1 /*
2 * Copyright (C) 2023 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "berberis/backend/x86_64/code_gen.h"
18
19 #include "berberis/assembler/machine_code.h"
20 #include "berberis/backend/code_emitter.h"
21 #include "berberis/backend/common/machine_ir_opt.h"
22 #include "berberis/backend/common/reg_alloc.h"
23 #include "berberis/backend/x86_64/insn_folding.h"
24 #include "berberis/backend/x86_64/local_guest_context_optimizer.h"
25 #include "berberis/backend/x86_64/loop_guest_context_optimizer.h"
26 #include "berberis/backend/x86_64/machine_ir.h"
27 #include "berberis/backend/x86_64/machine_ir_check.h"
28 #include "berberis/backend/x86_64/machine_ir_opt.h"
29 #include "berberis/backend/x86_64/rename_copy_uses.h"
30 #include "berberis/backend/x86_64/rename_vregs.h"
31 #include "berberis/base/config_globals.h"
32 #include "berberis/base/logging.h"
33 #include "berberis/base/tracing.h"
34
35 namespace berberis::x86_64 {
36
GenCode(MachineIR * machine_ir,MachineCode * machine_code,const GenCodeParams & params)37 void GenCode(MachineIR* machine_ir, MachineCode* machine_code, const GenCodeParams& params) {
38 CHECK_EQ(CheckMachineIR(*machine_ir), kMachineIRCheckSuccess);
39 if (IsConfigFlagSet(kVerboseTranslation)) {
40 TRACE("MachineIR before optimizations {\n");
41 TRACE("%s", machine_ir->GetDebugString().c_str());
42 TRACE("}\n\n");
43 }
44
45 RemoveCriticalEdges(machine_ir);
46
47 ReorderBasicBlocksInReversePostOrder(machine_ir);
48 MoveColdBlocksToEnd(machine_ir);
49
50 RemoveLoopGuestContextAccesses(machine_ir);
51 RenameVRegs(machine_ir);
52
53 RemoveLocalGuestContextAccesses(machine_ir);
54 RemoveRedundantPut(machine_ir);
55 FoldInsns(machine_ir);
56 // Call this after all phases that create copy instructions.
57 RenameCopyUses(machine_ir);
58 RemoveDeadCode(machine_ir);
59
60 AllocRegs(machine_ir);
61
62 RemoveNopPseudoCopy(machine_ir);
63 x86_64::RemoveForwarderBlocks(machine_ir);
64
65 CHECK_EQ(CheckMachineIR(*machine_ir), kMachineIRCheckSuccess);
66
67 if (IsConfigFlagSet(kVerboseTranslation)) {
68 TRACE("MachineIR before emit {\n");
69 TRACE("%s", machine_ir->GetDebugString().c_str());
70 TRACE("}\n\n");
71 }
72
73 if (!params.skip_emit) {
74 CodeEmitter emitter(
75 machine_code, machine_ir->FrameSize(), machine_ir->NumBasicBlocks(), machine_ir->arena());
76 machine_ir->Emit(&emitter);
77 emitter.Finalize();
78 }
79 }
80
81 } // namespace berberis::x86_64
82