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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "base/logging.h"
#include "base/stringprintf.h"
#include "compiler_ir.h"
#include "dex/dataflow_iterator-inl.h"
#include "dex_flags.h"
#include "driver/dex_compilation_unit.h"
namespace art {
static const char* storage_name[] = {" Frame ", "PhysReg", " CompilerTemp "};
void MIRGraph::DumpRegLocTable(RegLocation* table, int count) {
for (int i = 0; i < count; i++) {
LOG(INFO) << StringPrintf("Loc[%02d] : %s, %c %c %c %c %c %c 0x%04x S%d",
table[i].orig_sreg, storage_name[table[i].location],
table[i].wide ? 'W' : 'N', table[i].defined ? 'D' : 'U',
table[i].fp ? 'F' : table[i].ref ? 'R' :'C',
table[i].is_const ? 'c' : 'n',
table[i].high_word ? 'H' : 'L', table[i].home ? 'h' : 't',
table[i].reg.GetRawBits(),
table[i].s_reg_low);
}
}
// FIXME - will likely need to revisit all uses of this.
static const RegLocation fresh_loc = {kLocDalvikFrame, 0, 0, 0, 0, 0, 0, 0, 0,
RegStorage(), INVALID_SREG, INVALID_SREG};
void MIRGraph::InitRegLocations() {
// Allocate the location map. We also include the maximum possible temps because
// the temp allocation initializes reg location as well (in order to deal with
// case when it will be called after this pass).
int max_regs = GetNumSSARegs() + GetMaxPossibleCompilerTemps();
RegLocation* loc = arena_->AllocArray<RegLocation>(max_regs, kArenaAllocRegAlloc);
for (int i = 0; i < GetNumSSARegs(); i++) {
loc[i] = fresh_loc;
loc[i].s_reg_low = i;
loc[i].is_const = false; // Constants will be marked by constant propagation pass later.
}
/* Mark the location of ArtMethod* as temporary */
loc[GetMethodSReg()].location = kLocCompilerTemp;
reg_location_ = loc;
}
/*
* Set the s_reg_low field to refer to the pre-SSA name of the
* base Dalvik virtual register. Once we add a better register
* allocator, remove this remapping.
*/
void MIRGraph::RemapRegLocations() {
for (int i = 0; i < GetNumSSARegs(); i++) {
int orig_sreg = reg_location_[i].s_reg_low;
reg_location_[i].orig_sreg = orig_sreg;
reg_location_[i].s_reg_low = SRegToVReg(orig_sreg);
}
}
} // namespace art
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