From 07a73755d365af178050d3945c9c3dcdf2576ea0 Mon Sep 17 00:00:00 2001
From: Nate Begeman <natebegeman@mac.com>
Date: Tue, 17 Aug 2004 07:17:44 +0000
Subject: [PATCH] Re-fix hiding the Frame Pointer from the register allocator
 in functions that have a frame pointer.  This change fixes Burg.  In
 addition, make the necessary changes to floating point code gen and constant
 loading after Chris Lattner's fixes to the asm writer.  These changes fix
 MallocBench/gs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15873 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/PowerPC/PPC32ISelSimple.cpp  | 26 +++++++-------------------
 lib/Target/PowerPC/PPC32RegisterInfo.td |  4 ++--
 lib/Target/PowerPC/PPC64RegisterInfo.td |  4 ++--
 3 files changed, 11 insertions(+), 23 deletions(-)

diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp
index 50fd87b142c..d4d658b58e9 100644
--- a/lib/Target/PowerPC/PPC32ISelSimple.cpp
+++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp
@@ -618,13 +618,14 @@ void ISel::copyConstantToRegister(MachineBasicBlock *MBB,
     unsigned GlobalBase = makeAnotherReg(Type::IntTy);
     unsigned Reg1 = makeAnotherReg(Type::IntTy);
     unsigned Reg2 = makeAnotherReg(Type::IntTy);
+    unsigned Opcode = (Ty == Type::FloatTy) ? PPC::LFS : PPC::LFD;
     // Move value at base + distance into return reg
     copyGlobalBaseToRegister(MBB, IP, GlobalBase);
     BuildMI(*MBB, IP, PPC::LOADHiAddr, 2, Reg1).addReg(GlobalBase)
       .addConstantPoolIndex(CPI);
     BuildMI(*MBB, IP, PPC::LOADLoDirect, 2, Reg2).addReg(Reg1)
       .addConstantPoolIndex(CPI);
-    BuildMI(*MBB, IP, PPC::LFD, 2, R).addSImm(0).addReg(Reg2);
+    BuildMI(*MBB, IP, Opcode, 2, R).addSImm(0).addReg(Reg2);
   } else if (isa<ConstantPointerNull>(C)) {
     // Copy zero (null pointer) to the register.
     BuildMI(*MBB, IP, PPC::LI, 1, R).addSImm(0);
@@ -1824,16 +1825,10 @@ void ISel::emitBinaryFPOperation(MachineBasicBlock *BB,
     const Type *Ty = Op1->getType();
     assert(Ty == Type::FloatTy || Ty == Type::DoubleTy && "Unknown FP type!");
 
-    unsigned Opcode = OpcodeTab[1][OperatorClass];
-    unsigned Op1Reg = getReg(Op1C, BB, IP);
+    unsigned Opcode = OpcodeTab[Ty == Type::DoubleTy][OperatorClass];
     unsigned Op0Reg = getReg(Op0, BB, IP);
-    if (Ty == Type::DoubleTy) {
-      BuildMI(*BB, IP, Opcode, 2, DestReg).addReg(Op0Reg).addReg(Op1Reg);
-    } else {
-      unsigned TmpReg = makeAnotherReg(Type::DoubleTy);
-      BuildMI(*BB, IP, Opcode, 2, TmpReg).addReg(Op0Reg).addReg(Op1Reg);
-      BuildMI(*BB, IP, PPC::FRSP, 1, DestReg).addReg(TmpReg);
-    }
+    unsigned Op1Reg = getReg(Op1C, BB, IP);
+    BuildMI(*BB, IP, Opcode, 2, DestReg).addReg(Op0Reg).addReg(Op1Reg);
     return;
   }
   
@@ -1851,21 +1846,14 @@ void ISel::emitBinaryFPOperation(MachineBasicBlock *BB,
       const Type *Ty = Op0C->getType();
       assert(Ty == Type::FloatTy || Ty == Type::DoubleTy && "Unknown FP type!");
 
-      unsigned Opcode = OpcodeTab[1][OperatorClass];
+      unsigned Opcode = OpcodeTab[Ty == Type::DoubleTy][OperatorClass];
       unsigned Op0Reg = getReg(Op0C, BB, IP);
       unsigned Op1Reg = getReg(Op1, BB, IP);
-      if (Ty == Type::DoubleTy) {
-        BuildMI(*BB, IP, Opcode, 2, DestReg).addReg(Op0Reg).addReg(Op1Reg);
-      } else {
-        unsigned TmpReg = makeAnotherReg(Type::DoubleTy);
-        BuildMI(*BB, IP, Opcode, 2, TmpReg).addReg(Op0Reg).addReg(Op1Reg);
-        BuildMI(*BB, IP, PPC::FRSP, 1, DestReg).addReg(TmpReg);
-      }
+      BuildMI(*BB, IP, Opcode, 2, DestReg).addReg(Op0Reg).addReg(Op1Reg);
       return;
     }
 
   unsigned Opcode = OpcodeTab[Op0->getType() != Type::FloatTy][OperatorClass];
-  //unsigned Opcode = OpcodeTab[OperatorClass];
   unsigned Op0r = getReg(Op0, BB, IP);
   unsigned Op1r = getReg(Op1, BB, IP);
   BuildMI(*BB, IP, Opcode, 2, DestReg).addReg(Op0r).addReg(Op1r);
diff --git a/lib/Target/PowerPC/PPC32RegisterInfo.td b/lib/Target/PowerPC/PPC32RegisterInfo.td
index 364b1d91d3f..2f80c014375 100644
--- a/lib/Target/PowerPC/PPC32RegisterInfo.td
+++ b/lib/Target/PowerPC/PPC32RegisterInfo.td
@@ -17,8 +17,8 @@ include "PowerPCRegisterInfo.td"
 // then nonvolatiles in reverse order since stmw/lmw save from rN to r31
 def GPRC : RegisterClass<i32, 8,
      [R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12,
-      R31, R30, R29, R28, R27, R26, R25, R24, R23, R22, R21, R20, R19, R18, R17,
-      R16, R15, R14, R13, R0, R1, LR]>
+      R30, R29, R28, R27, R26, R25, R24, R23, R22, R21, R20, R19, R18, R17,
+      R16, R15, R14, R13, R31, R0, R1, LR]>
 {
   let Methods = [{
     iterator allocation_order_begin(MachineFunction &MF) const {
diff --git a/lib/Target/PowerPC/PPC64RegisterInfo.td b/lib/Target/PowerPC/PPC64RegisterInfo.td
index f39ef1cbff5..b922676cc55 100644
--- a/lib/Target/PowerPC/PPC64RegisterInfo.td
+++ b/lib/Target/PowerPC/PPC64RegisterInfo.td
@@ -17,8 +17,8 @@ include "PowerPCRegisterInfo.td"
 // then nonvolatiles in reverse order since stmw/lmw save from rN to r31
 def GPRC : RegisterClass<i64, 8,
      [R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12,
-      R31, R30, R29, R28, R27, R26, R25, R24, R23, R22, R21, R20, R19, R18, R17,
-      R16, R15, R14, R13, R0, R1, LR]>
+      R30, R29, R28, R27, R26, R25, R24, R23, R22, R21, R20, R19, R18, R17,
+      R16, R15, R14, R13, R31, R0, R1, LR]>
 {
   let Methods = [{
     iterator allocation_order_begin(MachineFunction &MF) const {
-- 
2.11.0