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generalize my previous operand loc info hack. If the same operand

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is busted for all variants, report it as the location.  This allows
us to get the operand right for bugs like:

t.s:3:12: error: invalid operand for instruction
	outb %al, %gs
	          ^

Even though there are reg/imm and reg/reg forms of this instruction.

llvm-svn: 113183
This commit is contained in:
Chris Lattner 2010-09-06 23:37:39 +00:00
parent 34e366b45c
commit abfe4223c2
1 changed files with 9 additions and 7 deletions
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16
llvm/utils/TableGen/AsmMatcherEmitter.cpp
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@ -1684,7 +1684,6 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
// Emit code to get the available features.
OS << " // Get the current feature set.\n";
OS << " unsigned AvailableFeatures = getAvailableFeatures();\n\n";
OS << " ErrorInfo = 0;\n";
// Emit code to compute the class list for this operand vector.
OS << " // Eliminate obvious mismatches.\n";
@ -1714,7 +1713,11 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
OS << " StringRef Mnemonic = ((" << Target.getName()
<< "Operand*)Operands[0])->getToken();\n\n";
OS << " // Some state to try to produce better error messages.\n";
OS << " bool HadMatchOtherThanFeatures = false;\n\n";
OS << " // Set ErrorInfo to the operand that mismatches if it is \n";
OS << " // wrong for all instances of the instruction.\n";
OS << " ErrorInfo = ~0U;\n";
// Emit code to search the table.
OS << " // Search the table.\n";
@ -1738,12 +1741,12 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
OS << " for (unsigned i = 0; i != " << MaxNumOperands << "; ++i) {\n";
OS << " if (IsSubclass(Classes[i], it->Classes[i]))\n";
OS << " continue;\n";
OS << " // If there is only one instruction with this opcode, report\n";
OS << " // this as an operand error with location info.\n";
OS << " if (MnemonicRange.first+1 == ie) {\n";
OS << " // If this operand is broken for all of the instances of this\n";
OS << " // mnemonic, keep track of it so we can report loc info.\n";
OS << " if (it == MnemonicRange.first || ErrorInfo == i+1)\n";
OS << " ErrorInfo = i+1;\n";
OS << " return Match_InvalidOperand;\n";
OS << " }\n";
OS << " else\n";
OS << " ErrorInfo = ~0U;";
OS << " // Otherwise, just reject this instance of the mnemonic.\n";
OS << " OperandsValid = false;\n";
OS << " break;\n";
@ -1772,7 +1775,6 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
OS << " // Okay, we had no match. Try to return a useful error code.\n";
OS << " if (HadMatchOtherThanFeatures) return Match_MissingFeature;\n";
OS << " ErrorInfo = ~0U;\n";
OS << " return Match_InvalidOperand;\n";
OS << "}\n\n";