From 8b41cba86568a3ee4e6356ca07cf701595cd49b4 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 16 Aug 2004 22:38:02 +0000
Subject: Moved this file out of lib/CodeGen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15837 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Target/SparcV9/MachineCodeForInstruction.cpp | 119 +++++++++++++++++++++++
1 file changed, 119 insertions(+)
create mode 100644 lib/Target/SparcV9/MachineCodeForInstruction.cpp
(limited to 'lib')
diff --git a/lib/Target/SparcV9/MachineCodeForInstruction.cpp b/lib/Target/SparcV9/MachineCodeForInstruction.cpp
new file mode 100644
index 0000000..96cedba
--- /dev/null
+++ b/lib/Target/SparcV9/MachineCodeForInstruction.cpp
@@ -0,0 +1,119 @@
+//===-- MachineCodeForInstruction.cpp -------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Representation of the sequence of machine instructions created for a single
+// VM instruction. Additionally records information about hidden and implicit
+// values used by the machine instructions: about hidden values used by the
+// machine instructions:
+//
+// "Temporary values" are intermediate values used in the machine instruction
+// sequence, but not in the VM instruction. Note that such values should be
+// treated as pure SSA values with no interpretation of their operands (i.e., as
+// a TmpInstruction object which actually represents such a value).
+//
+// (2) "Implicit uses" are values used in the VM instruction but not in the
+// machine instruction sequence
+//
+//===----------------------------------------------------------------------===//
+
+#include "MachineCodeForInstruction.h"
+#include "llvm/Function.h"
+#include "llvm/Instructions.h"
+#include "llvm/Type.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "MachineFunctionInfo.h"
+#include "MachineInstrAnnot.h"
+#include "SparcV9TmpInstr.h"
+using namespace llvm;
+
+MachineCodeForInstruction &MachineCodeForInstruction::get(const Instruction *I){
+ MachineFunction &MF = MachineFunction::get(I->getParent()->getParent());
+ return MF.getInfo()->MCFIEntries[I];
+}
+void MachineCodeForInstruction::destroy(const Instruction *I) {
+ MachineFunction &MF = MachineFunction::get(I->getParent()->getParent());
+ MF.getInfo()->MCFIEntries.erase(I);
+}
+
+void
+MachineCodeForInstruction::dropAllReferences()
+{
+ for (unsigned i=0, N=tempVec.size(); i < N; i++)
+ cast<Instruction>(tempVec[i])->dropAllReferences();
+}
+
+
+MachineCodeForInstruction::~MachineCodeForInstruction() {
+ // Let go of all uses in temp. instructions
+ dropAllReferences();
+
+ // Free the Value objects created to hold intermediate values
+ for (unsigned i=0, N=tempVec.size(); i < N; i++)
+ delete tempVec[i];
+
+ // do not free the MachineInstr objects allocated. they are managed
+ // by the ilist in MachineBasicBlock
+
+ // Free the CallArgsDescriptor if it exists.
+ delete callArgsDesc;
+}
+
+
+CallArgsDescriptor::CallArgsDescriptor(CallInst* _callInstr,
+ TmpInstruction* _retAddrReg,
+ bool _isVarArgs, bool _noPrototype)
+ : callInstr(_callInstr),
+ funcPtr(isa<Function>(_callInstr->getCalledValue())
+ ? NULL : _callInstr->getCalledValue()),
+ retAddrReg(_retAddrReg),
+ isVarArgs(_isVarArgs),
+ noPrototype(_noPrototype) {
+ unsigned int numArgs = callInstr->getNumOperands();
+ argInfoVec.reserve(numArgs);
+ assert(callInstr->getOperand(0) == callInstr->getCalledValue()
+ && "Operand 0 is ignored in the loop below!");
+ for (unsigned int i=1; i < numArgs; ++i)
+ argInfoVec.push_back(CallArgInfo(callInstr->getOperand(i)));
+
+ // Enter this object in the MachineCodeForInstr object of the CallInst.
+ // This transfers ownership of this object.
+ MachineCodeForInstruction::get(callInstr).setCallArgsDescriptor(this);
+}
+
+CallInst *CallArgsDescriptor::getReturnValue() const {
+ return (callInstr->getType() == Type::VoidTy? NULL : callInstr);
+}
+
+// Mechanism to get the descriptor for a CALL MachineInstr.
+// We get the LLVM CallInstr from the ret. addr. register argument
+// of the CALL MachineInstr (which is explicit operand #3 for indirect
+// calls or the last implicit operand for direct calls). We then get
+// the CallArgsDescriptor from the MachineCodeForInstruction object for
+// the CallInstr.
+// This is roundabout but avoids adding a new map or annotation just
+// to keep track of CallArgsDescriptors.
+//
+CallArgsDescriptor *CallArgsDescriptor::get(const MachineInstr* MI) {
+ const TmpInstruction* retAddrReg =
+ cast<TmpInstruction>(isa<Function>(MI->getOperand(0).getVRegValue())
+ ? MI->getImplicitRef(MI->getNumImplicitRefs()-1)
+ : MI->getOperand(2).getVRegValue());
+
+ assert(retAddrReg->getNumOperands() == 1 &&
+ isa<CallInst>(retAddrReg->getOperand(0)) &&
+ "Location of callInstr arg for CALL instr. changed? FIX THIS CODE!");
+
+ const CallInst* callInstr = cast<CallInst>(retAddrReg->getOperand(0));
+
+ CallArgsDescriptor* desc =
+ MachineCodeForInstruction::get(callInstr).getCallArgsDescriptor();
+ assert(desc->getCallInst()==callInstr && "Incorrect call args descriptor?");
+ return desc;
+}
--
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