[mips] Enable the mnemonic spell corrector
This implements suggesting alternative mnemonics when an invalid one is
specified. For example `addru $9, $6, 17767` leads to the following
error message:
error: unknown instruction, did you mean: add, addiu, addu, maddu?
Differential revision: https://reviews.llvm.org/D40646
llvm-svn: 342119
diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index ce7db65..ae70fdd 100644
--- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -6371,6 +6371,9 @@
return false;
}
+static std::string MipsMnemonicSpellCheck(StringRef S, uint64_t FBS,
+ unsigned VariantID = 0);
+
bool MipsAsmParser::ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
SMLoc NameLoc, OperandVector &Operands) {
MCAsmParser &Parser = getParser();
@@ -6381,7 +6384,9 @@
// Check if we have valid mnemonic
if (!mnemonicIsValid(Name, 0)) {
- return Error(NameLoc, "unknown instruction");
+ uint64_t FBS = ComputeAvailableFeatures(getSTI().getFeatureBits());
+ std::string Suggestion = MipsMnemonicSpellCheck(Name, FBS);
+ return Error(NameLoc, "unknown instruction" + Suggestion);
}
// First operand in MCInst is instruction mnemonic.
Operands.push_back(MipsOperand::CreateToken(Name, NameLoc, *this));
@@ -8257,6 +8262,7 @@
#define GET_REGISTER_MATCHER
#define GET_MATCHER_IMPLEMENTATION
+#define GET_MNEMONIC_SPELL_CHECKER
#include "MipsGenAsmMatcher.inc"
bool MipsAsmParser::mnemonicIsValid(StringRef Mnemonic, unsigned VariantID) {