1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
//===- Passes.cpp - Parsing, selection, and running of passes -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file provides the infrastructure to parse and build a custom pass
/// manager based on a commandline flag. It also provides helpers to aid in
/// analyzing, debugging, and testing pass structures.
///
//===----------------------------------------------------------------------===//
#include "Passes.h"
#include "llvm/IR/PassManager.h"
using namespace llvm;
namespace {
/// \brief No-op module pass which does nothing.
struct NoOpModulePass {
PreservedAnalyses run(Module *M) { return PreservedAnalyses::all(); }
};
} // End anonymous namespace.
// FIXME: Factor all of the parsing logic into a .def file that we include
// under different macros.
static bool isModulePassName(StringRef Name) {
if (Name == "no-op-module") return true;
return false;
}
static bool parseModulePassName(ModulePassManager &MPM, StringRef Name) {
assert(isModulePassName(Name));
if (Name == "no-op-module") {
MPM.addPass(NoOpModulePass());
return true;
}
return false;
}
static bool parseModulePassPipeline(ModulePassManager &MPM,
StringRef &PipelineText) {
for (;;) {
// Parse nested pass managers by recursing.
if (PipelineText.startswith("module(")) {
PipelineText = PipelineText.substr(strlen("module("));
if (!parseModulePassPipeline(MPM, PipelineText))
return false;
assert(!PipelineText.empty() && PipelineText[0] == ')');
PipelineText = PipelineText.substr(1);
} else {
// Otherwise try to parse a pass name.
size_t End = PipelineText.find_first_of(",)");
if (!parseModulePassName(MPM, PipelineText.substr(0, End)))
return false;
PipelineText = PipelineText.substr(End);
}
if (PipelineText.empty() || PipelineText[0] == ')')
return true;
assert(PipelineText[0] == ',');
PipelineText = PipelineText.substr(1);
}
}
// Primary pass pipeline description parsing routine.
// FIXME: Should this routine accept a TargetMachine or require the caller to
// pre-populate the analysis managers with target-specific stuff?
bool llvm::parsePassPipeline(ModulePassManager &MPM, StringRef PipelineText) {
// Look at the first entry to figure out which layer to start parsing at.
if (PipelineText.startswith("module("))
return parseModulePassPipeline(MPM, PipelineText);
// FIXME: Support parsing function pass manager nests.
// This isn't a direct pass manager name, look for the end of a pass name.
StringRef FirstName = PipelineText.substr(0, PipelineText.find_first_of(","));
if (isModulePassName(FirstName))
return parseModulePassPipeline(MPM, PipelineText);
// FIXME: Support parsing function pass names.
return false;
}
|
