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Add a !patsubst operator. Use on string types.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73099 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Greene 2009-06-08 23:05:37 +00:00
parent 2e7ccfce98
commit 0d973999f3
8 changed files with 97 additions and 3 deletions
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4
docs/TableGenFundamentals.html
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@ -417,6 +417,10 @@ aborts with an error. </dd>
<dt><tt>!subst(a, b, c)</tt></dt>
<dd>If 'a' and 'b' are of string type or are symbol references, substitute
'b' for 'a' in 'c.' This operation is analogous to $(subst) in GNU make.</dd>
<dt><tt>!patsubst(a, b, c)</tt></dt>
<dd>patch regular expression 'a' against string 'c' and substitute string 'b' on
a match. 'b' may contain placeholders of the form $&lt;digit&gt;, where
&lt;digit&gt; is a number 1-9.</dd>
<dt><tt>!regmatch(a, b)</tt></dt>
<dd>An integer {0,1} indicating whether string 'b' matched regular expression
'a.'</dd>

15
test/TableGen/patsubst.td Normal file
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@ -0,0 +1,15 @@
// RUN: tblgen %s | grep {Match1 = "v4f32"} | count 1
// RUN: tblgen %s | grep {Match2 = "v2f64"} | count 1
// RUN: tblgen %s | grep {Match3 = "v4f32 add"} | count 1
// RUN: tblgen %s | grep {Match4 = "v2f64 add"} | count 1
class Foo<string v> {
string Value = v;
string Match1 = !patsubst(".*ps$", "v4f32", v);
string Match2 = !patsubst(".*pd$", "v2f64", v);
string Match3 = !patsubst("(.*)ps$", "v4f32 $1", v);
string Match4 = !patsubst("(.*)pd$", "v2f64 $1", v);
}
def Bar : Foo<"addps">;
def Baz : Foo<"addpd">;

2
utils/TableGen/CodeGenDAGPatterns.cpp
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@ -2025,7 +2025,7 @@ void CodeGenDAGPatterns::ParsePatterns() {
}
}
else {
ListTy - TArg->getType();
ListTy = TArg->getType();
}
}
ListInit *LI = new ListInit(Values, new ListRecTy(ListTy));

65
utils/TableGen/Record.cpp
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@ -18,6 +18,7 @@
#include <ios>
#include <sys/types.h>
#include <regex.h>
#include <sstream>
using namespace llvm;
@ -1034,6 +1035,69 @@ Init *TernOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
}
break;
}
case PATSUBST: {
StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
StringInit *MHSs = dynamic_cast<StringInit*>(MHS);
StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
if (LHSs && MHSs && 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;
}
regmatch_t matches[10];
int result = regexec(&compiled, RHSs->getValue().c_str(), 10, matches, 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);
if (result == 0) {
// Parse the substitution string looking for $1, $2, etc. and
// substitute strings. If there are no $1, etc. just replace
// the whole string.
std::string replacement = MHSs->getValue();
size_t pos = replacement.find("$");
while (pos != std::string::npos && pos+1 < replacement.size()) {
if (std::isdigit(replacement[pos+1])) {
std::string sidx(&replacement[pos+1], 1);
std::istringstream str(sidx);
int idx;
if (str >> idx) {
replacement.replace(pos, 2, RHSs->getValue(), matches[idx].rm_so,
matches[idx].rm_eo - matches[idx].rm_so);
}
else {
throw "unexpected failure in patsubst index calculation";
}
}
else if (replacement[pos+1] == '$') {
replacement.replace(pos, 2, "$");
}
pos = replacement.find("$", pos+1);
}
return new StringInit(replacement);
}
else {
// No match, just pass the string through
return RHSs;
}
}
break;
}
}
return this;
@ -1069,6 +1133,7 @@ std::string TernOpInit::getAsString() const {
std::string Result;
switch (Opc) {
case SUBST: Result = "!subst"; break;
case PATSUBST: Result = "!patsubst"; break;
case FOREACH: Result = "!foreach"; break;
case IF: Result = "!if"; break;
}

2
utils/TableGen/Record.h
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@ -885,7 +885,7 @@ public:
///
class TernOpInit : public OpInit {
public:
enum TernaryOp { SUBST, FOREACH, IF };
enum TernaryOp { SUBST, FOREACH, IF, PATSUBST };
private:
TernaryOp Opc;
Init *LHS, *MHS, *RHS;

1
utils/TableGen/TGLexer.cpp
View File

@ -449,6 +449,7 @@ tgtok::TokKind TGLexer::LexExclaim() {
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 == 8 && !memcmp(Start, "patsubst", 8)) return tgtok::XPatSubst;
if (Len == 7 && !memcmp(Start, "foreach", 7)) return tgtok::XForEach;
if (Len == 4 && !memcmp(Start, "cast", 4)) return tgtok::XCast;
if (Len == 3 && !memcmp(Start, "car", 3)) return tgtok::XCar;

2
utils/TableGen/TGLexer.h
View File

@ -46,7 +46,7 @@ namespace tgtok {
// !keywords.
XConcat, XSRA, XSRL, XSHL, XStrConcat, XNameConcat, XCast, XSubst,
XForEach, XCar, XCdr, XNull, XIf, XRegMatch,
XForEach, XCar, XCdr, XNull, XIf, XRegMatch, XPatSubst,
// Integer value.
IntVal,

9
utils/TableGen/TGParser.cpp
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@ -878,6 +878,7 @@ Init *TGParser::ParseOperation(Record *CurRec) {
case tgtok::XIf:
case tgtok::XForEach:
case tgtok::XPatSubst:
case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
TernOpInit::TernaryOp Code;
RecTy *Type = 0;
@ -896,6 +897,9 @@ Init *TGParser::ParseOperation(Record *CurRec) {
case tgtok::XSubst:
Code = TernOpInit::SUBST;
break;
case tgtok::XPatSubst:
Code = TernOpInit::PATSUBST;
break;
}
if (Lex.getCode() != tgtok::l_paren) {
TokError("expected '(' after ternary operator");
@ -969,6 +973,10 @@ Init *TGParser::ParseOperation(Record *CurRec) {
Type = RHSt->getType();
break;
}
case tgtok::XPatSubst: {
Type = new StringRecTy;
break;
}
}
return (new TernOpInit(Code, LHS, MHS, RHS, Type))->Fold(CurRec, CurMultiClass);
}
@ -1277,6 +1285,7 @@ Init *TGParser::ParseSimpleValue(Record *CurRec, RecTy *ItemType) {
case tgtok::XNameConcat: // Value ::= !binop '(' Value ',' Value ')'
case tgtok::XIf:
case tgtok::XForEach:
case tgtok::XPatSubst:
case tgtok::XSubst: { // Value ::= !ternop '(' Value ',' Value ',' Value ')'
return ParseOperation(CurRec);
break;