Code pulled out of MAchineInstr.(h|cpp)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1660 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
new file mode 100644
index 0000000..3ff3e8c
--- /dev/null
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -0,0 +1,300 @@
+//===-- MachineCodeForMethod.cpp --------------------------------------------=//
+//
+// Purpose:
+// Collect native machine code information for a method.
+// This allows target-specific information about the generated code
+// to be stored with each method.
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineCodeForMethod.h"
+#include "llvm/CodeGen/MachineInstr.h" // For debug output
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/MachineFrameInfo.h"
+#include "llvm/Target/MachineCacheInfo.h"
+#include "llvm/Method.h"
+#include "llvm/iOther.h"
+#include <limits.h>
+
+const int INVALID_FRAME_OFFSET = INT_MAX; // std::numeric_limits<int>::max();
+
+static AnnotationID MCFM_AID(
+ AnnotationManager::getID("CodeGen::MachineCodeForMethod"));
+
+// The next two methods are used to construct and to retrieve
+// the MachineCodeForMethod object for the given method.
+// construct() -- Allocates and initializes for a given method and target
+// get() -- Returns a handle to the object.
+// This should not be called before "construct()"
+// for a given Method.
+//
+MachineCodeForMethod &MachineCodeForMethod::construct(const Method *M,
+ const TargetMachine &Tar){
+ assert(M->getAnnotation(MCFM_AID) == 0 &&
+ "Object already exists for this method!");
+ MachineCodeForMethod* mcInfo = new MachineCodeForMethod(M, Tar);
+ M->addAnnotation(mcInfo);
+ return *mcInfo;
+}
+
+void MachineCodeForMethod::destruct(const Method *M) {
+ bool Deleted = M->deleteAnnotation(MCFM_AID);
+ assert(Deleted && "Machine code did not exist for method!");
+}
+
+
+MachineCodeForMethod &MachineCodeForMethod::get(const Method* method) {
+ MachineCodeForMethod* mc = (MachineCodeForMethod*)
+ method->getAnnotation(MCFM_AID);
+ assert(mc && "Call construct() method first to allocate the object");
+ return *mc;
+}
+
+static unsigned
+ComputeMaxOptionalArgsSize(const TargetMachine& target, const Method* method)
+{
+ const MachineFrameInfo& frameInfo = target.getFrameInfo();
+
+ unsigned int maxSize = 0;
+
+ for (Method::const_inst_iterator I=method->inst_begin(),E=method->inst_end();
+ I != E; ++I)
+ if ((*I)->getOpcode() == Instruction::Call)
+ {
+ CallInst* callInst = cast<CallInst>(*I);
+ unsigned int numOperands = callInst->getNumOperands() - 1;
+ int numExtra = (int) numOperands - frameInfo.getNumFixedOutgoingArgs();
+ if (numExtra <= 0)
+ continue;
+
+ unsigned int sizeForThisCall;
+ if (frameInfo.argsOnStackHaveFixedSize())
+ {
+ int argSize = frameInfo.getSizeOfEachArgOnStack();
+ sizeForThisCall = numExtra * (unsigned) argSize;
+ }
+ else
+ {
+ assert(0 && "UNTESTED CODE: Size per stack argument is not fixed on this architecture: use actual arg sizes to compute MaxOptionalArgsSize");
+ sizeForThisCall = 0;
+ for (unsigned i=0; i < numOperands; ++i)
+ sizeForThisCall += target.findOptimalStorageSize(callInst->
+ getOperand(i)->getType());
+ }
+
+ if (maxSize < sizeForThisCall)
+ maxSize = sizeForThisCall;
+ }
+
+ return maxSize;
+}
+
+// Align data larger than one L1 cache line on L1 cache line boundaries.
+// Align all smaller data on the next higher 2^x boundary (4, 8, ...).
+//
+// THIS FUNCTION HAS BEEN COPIED FROM EMITASSEMBLY.CPP AND
+// SHOULD BE USED DIRECTLY THERE
+//
+inline unsigned int
+SizeToAlignment(unsigned int size, const TargetMachine& target)
+{
+ unsigned short cacheLineSize = target.getCacheInfo().getCacheLineSize(1);
+ if (size > (unsigned) cacheLineSize / 2)
+ return cacheLineSize;
+ else
+ for (unsigned sz=1; /*no condition*/; sz *= 2)
+ if (sz >= size)
+ return sz;
+}
+
+
+
+/*ctor*/
+MachineCodeForMethod::MachineCodeForMethod(const Method* _M,
+ const TargetMachine& target)
+ : Annotation(MCFM_AID),
+ method(_M), compiledAsLeaf(false), staticStackSize(0),
+ automaticVarsSize(0), regSpillsSize(0),
+ currentOptionalArgsSize(0), maxOptionalArgsSize(0),
+ currentTmpValuesSize(0)
+{
+ maxOptionalArgsSize = ComputeMaxOptionalArgsSize(target, method);
+ staticStackSize = maxOptionalArgsSize +
+ target.getFrameInfo().getMinStackFrameSize();
+}
+
+int
+MachineCodeForMethod::allocateLocalVar(const TargetMachine& target,
+ const Value* val,
+ unsigned int size)
+{
+ // Check if we've allocated a stack slot for this value already
+ //
+ int offset = getOffset(val);
+ if (offset == INVALID_FRAME_OFFSET)
+ {
+ bool growUp;
+ int firstOffset =target.getFrameInfo().getFirstAutomaticVarOffset(*this,
+ growUp);
+ unsigned char align;
+ if (size == 0)
+ {
+ size = target.findOptimalStorageSize(val->getType());
+ // align = target.DataLayout.getTypeAlignment(val->getType());
+ }
+
+ align = SizeToAlignment(size, target);
+
+ offset = getAutomaticVarsSize();
+ if (! growUp)
+ offset += size;
+
+ if (unsigned int mod = offset % align)
+ {
+ offset += align - mod;
+ size += align - mod;
+ }
+
+ offset = growUp? firstOffset + offset
+ : firstOffset - offset;
+
+ offsets[val] = offset;
+
+ incrementAutomaticVarsSize(size);
+ }
+ return offset;
+}
+
+int
+MachineCodeForMethod::allocateSpilledValue(const TargetMachine& target,
+ const Type* type)
+{
+ unsigned int size = target.findOptimalStorageSize(type);
+ unsigned char align = target.DataLayout.getTypeAlignment(type);
+
+ bool growUp;
+ int firstOffset = target.getFrameInfo().getRegSpillAreaOffset(*this, growUp);
+
+ int offset = getRegSpillsSize();
+ if (! growUp)
+ offset += size;
+
+ if (unsigned int mod = offset % align)
+ {
+ offset += align - mod;
+ size += align - mod;
+ }
+
+ offset = growUp? firstOffset + offset
+ : firstOffset - offset;
+
+ incrementRegSpillsSize(size);
+
+ return offset;
+}
+
+int
+MachineCodeForMethod::allocateOptionalArg(const TargetMachine& target,
+ const Type* type)
+{
+ const MachineFrameInfo& frameInfo = target.getFrameInfo();
+
+ int size = INT_MAX;
+ if (frameInfo.argsOnStackHaveFixedSize())
+ size = frameInfo.getSizeOfEachArgOnStack();
+ else
+ {
+ size = target.findOptimalStorageSize(type);
+ assert(0 && "UNTESTED CODE: Size per stack argument is not fixed on this architecture: use actual argument sizes for computing optional arg offsets");
+ }
+ unsigned char align = target.DataLayout.getTypeAlignment(type);
+
+ bool growUp;
+ int firstOffset = frameInfo.getFirstOptionalOutgoingArgOffset(*this, growUp);
+
+ int offset = getCurrentOptionalArgsSize();
+ if (! growUp)
+ offset += size;
+
+ if (unsigned int mod = offset % align)
+ {
+ offset += align - mod;
+ size += align - mod;
+ }
+
+ offset = growUp? firstOffset + offset
+ : firstOffset - offset;
+
+ incrementCurrentOptionalArgsSize(size);
+
+ return offset;
+}
+
+void
+MachineCodeForMethod::resetOptionalArgs(const TargetMachine& target)
+{
+ currentOptionalArgsSize = 0;
+}
+
+int
+MachineCodeForMethod::pushTempValue(const TargetMachine& target,
+ unsigned int size)
+{
+ // Compute a power-of-2 alignment according to the possible sizes,
+ // but not greater than the alignment of the largest type we support
+ // (currently a double word -- see class TargetData).
+ unsigned char align = 1;
+ for (; align < size && align < target.DataLayout.getDoubleAlignment();
+ align = 2*align)
+ ;
+
+ bool growUp;
+ int firstTmpOffset = target.getFrameInfo().getTmpAreaOffset(*this, growUp);
+
+ int offset = currentTmpValuesSize;
+ if (! growUp)
+ offset += size;
+
+ if (unsigned int mod = offset % align)
+ {
+ offset += align - mod;
+ size += align - mod;
+ }
+
+ offset = growUp ? firstTmpOffset + offset : firstTmpOffset - offset;
+
+ currentTmpValuesSize += size;
+ return offset;
+}
+
+void
+MachineCodeForMethod::popAllTempValues(const TargetMachine& target)
+{
+ currentTmpValuesSize = 0;
+}
+
+int
+MachineCodeForMethod::getOffset(const Value* val) const
+{
+ std::hash_map<const Value*, int>::const_iterator pair = offsets.find(val);
+ return (pair == offsets.end())? INVALID_FRAME_OFFSET : pair->second;
+}
+
+void
+MachineCodeForMethod::dump() const
+{
+ cerr << "\n" << method->getReturnType()
+ << " \"" << method->getName() << "\"\n";
+
+ for (Method::const_iterator BI = method->begin(); BI != method->end(); ++BI)
+ {
+ BasicBlock* bb = *BI;
+ cerr << "\n"
+ << (bb->hasName()? bb->getName() : "Label")
+ << " (" << bb << ")" << ":\n";
+
+ MachineCodeForBasicBlock& mvec = bb->getMachineInstrVec();
+ for (unsigned i=0; i < mvec.size(); i++)
+ cerr << "\t" << *mvec[i];
+ }
+ cerr << "\nEnd method \"" << method->getName() << "\"\n\n";
+}