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Simplify the variant handling code, no functionality change. 

llvm-svn: 26023
This commit is contained in:
Chris Lattner 2006-02-06 22:43:28 +00:00
parent 2bf2c8d7e7
commit 033e32e5d9
1 changed files with 17 additions and 34 deletions
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51
llvm/utils/TableGen/AsmWriterEmitter.cpp
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@ -94,7 +94,7 @@ void AsmWriterOperand::EmitCode(std::ostream &OS) const {
///
AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) {
this->CGI = &CGI;
bool inVariant = false; // True if we are inside a {.|.|.} region.
unsigned CurVariant = ~0U; // ~0 if we are outside a {.|.|.} region, other #.
// NOTE: Any extensions to this code need to be mirrored in the
// AsmPrinter::printInlineAsm code that executes as compile time (assuming
@ -109,50 +109,32 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) {
// Emit a constant string fragment.
if (DollarPos != LastEmitted) {
// TODO: this should eventually handle escaping.
AddLiteralString(std::string(AsmString.begin()+LastEmitted,
AsmString.begin()+DollarPos));
if (CurVariant == Variant || CurVariant == ~0U)
AddLiteralString(std::string(AsmString.begin()+LastEmitted,
AsmString.begin()+DollarPos));
LastEmitted = DollarPos;
} else if (AsmString[DollarPos] == '{') {
if (inVariant)
if (CurVariant != ~0U)
throw "Nested variants found for instruction '" +
CGI.TheDef->getName() + "'!";
LastEmitted = DollarPos+1;
inVariant = true; // We are now inside of the variant!
for (unsigned i = 0; i != Variant; ++i) {
// Skip over all of the text for an irrelevant variant here. The
// next variant starts at |, or there may not be text for this
// variant if we see a }.
std::string::size_type NP =
AsmString.find_first_of("|}", LastEmitted);
if (NP == std::string::npos)
throw "Incomplete variant for instruction '" +
CGI.TheDef->getName() + "'!";
LastEmitted = NP+1;
if (AsmString[NP] == '}') {
inVariant = false; // No text for this variant.
break;
}
}
CurVariant = 0; // We are now inside of the variant!
} else if (AsmString[DollarPos] == '|') {
if (!inVariant)
if (CurVariant == ~0U)
throw "'|' character found outside of a variant in instruction '"
+ CGI.TheDef->getName() + "'!";
// Move to the end of variant list.
std::string::size_type NP = AsmString.find('}', LastEmitted);
if (NP == std::string::npos)
throw "Incomplete variant for instruction '" +
CGI.TheDef->getName() + "'!";
LastEmitted = NP+1;
inVariant = false;
++CurVariant;
++LastEmitted;
} else if (AsmString[DollarPos] == '}') {
if (!inVariant)
if (CurVariant == ~0U)
throw "'}' character found outside of a variant in instruction '"
+ CGI.TheDef->getName() + "'!";
LastEmitted = DollarPos+1;
inVariant = false;
++LastEmitted;
CurVariant = ~0U;
} else if (DollarPos+1 != AsmString.size() &&
AsmString[DollarPos+1] == '$') {
AddLiteralString("$"); // "$$" -> $
if (CurVariant == Variant || CurVariant == ~0U)
AddLiteralString("$"); // "$$" -> $
LastEmitted = DollarPos+2;
} else {
// Get the name of the variable.
@ -181,7 +163,7 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) {
throw "Reached end of string before terminating curly brace in '"
+ CGI.TheDef->getName() + "'";
if (AsmString[VarEnd] != '}')
throw "Variant name beginning with '{' did not end with '}' in '"
throw "Variable name beginning with '{' did not end with '}' in '"
+ CGI.TheDef->getName() + "'";
++VarEnd;
}
@ -202,7 +184,8 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) {
--MIOp;
}
Operands.push_back(AsmWriterOperand(OpInfo.PrinterMethodName, MIOp));
if (CurVariant == Variant || CurVariant == ~0U)
Operands.push_back(AsmWriterOperand(OpInfo.PrinterMethodName, MIOp));
LastEmitted = VarEnd;
}
}