Add a !regmatch operator to do pattern matching in TableGen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73074 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/Record.cpp b/utils/TableGen/Record.cpp
index 45804b9..47cab7b 100644
--- a/utils/TableGen/Record.cpp
+++ b/utils/TableGen/Record.cpp
@@ -16,6 +16,8 @@
#include "llvm/Support/Streams.h"
#include "llvm/ADT/StringExtras.h"
#include <ios>
+#include <sys/types.h>
+#include <regex.h>
using namespace llvm;
@@ -671,6 +673,36 @@
}
break;
}
+ case REGMATCH: {
+ StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
+ StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
+ if (LHSs && RHSs) {
+ regex_t compiled;
+ int err = regcomp (&compiled, LHSs->getValue().c_str(), REG_EXTENDED);
+ if (err != 0) {
+ size_t length = regerror (err, &compiled, NULL, 0);
+ char *buffer = new char[length];
+ (void) regerror (err, &compiled, buffer, length);
+ std::string errmsg = buffer;
+ delete[] buffer;
+ regfree(&compiled);
+ throw errmsg;
+ }
+ int result = regexec(&compiled, RHSs->getValue().c_str(), 0, NULL, 0);
+ if (result == REG_ESPACE) {
+ size_t length = regerror (err, &compiled, NULL, 0);
+ char *buffer = new char[length];
+ (void) regerror (err, &compiled, buffer, length);
+ std::string errmsg = buffer;
+ delete[] buffer;
+ regfree(&compiled);
+ throw errmsg;
+ }
+ regfree(&compiled);
+ return new IntInit(result == 0);
+ }
+ break;
+ }
case SHL:
case SRA:
case SRL: {
@@ -710,6 +742,7 @@
case SRA: Result = "!sra"; break;
case SRL: Result = "!srl"; break;
case STRCONCAT: Result = "!strconcat"; break;
+ case REGMATCH: Result = "!regmatch"; break;
case NAMECONCAT:
Result = "!nameconcat<" + getType()->getAsString() + ">"; break;
}
diff --git a/utils/TableGen/Record.h b/utils/TableGen/Record.h
index 4284cab..3a15ca5 100644
--- a/utils/TableGen/Record.h
+++ b/utils/TableGen/Record.h
@@ -802,7 +802,7 @@
///
class BinOpInit : public OpInit {
public:
- enum BinaryOp { SHL, SRA, SRL, STRCONCAT, CONCAT, NAMECONCAT };
+ enum BinaryOp { SHL, SRA, SRL, STRCONCAT, CONCAT, NAMECONCAT, REGMATCH };
private:
BinaryOp Opc;
Init *LHS, *RHS;
diff --git a/utils/TableGen/TGLexer.cpp b/utils/TableGen/TGLexer.cpp
index 758d499..378bffb 100644
--- a/utils/TableGen/TGLexer.cpp
+++ b/utils/TableGen/TGLexer.cpp
@@ -447,6 +447,7 @@
if (Len == 3 && !memcmp(Start, "shl", 3)) return tgtok::XSHL;
if (Len == 9 && !memcmp(Start, "strconcat", 9)) return tgtok::XStrConcat;
if (Len == 10 && !memcmp(Start, "nameconcat", 10)) return tgtok::XNameConcat;
+ if (Len == 8 && !memcmp(Start, "regmatch", 8)) return tgtok::XRegMatch;
if (Len == 5 && !memcmp(Start, "subst", 5)) return tgtok::XSubst;
if (Len == 7 && !memcmp(Start, "foreach", 7)) return tgtok::XForEach;
if (Len == 4 && !memcmp(Start, "cast", 4)) return tgtok::XCast;
diff --git a/utils/TableGen/TGLexer.h b/utils/TableGen/TGLexer.h
index ac3b984..06f6535 100644
--- a/utils/TableGen/TGLexer.h
+++ b/utils/TableGen/TGLexer.h
@@ -46,7 +46,7 @@
// !keywords.
XConcat, XSRA, XSRL, XSHL, XStrConcat, XNameConcat, XCast, XSubst,
- XForEach, XCar, XCdr, XNull, XIf,
+ XForEach, XCar, XCdr, XNull, XIf, XRegMatch,
// Integer value.
IntVal,
diff --git a/utils/TableGen/TGParser.cpp b/utils/TableGen/TGParser.cpp
index fc6f29f..b4d448b 100644
--- a/utils/TableGen/TGParser.cpp
+++ b/utils/TableGen/TGParser.cpp
@@ -791,6 +791,7 @@
case tgtok::XSRL:
case tgtok::XSHL:
case tgtok::XStrConcat:
+ case tgtok::XRegMatch:
case tgtok::XNameConcat: { // Value ::= !binop '(' Value ',' Value ')'
BinOpInit::BinaryOp Code;
RecTy *Type = 0;
@@ -823,6 +824,11 @@
Code = BinOpInit::STRCONCAT;
Type = new StringRecTy();
break;
+ case tgtok::XRegMatch:
+ Lex.Lex(); // eat the operation
+ Code = BinOpInit::REGMATCH;
+ Type = new IntRecTy();
+ break;
case tgtok::XNameConcat:
Lex.Lex(); // eat the operation
Code = BinOpInit::NAMECONCAT;
@@ -1174,6 +1180,7 @@
case tgtok::XSRL:
case tgtok::XSHL:
case tgtok::XStrConcat:
+ case tgtok::XRegMatch:
case tgtok::XNameConcat: // Value ::= !binop '(' Value ',' Value ')'
case tgtok::XIf:
case tgtok::XForEach: