summaryrefslogtreecommitdiffstats
path: root/llvm/lib/Target/Sparc/MappingInfo.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'llvm/lib/Target/Sparc/MappingInfo.cpp')
-rw-r--r--llvm/lib/Target/Sparc/MappingInfo.cpp224
1 files changed, 116 insertions, 108 deletions
diff --git a/llvm/lib/Target/Sparc/MappingInfo.cpp b/llvm/lib/Target/Sparc/MappingInfo.cpp
index 9c51bcf9dba..d6910b49939 100644
--- a/llvm/lib/Target/Sparc/MappingInfo.cpp
+++ b/llvm/lib/Target/Sparc/MappingInfo.cpp
@@ -1,9 +1,9 @@
//===- MappingInfo.cpp - create LLVM info and output to .s file ---------===//
//
-// This file contains a FunctionPass called getMappingInfoForFunction,
-// which creates two maps: one between LLVM Instructions and MachineInstrs,
-// and another between MachineBasicBlocks and MachineInstrs (the "BB TO
-// MI MAP").
+// This file contains a FunctionPass called MappingInfo,
+// which creates two maps: one between LLVM Instructions and MachineInstrs
+// (the "LLVM I TO MI MAP"), and another between MachineBasicBlocks and
+// MachineInstrs (the "BB TO MI MAP").
//
// As a side effect, it outputs this information as .byte directives to
// the assembly file. The output is designed to survive the SPARC assembler,
@@ -12,6 +12,27 @@
// dependencies. Currently this question is purely theoretical as the
// Reoptimizer works only on the SPARC.
//
+// The LLVM I TO MI MAP consists of a set of information for each
+// BasicBlock in a Function, ordered from begin() to end(). The information
+// for a BasicBlock consists of
+// 1) its (0-based) index in the Function,
+// 2) the number of LLVM Instructions it contains, and
+// 3) information for each Instruction, in sequence from the begin()
+// to the end() of the BasicBlock. The information for an Instruction
+// consists of
+// 1) its (0-based) index in the BasicBlock,
+// 2) the number of MachineInstrs that correspond to that Instruction
+// (as reported by MachineCodeForInstruction), and
+// 3) the MachineInstr number calculated by create_MI_to_number_Key,
+// for each of the MachineInstrs that correspond to that Instruction.
+//
+// The BB TO MI MAP consists of a three-element tuple for each
+// MachineBasicBlock in a function, ordered from begin() to end() of
+// its MachineFunction: first, the index of the MachineBasicBlock in the
+// function; second, the number of the MachineBasicBlock in the function
+// as computed by create_BB_to_MInumber_Key; and third, the number of
+// MachineInstrs in the MachineBasicBlock.
+//
//===--------------------------------------------------------------------===//
#include "llvm/Reoptimizer/Mapping/MappingInfo.h"
@@ -20,103 +41,69 @@
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineCodeForInstruction.h"
-#include <map>
-using std::vector;
namespace {
- class getMappingInfoForFunction : public FunctionPass {
+ class MappingInfoCollector : public FunctionPass {
std::ostream &Out;
public:
- getMappingInfoForFunction(std::ostream &out) : Out(out){}
- const char* getPassName() const{return "Sparc MappingInformation";}
+ MappingInfoCollector(std::ostream &out) : Out(out){}
+ const char *getPassName () const { return "Instr. Mapping Info Collector"; }
bool runOnFunction(Function &FI);
+ typedef std::map<const MachineInstr*, unsigned> InstructionKey;
private:
- std::map<const Function*, unsigned> Fkey; //key of F to num
- std::map<const MachineInstr*, unsigned> BBkey; //key BB to num
- std::map<const MachineInstr*, unsigned> MIkey; //key MI to num
- void writePrologue(const std::string &comment,
- const std::string &symbolPrefix, unsigned num);
- void writeEpilogue(const std::string &symbolPrefix, unsigned num);
-
+ MappingInfo *currentOutputMap;
+ std::map<Function *, unsigned> Fkey; // Function # for all functions.
bool doInitialization(Module &M);
- void create_BB_to_MInumber_Key(Function &FI);
- void create_MI_to_number_Key(Function &FI);
- void writeBBToMImap(Function &FI, unsigned num);
- void writeLLVMToMImap(Function &FI, unsigned num);
- unsigned writeNumber(unsigned X);
+ void create_BB_to_MInumber_Key(Function &FI, InstructionKey &key);
+ void create_MI_to_number_Key(Function &FI, InstructionKey &key);
+ void buildBBMIMap (Function &FI, MappingInfo &Map);
+ void buildLMIMap (Function &FI, MappingInfo &Map);
+ void writeNumber(unsigned X);
+ void selectOutputMap (MappingInfo &m) { currentOutputMap = &m; }
+ void outByte (unsigned char b) { currentOutputMap->outByte (b); }
};
}
-/// MappingInfoForFunction -- Static factory method: returns a new
-/// getMappingInfoForFunction Pass object, which uses OUT as its
+/// getMappingInfoCollector -- Static factory method: returns a new
+/// MappingInfoCollector Pass object, which uses OUT as its
/// output stream for assembly output.
-Pass *MappingInfoForFunction(std::ostream &out){
- return (new getMappingInfoForFunction(out));
+Pass *getMappingInfoCollector(std::ostream &out){
+ return (new MappingInfoCollector(out));
}
/// runOnFunction -- Builds up the maps for the given function FI and then
/// writes them out as assembly code to the current output stream OUT.
/// This is an entry point to the pass, called by the PassManager.
-bool getMappingInfoForFunction::runOnFunction(Function &FI) {
- // First we build temporary tables used to write out the maps.
- create_BB_to_MInumber_Key(FI);
- create_MI_to_number_Key(FI);
+bool MappingInfoCollector::runOnFunction(Function &FI) {
unsigned num = Fkey[&FI]; // Function number for the current function.
+ // Create objects to hold the maps.
+ MappingInfo LMIMap ("LLVM I TO MI MAP", "LMIMap", num);
+ MappingInfo BBMIMap ("BB TO MI MAP", "BBMIMap", num);
+
+ // Now, build the maps.
+ buildLMIMap (FI, LMIMap);
+ buildBBMIMap (FI, BBMIMap);
+
// Now, write out the maps.
- writeBBToMImap(FI, num);
- writeLLVMToMImap(FI, num);
+ LMIMap.dumpAssembly (Out);
+ BBMIMap.dumpAssembly (Out);
return false;
}
-/// writePrologue -- Output a COMMENT describing the map, then output a
-/// global symbol to start the map named by concatenating SYMBOLPREFIX
-/// and NUM, then output a word containing the length of the map, to the
-/// current output stream Out. This also switches the current section to
-/// .rodata in the assembly output.
-void getMappingInfoForFunction::writePrologue(const std::string &comment,
- const std::string &symbolPrefix,
- unsigned num) {
- // Comment:
- Out << "!" << comment << "\n";
- // Switch sections:
- Out << "\t.section \".rodata\"\n\t.align 8\n";
- // Global symbol naming the map:
- Out << "\t.global " << symbolPrefix << num << "\n";
- Out << "\t.type " << symbolPrefix << num << ",#object\n";
- Out << symbolPrefix << num << ":\n";
- // Length word:
- Out << "\t.word .end_" << symbolPrefix << num << "-"
- << symbolPrefix << num << "\n";
-}
-
-/// writeEpilogue -- Outputs a local symbol to end the map named by
-/// concatenating SYMBOLPREFIX and NUM, followed by a .size directive that
-/// gives the size of the map, to the current output stream Out.
-void getMappingInfoForFunction::writeEpilogue(const std::string &symbolPrefix,
- unsigned num) {
- // Local symbol ending the map:
- Out << ".end_" << symbolPrefix << num << ":\n";
- // Size directive:
- Out << "\t.size " << symbolPrefix << num << ", .end_"
- << symbolPrefix << num << "-" << symbolPrefix
- << num << "\n\n\n\n";
-}
-
/// writeNumber -- Write out the number X as a sequence of .byte
/// directives to the current output stream Out. This method performs a
/// run-length encoding of the unsigned integers X that are output.
-unsigned getMappingInfoForFunction::writeNumber(unsigned X) {
+void MappingInfoCollector::writeNumber(unsigned X) {
unsigned i=0;
do {
unsigned tmp = X & 127;
X >>= 7;
if (X) tmp |= 128;
- Out << "\t.byte " << tmp << "\n";
+ outByte (tmp);
++i;
} while(X);
- return i;
}
/// doInitialization -- Assign a number to each Function, as follows:
@@ -125,14 +112,14 @@ unsigned getMappingInfoForFunction::writeNumber(unsigned X) {
/// inserted into the maps, and are not assigned a number. The side-effect
/// of this method is to fill in Fkey to contain the mapping from Functions
/// to numbers. (This method is called automatically by the PassManager.)
-bool getMappingInfoForFunction::doInitialization(Module &M) {
+bool MappingInfoCollector::doInitialization(Module &M) {
unsigned i = 0;
for (Module::iterator FI = M.begin(), FE = M.end(); FI != FE; ++FI) {
if (FI->isExternal()) continue;
Fkey[FI] = i;
++i;
}
- return false;
+ return false; // Success.
}
/// create_BB_to_MInumber_Key -- Assign a number to each MachineBasicBlock
@@ -140,17 +127,18 @@ bool getMappingInfoForFunction::doInitialization(Module &M) {
/// Function. MachineBasicBlocks are numbered from begin() to end()
/// in the Function's corresponding MachineFunction. Each successive
/// MachineBasicBlock increments the numbering by the number of instructions
-/// it contains. The side-effect of this method is to fill in the instance
-/// variable BBkey with the mapping of MachineBasicBlocks to numbers. BBkey
+/// it contains. The side-effect of this method is to fill in the paramete
+/// KEY with the mapping of MachineBasicBlocks to numbers. KEY
/// is keyed on MachineInstrs, so each MachineBasicBlock is represented
/// therein by its first MachineInstr.
-void getMappingInfoForFunction::create_BB_to_MInumber_Key(Function &FI) {
+void MappingInfoCollector::create_BB_to_MInumber_Key(Function &FI,
+ InstructionKey &key) {
unsigned i = 0;
MachineFunction &MF = MachineFunction::get(&FI);
for (MachineFunction::iterator BI = MF.begin(), BE = MF.end();
BI != BE; ++BI) {
MachineBasicBlock &miBB = *BI;
- BBkey[miBB[0]] = i;
+ key[miBB[0]] = i;
i = i+(miBB.size());
}
}
@@ -160,32 +148,31 @@ void getMappingInfoForFunction::create_BB_to_MInumber_Key(Function &FI) {
/// follows: Numberings start at 0 in each MachineBasicBlock. MachineInstrs
/// are numbered from begin() to end() in their MachineBasicBlock. Each
/// MachineInstr is numbered, then the numbering is incremented by 1. The
-/// side-effect of this method is to fill in the instance variable MIkey
+/// side-effect of this method is to fill in the parameter KEY
/// with the mapping from MachineInstrs to numbers.
-void getMappingInfoForFunction::create_MI_to_number_Key(Function &FI) {
+void MappingInfoCollector::create_MI_to_number_Key(Function &FI,
+ InstructionKey &key) {
MachineFunction &MF = MachineFunction::get(&FI);
for (MachineFunction::iterator BI=MF.begin(), BE=MF.end(); BI != BE; ++BI) {
MachineBasicBlock &miBB = *BI;
unsigned j = 0;
- for(MachineBasicBlock::iterator miI=miBB.begin(), miE=miBB.end();
- miI!=miE; ++miI, ++j) {
- MIkey[*miI]=j;
+ for(MachineBasicBlock::iterator miI = miBB.begin(), miE = miBB.end();
+ miI != miE; ++miI, ++j) {
+ key[*miI] = j;
}
}
}
-/// writeBBToMImap -- Output the BB TO MI MAP for the given function as
-/// assembly code to the current output stream. The BB TO MI MAP consists
-/// of a three-element tuple for each MachineBasicBlock in a function:
-/// first, the index of the MachineBasicBlock in the function; second,
-/// the number of the MachineBasicBlock in the function as computed by
-/// create_BB_to_MInumber_Key; and third, the number of MachineInstrs in
-/// the MachineBasicBlock.
-void getMappingInfoForFunction::writeBBToMImap(Function &FI, unsigned num){
+/// buildBBMIMap -- Build the BB TO MI MAP for the function FI,
+/// and save it into the parameter MAP.
+void MappingInfoCollector::buildBBMIMap(Function &FI, MappingInfo &Map) {
unsigned bb = 0;
- const std::string MapComment = "BB TO MI MAP";
- const std::string MapSymbolPrefix = "BBMIMap";
- writePrologue(MapComment, MapSymbolPrefix, num);
+
+ // First build temporary table used to write out the map.
+ InstructionKey BBkey;
+ create_BB_to_MInumber_Key(FI, BBkey);
+
+ selectOutputMap (Map);
MachineFunction &MF = MachineFunction::get(&FI);
for (MachineFunction::iterator BI = MF.begin(), BE = MF.end();
BI != BE; ++BI, ++bb) {
@@ -194,26 +181,17 @@ void getMappingInfoForFunction::writeBBToMImap(Function &FI, unsigned num){
writeNumber(BBkey[miBB[0]]);
writeNumber(miBB.size());
}
- writeEpilogue(MapSymbolPrefix, num);
}
-/// writeLLVMToMImap -- Output the LLVM I TO MI MAP for the given function
-/// as assembly code to the current output stream. The LLVM I TO MI MAP
-/// consists of a set of information for each BasicBlock in a Function,
-/// ordered from begin() to end(). The information for a BasicBlock consists
-/// of 1) its (0-based) index in the Function, 2) the number of LLVM
-/// Instructions it contains, and 3) information for each Instruction, in
-/// sequence from the begin() to the end() of the BasicBlock. The information
-/// for an Instruction consists of 1) its (0-based) index in the BasicBlock,
-/// 2) the number of MachineInstrs that correspond to that Instruction
-/// (as reported by MachineCodeForInstruction), and 3) the MachineInstr
-/// number calculated by create_MI_to_number_Key, for each of the
-/// MachineInstrs that correspond to that Instruction.
-void getMappingInfoForFunction::writeLLVMToMImap(Function &FI, unsigned num) {
+/// buildLMIMap -- Build the LLVM I TO MI MAP for the function FI,
+/// and save it into the parameter MAP.
+void MappingInfoCollector::buildLMIMap(Function &FI, MappingInfo &Map) {
unsigned bb = 0;
- const std::string MapComment = "LLVM I TO MI MAP";
- const std::string MapSymbolPrefix = "LMIMap";
- writePrologue(MapComment, MapSymbolPrefix, num);
+ // First build temporary table used to write out the map.
+ InstructionKey MIkey;
+ create_MI_to_number_Key(FI, MIkey);
+
+ selectOutputMap (Map);
for (Function::iterator BI = FI.begin(), BE = FI.end();
BI != BE; ++BI, ++bb) {
unsigned li = 0;
@@ -230,5 +208,35 @@ void getMappingInfoForFunction::writeLLVMToMImap(Function &FI, unsigned num) {
}
}
}
- writeEpilogue(MapSymbolPrefix, num);
+}
+
+void MappingInfo::byteVector::dumpAssembly (std::ostream &Out) {
+ for (iterator i = begin (), e = end (); i != e; ++i)
+ Out << ".byte " << (int)*i << "\n";
+}
+
+void MappingInfo::dumpAssembly (std::ostream &Out) {
+ // Prologue:
+ // Output a comment describing the map.
+ Out << "!" << comment << "\n";
+ // Switch the current section to .rodata in the assembly output:
+ Out << "\t.section \".rodata\"\n\t.align 8\n";
+ // Output a global symbol naming the map:
+ Out << "\t.global " << symbolPrefix << functionNumber << "\n";
+ Out << "\t.type " << symbolPrefix << functionNumber << ",#object\n";
+ Out << symbolPrefix << functionNumber << ":\n";
+ // Output a word containing the length of the map:
+ Out << "\t.word .end_" << symbolPrefix << functionNumber << "-"
+ << symbolPrefix << functionNumber << "\n";
+
+ // Output the map data itself:
+ bytes.dumpAssembly (Out);
+
+ // Epilogue:
+ // Output a local symbol marking the end of the map:
+ Out << ".end_" << symbolPrefix << functionNumber << ":\n";
+ // Output size directive giving the size of the map:
+ Out << "\t.size " << symbolPrefix << functionNumber << ", .end_"
+ << symbolPrefix << functionNumber << "-" << symbolPrefix
+ << functionNumber << "\n\n";
}
OpenPOWER on IntegriCloud