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llvm-mc/AsmParser: Check for matches with super classes when matching

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instruction operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78565 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2009-08-10 16:05:47 +00:00
parent bcf81629b8
commit fdb1f493ab
2 changed files with 52 additions and 2 deletions
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1
test/MC/AsmParser/hello.s
View File

@ -1,5 +1,4 @@
// RUN: llvm-mc -triple i386-unknown-unknown %s -o -
// XFAIL: *
.text
.align 4,0x90

53
utils/TableGen/AsmMatcherEmitter.cpp
View File

@ -876,6 +876,53 @@ static void EmitClassifyOperand(CodeGenTarget &Target,
OS << "}\n\n";
}
/// EmitIsSubclass - Emit the subclass predicate function.
static void EmitIsSubclass(CodeGenTarget &Target,
std::vector<ClassInfo*> &Infos,
raw_ostream &OS) {
OS << "/// IsSubclass - Compute whether \\arg A is a subclass of \\arg B.\n";
OS << "static bool IsSubclass(MatchClassKind A, MatchClassKind B) {\n";
OS << " if (A == B)\n";
OS << " return true;\n\n";
OS << " switch (A) {\n";
OS << " default:\n";
OS << " return false;\n";
for (std::vector<ClassInfo*>::iterator it = Infos.begin(),
ie = Infos.end(); it != ie; ++it) {
ClassInfo &A = **it;
if (A.Kind != ClassInfo::Token) {
std::vector<StringRef> SuperClasses;
for (std::vector<ClassInfo*>::iterator it = Infos.begin(),
ie = Infos.end(); it != ie; ++it) {
ClassInfo &B = **it;
if (&A != &B && A.getRootClass() == B.getRootClass() && A < B)
SuperClasses.push_back(B.Name);
}
if (SuperClasses.empty())
continue;
OS << "\n case " << A.Name << ":\n";
if (SuperClasses.size() == 1) {
OS << " return B == " << SuperClasses.back() << ";\n\n";
continue;
}
OS << " switch (B) {\n";
OS << " default: return false;\n";
for (unsigned i = 0, e = SuperClasses.size(); i != e; ++i)
OS << " case " << SuperClasses[i] << ": return true;\n";
OS << " }\n\n";
}
}
OS << " }\n";
OS << "}\n\n";
}
typedef std::pair<std::string, std::string> StringPair;
/// FindFirstNonCommonLetter - Find the first character in the keys of the
@ -1115,6 +1162,9 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
// Emit the routine to classify an operand.
EmitClassifyOperand(Target, Info.Classes, OS);
// Emit the subclass predicate routine.
EmitIsSubclass(Target, Info.Classes, OS);
// Finally, build the match function.
size_t MaxNumOperands = 0;
@ -1188,7 +1238,8 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
<< "*ie = MatchTable + " << Info.Instructions.size()
<< "; it != ie; ++it) {\n";
for (unsigned i = 0; i != MaxNumOperands; ++i) {
OS << " if (Classes[" << i << "] != it->Classes[" << i << "])\n";
OS << " if (!IsSubclass(Classes["
<< i << "], it->Classes[" << i << "]))\n";
OS << " continue;\n";
}
OS << "\n";