++++++----------
 lib/Target/Alpha/AlphaRegisterInfo.td  |  4 ++--
 2 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/lib/Target/Alpha/AlphaRegisterInfo.cpp b/lib/Target/Alpha/AlphaRegisterInfo.cpp
index 0c5ca352020..e2cb4b0ad50 100644
--- a/lib/Target/Alpha/AlphaRegisterInfo.cpp
+++ b/lib/Target/Alpha/AlphaRegisterInfo.cpp
@@ -208,7 +208,7 @@ void AlphaRegisterInfo::emitPrologue(MachineFunction &MF) const {
   if (NumBytes <= 32767) {
     MI=BuildMI(Alpha::LDA, 2, Alpha::R30).addImm(-NumBytes).addReg(Alpha::R30);
     MBB.insert(MBBI, MI);
-  } else if (NumBytes <= 32767 * 65536) {
+  } else if ((unsigned long)NumBytes <= (unsigned long)32767 * (unsigned long)65536) {
     long y = NumBytes / 65536;
     if (NumBytes % 65536 > 32767)
       ++y;
@@ -217,7 +217,7 @@ void AlphaRegisterInfo::emitPrologue(MachineFunction &MF) const {
     MI=BuildMI(Alpha::LDA, 2, Alpha::R30).addImm(-(NumBytes - y * 65536)).addReg(Alpha::R30);
     MBB.insert(MBBI, MI);
   } else {
-    std::cerr << "Too big a stack frame\n";
+    std::cerr << "Too big a stack frame at " << NumBytes << "\n";
     abort();
   }
 }
@@ -235,14 +235,21 @@ void AlphaRegisterInfo::emitEpilogue(MachineFunction &MF,
 
    if (NumBytes != 0) 
      {
-       if (NumBytes <= 32000) //FIXME: do this better 
-	 {
-	   MI=BuildMI(Alpha::LDA, 2, Alpha::R30).addImm(NumBytes).addReg(Alpha::R30);
-	   MBB.insert(MBBI, MI);
-	 } else {
-	   std::cerr << "Too big a stack frame\n";
-	   abort();
-	 }
+       if (NumBytes <= 32767) {
+         MI=BuildMI(Alpha::LDA, 2, Alpha::R30).addImm(NumBytes).addReg(Alpha::R30);
+         MBB.insert(MBBI, MI);
+       } else if ((unsigned long)NumBytes <= (unsigned long)32767 * (unsigned long)65536) {
+         long y = NumBytes / 65536;
+         if (NumBytes % 65536 > 32767)
+           ++y;
+         MI=BuildMI(Alpha::LDAH, 2, Alpha::R30).addImm(y).addReg(Alpha::R30);
+         MBB.insert(MBBI, MI);
+         MI=BuildMI(Alpha::LDA, 2, Alpha::R30).addImm(NumBytes - y * 65536).addReg(Alpha::R30);
+         MBB.insert(MBBI, MI);
+       } else {
+         std::cerr << "Too big a stack frame at " << NumBytes << "\n";
+         abort();
+       }
      }
 }
 
diff --git a/lib/Target/Alpha/AlphaRegisterInfo.td b/lib/Target/Alpha/AlphaRegisterInfo.td
index 80f264bf88d..51a9b5aa6d2 100644
--- a/lib/Target/Alpha/AlphaRegisterInfo.td
+++ b/lib/Target/Alpha/AlphaRegisterInfo.td
@@ -81,13 +81,13 @@ def GPRC : RegisterClass<i64, 64,
 //Volitle
      [R0, R1, R2, R3, R4, R5, R6, R7, R8, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R27,
 //Non-Volitile
-     R9, R10, R11, R12, R13, R14, R15, R26, /*R28,*/ R29, R30, R31]>;
+     R9, R10, R11, R12, R13, R14, R15, R26, /*R28,*/ R29, R30 /*, R31*/ ]>;
 //R28 is reserved for the assembler
 
 //Don't allocate 15, 29, 30, 31
 //Allocation volatiles only for now
 def FPRC : RegisterClass<f64, 64, [F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, 
 	F10, F11, F12, F13, F14, F15, F16, F17, F18, F19,
-	F20, F21, F22, F23, F24, F25, F26, F27, F28, F29, F30, F31]>;
+	F20, F21, F22, F23, F24, F25, F26, F27, F28, F29, F30]>;
 
 
-- 
2.34.1