6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-14 00:32:55 +00:00
Code Issues Projects Releases Wiki Activity

Revert AsmWriterEmitter.cpp to 74742. The recent changes are causing serious compile time regression.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77431 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-07-29 05:06:11 +00:00
parent a679207d58
commit 636bef1f35
1 changed files with 21 additions and 213 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

234
utils/TableGen/AsmWriterEmitter.cpp
View File

@ -19,7 +19,6 @@
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include <algorithm>
#include <sstream>
#include <iostream>
using namespace llvm;
@ -33,11 +32,7 @@ static bool isIdentChar(char C) {
// This should be an anon namespace, this works around a GCC warning.
namespace llvm {
struct AsmWriterOperand {
enum OpType {
isLiteralTextOperand,
isMachineInstrOperand,
isLiteralStatementOperand
} OperandType;
enum { isLiteralTextOperand, isMachineInstrOperand } OperandType;
/// Str - For isLiteralTextOperand, this IS the literal text. For
/// isMachineInstrOperand, this is the PrinterMethodName for the operand.
@ -52,16 +47,14 @@ namespace llvm {
std::string MiModifier;
// To make VS STL happy
AsmWriterOperand(OpType op = isLiteralTextOperand):OperandType(op) {}
AsmWriterOperand():OperandType(isLiteralTextOperand) {}
AsmWriterOperand(const std::string &LitStr,
OpType op = isLiteralTextOperand)
: OperandType(op), Str(LitStr) {}
explicit AsmWriterOperand(const std::string &LitStr)
: OperandType(isLiteralTextOperand), Str(LitStr) {}
AsmWriterOperand(const std::string &Printer, unsigned OpNo,
const std::string &Modifier,
OpType op = isMachineInstrOperand)
: OperandType(op), Str(Printer), MIOpNo(OpNo),
const std::string &Modifier)
: OperandType(isMachineInstrOperand), Str(Printer), MIOpNo(OpNo),
MiModifier(Modifier) {}
bool operator!=(const AsmWriterOperand &Other) const {
@ -85,29 +78,6 @@ namespace llvm {
std::vector<AsmWriterOperand> Operands;
const CodeGenInstruction *CGI;
/// MAX_GROUP_NESTING_LEVEL - The maximum number of group nesting
/// levels we ever expect to see in an asm operand.
static const int MAX_GROUP_NESTING_LEVEL = 10;
/// GroupLevel - The level of nesting of the current operand
/// group, such as [reg + (reg + offset)]. -1 means we are not in
/// a group.
int GroupLevel;
/// GroupDelim - Remember the delimeter for a group operand.
char GroupDelim[MAX_GROUP_NESTING_LEVEL];
/// ReadingWhitespace - Tell whether we just read some whitespace.
bool ReadingWhitespace;
/// InGroup - Determine whether we are in the middle of an
/// operand group.
bool InGroup() const { return GroupLevel != -1; }
/// InWhitespace - Determine whether we are in the middle of
/// emitting whitespace.
bool InWhitespace() const { return ReadingWhitespace; }
AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant);
/// MatchesAllButOneOp - If this instruction is exactly identical to the
@ -133,18 +103,6 @@ std::string AsmWriterOperand::getCode() const {
if (OperandType == isLiteralTextOperand)
return "O << \"" + Str + "\"; ";
if (OperandType == isLiteralStatementOperand) {
return Str;
}
if (OperandType == isLiteralStatementOperand) {
return Str;
}
if (OperandType == isLiteralStatementOperand) {
return Str;
}
std::string Result = Str + "(MI";
if (MIOpNo != ~0U)
Result += ", " + utostr(MIOpNo);
@ -157,8 +115,7 @@ std::string AsmWriterOperand::getCode() const {
/// ParseAsmString - Parse the specified Instruction's AsmString into this
/// AsmWriterInst.
///
AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
: GroupLevel(-1), ReadingWhitespace(false) {
AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) {
this->CGI = &CGI;
unsigned CurVariant = ~0U; // ~0 if we are outside a {.|.|.} region, other #.
@ -173,92 +130,15 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
if (DollarPos == std::string::npos) DollarPos = AsmString.size();
// Emit a constant string fragment.
// TODO: Recognize an operand separator to determine when to pad
// to the next operator.
if (DollarPos != LastEmitted) {
if (CurVariant == Variant || CurVariant == ~0U) {
for (; LastEmitted != DollarPos; ++LastEmitted)
switch (AsmString[LastEmitted]) {
case '\n':
assert(!InGroup() && "Missing matching group delimeter");
ReadingWhitespace = false;
AddLiteralString("\\n");
break;
case '\t':
if (!InGroup()) {
ReadingWhitespace = true;
}
AddLiteralString("\\t");
break;
case '"':
if (InWhitespace() && !InGroup())
Operands.push_back(
AsmWriterOperand(
"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
AsmWriterOperand::isLiteralStatementOperand));
ReadingWhitespace = false;
AddLiteralString("\\\"");
break;
case '\\':
if (InWhitespace() && !InGroup())
Operands.push_back(
AsmWriterOperand(
"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
AsmWriterOperand::isLiteralStatementOperand));
ReadingWhitespace = false;
AddLiteralString("\\\\");
break;
case '(': // Fallthrough
case '[':
if (InWhitespace() && !InGroup())
Operands.push_back(
AsmWriterOperand(
"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
AsmWriterOperand::isLiteralStatementOperand));
ReadingWhitespace = false;
++GroupLevel;
assert(GroupLevel < MAX_GROUP_NESTING_LEVEL
&& "Exceeded maximum operand group nesting level");
GroupDelim[GroupLevel] = AsmString[LastEmitted];
AddLiteralString(std::string(1, AsmString[LastEmitted]));
break;
case ')': // Fallthrough
case ']':
if (InWhitespace() && !InGroup())
Operands.push_back(
AsmWriterOperand(
"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
AsmWriterOperand::isLiteralStatementOperand));
ReadingWhitespace = false;
if (AsmString[LastEmitted] == ')')
assert(GroupDelim[GroupLevel] == '(' && "Mismatched delimeters");
else
assert(GroupDelim[GroupLevel] == '[' && "Mismatched delimeters");
--GroupLevel;
assert(GroupLevel > -2 && "Too many end delimeters!");
AddLiteralString(std::string(1, AsmString[LastEmitted]));
break;
case '\n': AddLiteralString("\\n"); break;
case '\t': AddLiteralString("\\t"); break;
case '"': AddLiteralString("\\\""); break;
case '\\': AddLiteralString("\\\\"); break;
default:
if (AsmString[LastEmitted] != ' ' &&
AsmString[LastEmitted] != '\t') {
if (!InGroup() && InWhitespace())
Operands.push_back(
AsmWriterOperand(
"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
AsmWriterOperand::isLiteralStatementOperand));
ReadingWhitespace = false;
}
else
if (!InGroup())
ReadingWhitespace = true;
AddLiteralString(std::string(1, AsmString[LastEmitted]));
break;
}
@ -269,33 +149,11 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
if (DollarPos+1 != AsmString.size() &&
(CurVariant == Variant || CurVariant == ~0U)) {
if (AsmString[DollarPos+1] == 'n') {
assert(!InGroup() && "Missing matching group delimeter");
ReadingWhitespace = false;
AddLiteralString("\\n");
} else if (AsmString[DollarPos+1] == 't') {
if (!InGroup()) {
ReadingWhitespace = true;
}
AddLiteralString("\\t");
} else if (std::string("${|}\\").find(AsmString[DollarPos+1])
!= std::string::npos) {
if (InWhitespace() && !InGroup())
Operands.push_back(
AsmWriterOperand(
"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
AsmWriterOperand::isLiteralStatementOperand));
ReadingWhitespace = false;
if (AsmString[DollarPos+1] == '{') {
++GroupLevel;
assert(GroupLevel < MAX_GROUP_NESTING_LEVEL
&& "Exceeded maximum operand group nesting level");
GroupDelim[GroupLevel] = AsmString[DollarPos+1];
} else if (AsmString[DollarPos+1] == '}') {
assert(GroupDelim[GroupLevel] == '{' && "Mismatched delimeters");
--GroupLevel;
assert(GroupLevel > -2 && "Too many end delimeters!");
}
AddLiteralString(std::string(1, AsmString[DollarPos+1]));
} else {
throw "Non-supported escaped character found in instruction '" +
@ -324,27 +182,13 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
CurVariant = ~0U;
} else if (DollarPos+1 != AsmString.size() &&
AsmString[DollarPos+1] == '$') {
if (CurVariant == Variant || CurVariant == ~0U) {
if (InWhitespace() && !InGroup())
Operands.push_back(
AsmWriterOperand(
"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
AsmWriterOperand::isLiteralStatementOperand));
ReadingWhitespace = false;
if (CurVariant == Variant || CurVariant == ~0U)
AddLiteralString("$"); // "$$" -> $
}
LastEmitted = DollarPos+2;
} else {
if (InWhitespace() && !InGroup())
Operands.push_back(
AsmWriterOperand(
"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
AsmWriterOperand::isLiteralStatementOperand));
ReadingWhitespace = false;
// Get the name of the variable.
std::string::size_type VarEnd = DollarPos+1;
// handle ${foo}bar as $foo by detecting whether the character following
// the dollar sign is a curly brace. If so, advance VarEnd and DollarPos
// so the variable name does not contain the leading curly brace.
@ -416,9 +260,6 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
}
}
Operands.push_back(
AsmWriterOperand("EmitComments(*MI);\n",
AsmWriterOperand::isLiteralStatementOperand));
AddLiteralString("\\n");
}
@ -516,6 +357,7 @@ static void EmitInstructions(std::vector<AsmWriterInst> &Insts,
}
O << "\n";
}
O << " break;\n";
}
@ -543,9 +385,8 @@ FindUniqueOperandCommands(std::vector<std::string> &UniqueOperandCommands,
Command = " " + Inst->Operands[0].getCode() + "\n";
// If this is the last operand, emit a return.
if (Inst->Operands.size() == 1) {
if (Inst->Operands.size() == 1)
Command += " return true;\n";
}
// Check to see if we already have 'Command' in UniqueOperandCommands.
// If not, add it.
@ -590,10 +431,7 @@ FindUniqueOperandCommands(std::vector<std::string> &UniqueOperandCommands,
// Otherwise, scan to see if all of the other instructions in this command
// set share the operand.
bool AllSame = true;
// Keep track of the maximum, number of operands or any
// instruction we see in the group.
size_t MaxSize = FirstInst->Operands.size();
for (NIT = std::find(NIT+1, InstIdxs.end(), CommandIdx);
NIT != InstIdxs.end();
NIT = std::find(NIT+1, InstIdxs.end(), CommandIdx)) {
@ -601,11 +439,6 @@ FindUniqueOperandCommands(std::vector<std::string> &UniqueOperandCommands,
// matches, we're ok, otherwise bail out.
const AsmWriterInst *OtherInst =
getAsmWriterInstByID(NIT-InstIdxs.begin());
if (OtherInst &&
OtherInst->Operands.size() > FirstInst->Operands.size())
MaxSize = std::max(MaxSize, OtherInst->Operands.size());
if (!OtherInst || OtherInst->Operands.size() == Op ||
OtherInst->Operands[Op] != FirstInst->Operands[Op]) {
AllSame = false;
@ -619,12 +452,8 @@ FindUniqueOperandCommands(std::vector<std::string> &UniqueOperandCommands,
std::string Command = " " + FirstInst->Operands[Op].getCode() + "\n";
// If this is the last operand, emit a return after the code.
if (FirstInst->Operands.size() == Op+1 &&
// Don't early-out too soon. Other instructions in this
// group may have more operands.
FirstInst->Operands.size() == MaxSize) {
if (FirstInst->Operands.size() == Op+1)
Command += " return true;\n";
}
UniqueOperandCommands[CommandIdx] += Command;
InstOpsUsed[CommandIdx]++;
@ -738,7 +567,7 @@ void AsmWriterEmitter::run(raw_ostream &O) {
UniqueOperandCommands.push_back(" return true;\n");
isFirst = false;
}
std::vector<unsigned> InstIdxs;
std::vector<unsigned> NumInstOpsHandled;
FindUniqueOperandCommands(UniqueOperandCommands, InstIdxs,
@ -846,28 +675,8 @@ void AsmWriterEmitter::run(raw_ostream &O) {
O << " // Emit the opcode for the instruction.\n"
<< " unsigned Bits = OpInfo[MI->getOpcode()];\n"
<< " if (Bits == 0) return false;\n\n";
O << " unsigned OperandColumn = 1;\n\n"
<< " if (TAI->getOperandColumn(1) > 0) {\n"
<< " // Don't emit trailing whitespace, let the column padding do it. This\n"
<< " // guarantees that a stray long opcode + tab won't upset the alignment.\n"
<< " unsigned OpLength = std::strlen(AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "));\n"
<< " if (OpLength > 0 &&\n"
<< " ((AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[OpLength-1] == ' ' ||\n"
<< " (AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[OpLength-1] == '\\t')) {\n"
<< " do {\n"
<< " --OpLength;\n"
<< " } while ((AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[OpLength-1] == ' ' ||\n"
<< " (AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[OpLength-1] == '\\t');\n"
<< " for (unsigned Idx = 0; Idx < OpLength; ++Idx)\n"
<< " O << (AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[Idx];\n"
<< " O.PadToColumn(TAI->getOperandColumn(OperandColumn++), 1);\n"
<< " }\n"
<< " } else {\n"
<< " O << AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << ");\n"
<< " }\n\n";
<< " if (Bits == 0) return false;\n"
<< " O << AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << ");\n\n";
// Output the table driven operand information.
BitsLeft = 32-AsmStrBits;
@ -932,7 +741,6 @@ void AsmWriterEmitter::run(raw_ostream &O) {
O << " }\n";
O << " return true;\n";
}
O << " return true;\n";
O << "}\n";
}