Classic JIT is still being supported by MIPS, along with MCJIT.

This change adds endian-awareness to MipsJITInfo and emitWordLE in
MipsCodeEmitter has become emitWord now to support both endianness.

Patch by Petar Jovanovic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169177 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/MipsCodeEmitter.cpp b/lib/Target/Mips/MipsCodeEmitter.cpp
index 6c0eb159dce6f41dfa056de6e4077e942d483f66..2942716dc20b231c927e3df6070a982c72c38030 100644 (file)
--- a/lib/Target/Mips/MipsCodeEmitter.cpp
+++ b/lib/Target/Mips/MipsCodeEmitter.cpp
@@ -85,7 +85,7 @@ class MipsCodeEmitter : public MachineFunctionPass {
 
   private:
 
-    void emitWordLE(unsigned Word);
+    void emitWord(unsigned Word);
 
     /// Routines that handle operands which add machine relocations which are
     /// fixed up by the relocation stage.
@@ -127,7 +127,7 @@ bool MipsCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
   MCPEs = &MF.getConstantPool()->getConstants();
   MJTEs = 0;
   if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
-  JTI->Initialize(MF, IsPIC);
+  JTI->Initialize(MF, IsPIC, Subtarget->isLittle());
   MCE.setModuleInfo(&getAnalysis<MachineModuleInfo> ());
 
   do {
@@ -274,16 +274,19 @@ void MipsCodeEmitter::emitInstruction(const MachineInstr &MI) {
   if ((MI.getDesc().TSFlags & MipsII::FormMask) == MipsII::Pseudo)
     return;
 
-  emitWordLE(getBinaryCodeForInstr(MI));
+  emitWord(getBinaryCodeForInstr(MI));
   ++NumEmitted;  // Keep track of the # of mi's emitted
 
   MCE.processDebugLoc(MI.getDebugLoc(), false);
 }
 
-void MipsCodeEmitter::emitWordLE(unsigned Word) {
+void MipsCodeEmitter::emitWord(unsigned Word) {
   DEBUG(errs() << "  0x";
         errs().write_hex(Word) << "\n");
-  MCE.emitWordLE(Word);
+  if (Subtarget->isLittle())
+    MCE.emitWordLE(Word);
+  else
+    MCE.emitWordBE(Word);
 }
 
 /// createMipsJITCodeEmitterPass - Return a pass that emits the collected Mips

diff --git a/lib/Target/Mips/MipsJITInfo.cpp b/lib/Target/Mips/MipsJITInfo.cpp
index cd910bb02a784ff3a1b8d5fecaabd8f9d8e9838e..5fd600ebc90486d3e52e2c769e89a0eab6d36fa5 100644 (file)
--- a/lib/Target/Mips/MipsJITInfo.cpp
+++ b/lib/Target/Mips/MipsJITInfo.cpp
@@ -222,10 +222,17 @@ void *MipsJITInfo::emitFunctionStub(const Function *F, void *Fn,
   // addiu t9, t9, %lo(EmittedAddr)
   // jalr t8, t9
   // nop
-  JCE.emitWordLE(0xf << 26 | 25 << 16 | Hi);
-  JCE.emitWordLE(9 << 26 | 25 << 21 | 25 << 16 | Lo);
-  JCE.emitWordLE(25 << 21 | 24 << 11 | 9);
-  JCE.emitWordLE(0);
+  if (IsLittleEndian) {
+    JCE.emitWordLE(0xf << 26 | 25 << 16 | Hi);
+    JCE.emitWordLE(9 << 26 | 25 << 21 | 25 << 16 | Lo);
+    JCE.emitWordLE(25 << 21 | 24 << 11 | 9);
+    JCE.emitWordLE(0);
+  } else {
+    JCE.emitWordBE(0xf << 26 | 25 << 16 | Hi);
+    JCE.emitWordBE(9 << 26 | 25 << 21 | 25 << 16 | Lo);
+    JCE.emitWordBE(25 << 21 | 24 << 11 | 9);
+    JCE.emitWordBE(0);
+  }
 
   sys::Memory::InvalidateInstructionCache(Addr, 16);
   if (!sys::Memory::setRangeExecutable(Addr, 16))

diff --git a/lib/Target/Mips/MipsJITInfo.h b/lib/Target/Mips/MipsJITInfo.h
index 637a31866034a349639da5d66f2af4faab9f5071..ecda3101a0031b668731414b7e258b0a541b45cc 100644 (file)
--- a/lib/Target/Mips/MipsJITInfo.h
+++ b/lib/Target/Mips/MipsJITInfo.h
@@ -26,10 +26,11 @@ class MipsTargetMachine;
 class MipsJITInfo : public TargetJITInfo {
 
   bool IsPIC;
+  bool IsLittleEndian;
 
   public:
     explicit MipsJITInfo() :
-      IsPIC(false) {}
+      IsPIC(false), IsLittleEndian(true) {}
 
     /// replaceMachineCodeForFunction - Make it so that calling the function
     /// whose machine code is at OLD turns into a call to NEW, perhaps by
@@ -58,8 +59,10 @@ class MipsJITInfo : public TargetJITInfo {
                           unsigned NumRelocs, unsigned char *GOTBase);
 
     /// Initialize - Initialize internal stage for the function being JITted.
-    void Initialize(const MachineFunction &MF, bool isPIC) {
+    void Initialize(const MachineFunction &MF, bool isPIC,
+                    bool isLittleEndian) {
       IsPIC = isPIC;
+      IsLittleEndian = isLittleEndian;
     }
 
 };