aboutsummaryrefslogtreecommitdiff
path: root/utils/TableGen/AsmWriterEmitter.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'utils/TableGen/AsmWriterEmitter.cpp')
-rw-r--r--utils/TableGen/AsmWriterEmitter.cpp157
1 files changed, 20 insertions, 137 deletions
diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp
index 069578056c..5f1d325768 100644
--- a/utils/TableGen/AsmWriterEmitter.cpp
+++ b/utils/TableGen/AsmWriterEmitter.cpp
@@ -34,13 +34,19 @@ static bool isIdentChar(char C) {
namespace llvm {
struct AsmWriterOperand {
enum OpType {
+ // Output this text surrounded by quotes to the asm.
isLiteralTextOperand,
+ // This is the name of a routine to call to print the operand.
isMachineInstrOperand,
+ // Output this text verbatim to the asm writer. It is code that
+ // will output some text to the asm.
isLiteralStatementOperand
} OperandType;
/// Str - For isLiteralTextOperand, this IS the literal text. For
- /// isMachineInstrOperand, this is the PrinterMethodName for the operand.
+ /// isMachineInstrOperand, this is the PrinterMethodName for the operand..
+ /// For isLiteralStatementOperand, this is the code to insert verbatim
+ /// into the asm writer.
std::string Str;
/// MiOpNo - For isMachineInstrOperand, this is the operand number of the
@@ -85,29 +91,6 @@ 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
@@ -137,14 +120,6 @@ std::string AsmWriterOperand::getCode() const {
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 +132,7 @@ 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 #.
@@ -181,84 +155,22 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
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");
+ Operands.push_back(
+ // We recognize a tab as an operand delimeter. Either
+ // output column padding if enabled or emit a space.
+ AsmWriterOperand("PadToColumn(OperandColumn++);\n",
+ AsmWriterOperand::isLiteralStatementOperand));
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;
-
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 +181,15 @@ 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");
+ Operands.push_back(
+ // We recognize a tab as an operand delimeter. Either
+ // output column padding if enabled or emit a space.
+ AsmWriterOperand("PadToColumn(OperandColumn++);\n",
+ AsmWriterOperand::isLiteralStatementOperand));
} else if (std::string("${|}\\").find(AsmString[DollarPos+1])
!= std::string::npos) {
- if (InWhitespace() && !InGroup())
- Operands.push_back(
- AsmWriterOperand(
- "O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
- AsmWriterOperand::isLiteralStatementOperand));
- ReadingWhitespace = false;
-
- if (AsmString[DollarPos+1] == '{') {
- ++GroupLevel;
- assert(GroupLevel < MAX_GROUP_NESTING_LEVEL
- && "Exceeded maximum operand group nesting level");
- GroupDelim[GroupLevel] = AsmString[DollarPos+1];
- } else if (AsmString[DollarPos+1] == '}') {
- assert(GroupDelim[GroupLevel] == '{' && "Mismatched delimeters");
- --GroupLevel;
- assert(GroupLevel > -2 && "Too many end delimeters!");
- }
AddLiteralString(std::string(1, AsmString[DollarPos+1]));
} else {
throw "Non-supported escaped character found in instruction '" +
@@ -325,23 +219,10 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
} else if (DollarPos+1 != AsmString.size() &&
AsmString[DollarPos+1] == '$') {
if (CurVariant == Variant || CurVariant == ~0U) {
- if (InWhitespace() && !InGroup())
- Operands.push_back(
- AsmWriterOperand(
- "O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
- AsmWriterOperand::isLiteralStatementOperand));
- ReadingWhitespace = false;
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;
@@ -852,6 +733,8 @@ void AsmWriterEmitter::run(raw_ostream &O) {
<< " 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"
+ << " // We need to handle this special case here because sometimes the initial\n"
+ << " // mnemonic string includes a tab or space and sometimes it doesn't.\n"
<< " unsigned OpLength = std::strlen(AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "));\n"
<< " if (OpLength > 0 &&\n"
<< " ((AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[OpLength-1] == ' ' ||\n"
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-05-09 15:24:48 +0000