From: Chris Lattner Date: Mon, 16 Aug 2004 22:36:54 +0000 (+0000) Subject: Code moved out of lib/CodeGen/MachineFunction.cpp X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2d19f78e970f85abae2368c12c3a8f4af37f07c3;p=oota-llvm.git Code moved out of lib/CodeGen/MachineFunction.cpp git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15835 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/lib/Target/SparcV9/MachineFunctionInfo.cpp b/lib/Target/SparcV9/MachineFunctionInfo.cpp new file mode 100644 index 00000000000..eb66aa00ec2 --- /dev/null +++ b/lib/Target/SparcV9/MachineFunctionInfo.cpp @@ -0,0 +1,180 @@ +//===-- MachineFunctionInfo.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. +// +//===----------------------------------------------------------------------===// +// +// This implements the SparcV9 specific MachineFunctionInfo class. +// +//===----------------------------------------------------------------------===// + +#include "MachineFunctionInfo.h" +#include "llvm/Instructions.h" +#include "llvm/Function.h" +#include "llvm/Type.h" +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/Target/TargetMachine.h" +#include "llvm/Target/TargetFrameInfo.h" +using namespace llvm; + +MachineFunctionInfo *MachineFunction::getInfo() const { + if (!MFInfo) { + MFInfo = new MachineFunctionInfo(*const_cast(this)); + } + return static_cast(MFInfo); +} + + + +static unsigned +ComputeMaxOptionalArgsSize(const TargetMachine& target, const Function *F, + unsigned &maxOptionalNumArgs) +{ + unsigned maxSize = 0; + + for (Function::const_iterator BB = F->begin(), BBE = F->end(); BB !=BBE; ++BB) + for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I) + if (const CallInst *callInst = dyn_cast(I)) + { + unsigned numOperands = callInst->getNumOperands() - 1; + int numExtra = numOperands-6; + if (numExtra <= 0) + continue; + + unsigned sizeForThisCall = numExtra * 8; + + if (maxSize < sizeForThisCall) + maxSize = sizeForThisCall; + + if ((int)maxOptionalNumArgs < numExtra) + maxOptionalNumArgs = (unsigned) numExtra; + } + + 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, ...), +// but not higher than the alignment of the largest type we support +// (currently a double word). -- see class TargetData). +// +// This function is similar to the corresponding function in EmitAssembly.cpp +// but they are unrelated. This one does not align at more than a +// double-word boundary whereas that one might. +// +inline unsigned +SizeToAlignment(unsigned size, const TargetMachine& target) +{ + const unsigned short cacheLineSize = 16; + if (size > (unsigned) cacheLineSize / 2) + return cacheLineSize; + else + for (unsigned sz=1; /*no condition*/; sz *= 2) + if (sz >= size || sz >= target.getTargetData().getDoubleAlignment()) + return sz; +} + + +void MachineFunctionInfo::CalculateArgSize() { + maxOptionalArgsSize = ComputeMaxOptionalArgsSize(MF.getTarget(), + MF.getFunction(), + maxOptionalNumArgs); + staticStackSize = maxOptionalArgsSize + 176; +} + +int +MachineFunctionInfo::computeOffsetforLocalVar(const Value* val, + unsigned &getPaddedSize, + unsigned sizeToUse) +{ + if (sizeToUse == 0) { + // All integer types smaller than ints promote to 4 byte integers. + if (val->getType()->isIntegral() && val->getType()->getPrimitiveSize() < 4) + sizeToUse = 4; + else + sizeToUse = MF.getTarget().getTargetData().getTypeSize(val->getType()); + } + unsigned align = SizeToAlignment(sizeToUse, MF.getTarget()); + + bool growUp; + int firstOffset = MF.getTarget().getFrameInfo()->getFirstAutomaticVarOffset(MF, + growUp); + int offset = growUp? firstOffset + getAutomaticVarsSize() + : firstOffset - (getAutomaticVarsSize() + sizeToUse); + + int aligned = MF.getTarget().getFrameInfo()->adjustAlignment(offset, growUp, align); + getPaddedSize = sizeToUse + abs(aligned - offset); + + return aligned; +} + + +int MachineFunctionInfo::allocateLocalVar(const Value* val, + unsigned sizeToUse) { + assert(! automaticVarsAreaFrozen && + "Size of auto vars area has been used to compute an offset so " + "no more automatic vars should be allocated!"); + + // Check if we've allocated a stack slot for this value already + // + hash_map::const_iterator pair = offsets.find(val); + if (pair != offsets.end()) + return pair->second; + + unsigned getPaddedSize; + unsigned offset = computeOffsetforLocalVar(val, getPaddedSize, sizeToUse); + offsets[val] = offset; + incrementAutomaticVarsSize(getPaddedSize); + return offset; +} + +int +MachineFunctionInfo::allocateSpilledValue(const Type* type) +{ + assert(! spillsAreaFrozen && + "Size of reg spills area has been used to compute an offset so " + "no more register spill slots should be allocated!"); + + unsigned size = MF.getTarget().getTargetData().getTypeSize(type); + unsigned char align = MF.getTarget().getTargetData().getTypeAlignment(type); + + bool growUp; + int firstOffset = MF.getTarget().getFrameInfo()->getRegSpillAreaOffset(MF, growUp); + + int offset = growUp? firstOffset + getRegSpillsSize() + : firstOffset - (getRegSpillsSize() + size); + + int aligned = MF.getTarget().getFrameInfo()->adjustAlignment(offset, growUp, align); + size += abs(aligned - offset); // include alignment padding in size + + incrementRegSpillsSize(size); // update size of reg. spills area + + return aligned; +} + +int +MachineFunctionInfo::pushTempValue(unsigned size) +{ + unsigned align = SizeToAlignment(size, MF.getTarget()); + + bool growUp; + int firstOffset = MF.getTarget().getFrameInfo()->getTmpAreaOffset(MF, growUp); + + int offset = growUp? firstOffset + currentTmpValuesSize + : firstOffset - (currentTmpValuesSize + size); + + int aligned = MF.getTarget().getFrameInfo()->adjustAlignment(offset, growUp, + align); + size += abs(aligned - offset); // include alignment padding in size + + incrementTmpAreaSize(size); // update "current" size of tmp area + + return aligned; +} + +void MachineFunctionInfo::popAllTempValues() { + resetTmpAreaSize(); // clear tmp area to reuse +}