1 // Copyright 2019 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef V8_COMPILER_GLOBALS_H_
6 #define V8_COMPILER_GLOBALS_H_
7
8 #include "src/common/globals.h"
9 #include "src/flags/flags.h"
10
11 namespace v8 {
12 namespace internal {
13 namespace compiler {
14
15 // The nci flag is currently used to experiment with feedback collection in
16 // optimized code produced by generic lowering.
17 // Considerations:
18 // - Should we increment the call count? https://crbug.com/v8/10524
19 // - Is feedback already megamorphic in all these cases?
20 //
21 // TODO(jgruber): Remove once we've made a decision whether to collect feedback
22 // unconditionally.
CollectFeedbackInGenericLowering()23 inline bool CollectFeedbackInGenericLowering() {
24 return FLAG_turbo_collect_feedback_in_generic_lowering;
25 }
26
27 enum class StackCheckKind {
28 kJSFunctionEntry = 0,
29 kJSIterationBody,
30 kCodeStubAssembler,
31 kWasm,
32 };
33
34 inline std::ostream& operator<<(std::ostream& os, StackCheckKind kind) {
35 switch (kind) {
36 case StackCheckKind::kJSFunctionEntry:
37 return os << "JSFunctionEntry";
38 case StackCheckKind::kJSIterationBody:
39 return os << "JSIterationBody";
40 case StackCheckKind::kCodeStubAssembler:
41 return os << "CodeStubAssembler";
42 case StackCheckKind::kWasm:
43 return os << "Wasm";
44 }
45 UNREACHABLE();
46 }
47
hash_value(StackCheckKind kind)48 inline size_t hash_value(StackCheckKind kind) {
49 return static_cast<size_t>(kind);
50 }
51
52 // The CallFeedbackRelation states whether the target feedback stored with a
53 // JSCall is related to the call. If, during lowering, a JSCall (e.g. of a
54 // higher order function) is replaced by a JSCall with another target, the
55 // feedback has to be kept but is now unrelated.
56 enum class CallFeedbackRelation { kRelated, kUnrelated };
57
58 inline std::ostream& operator<<(std::ostream& os,
59 CallFeedbackRelation call_feedback_relation) {
60 switch (call_feedback_relation) {
61 case CallFeedbackRelation::kRelated:
62 return os << "CallFeedbackRelation::kRelated";
63 case CallFeedbackRelation::kUnrelated:
64 return os << "CallFeedbackRelation::kUnrelated";
65 }
66 UNREACHABLE();
67 return os;
68 }
69
70 } // namespace compiler
71 } // namespace internal
72 } // namespace v8
73
74 // Support for floating point parameters in calls to C.
75 // It's currently enabled only for the platforms listed below. We don't plan
76 // to add support for IA32, because it has a totally different approach
77 // (using FP stack). As support is added to more platforms, please make sure
78 // to list them here in order to enable tests of this functionality.
79 #if defined(V8_TARGET_ARCH_X64)
80 #define V8_ENABLE_FP_PARAMS_IN_C_LINKAGE
81 #endif
82
83 #endif // V8_COMPILER_GLOBALS_H_
84