X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=utils%2FTableGen%2FTGLexer.cpp;h=82d2b6491aaca36ec8bd6659e312214a9eef127c;hb=8b8515c225c799e9df69bde8ffffa3c72cec9445;hp=b444b9ccda0603ea78f38763ae40cf5126e11c01;hpb=d1e1703c39742f3c9fc3d27a442ff59bbdbfb5aa;p=oota-llvm.git

diff --git a/utils/TableGen/TGLexer.cpp b/utils/TableGen/TGLexer.cpp
index b444b9ccda0..82d2b6491aa 100644
--- a/utils/TableGen/TGLexer.cpp
+++ b/utils/TableGen/TGLexer.cpp
@@ -12,10 +12,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "TGLexer.h"
-#include "llvm/ADT/Twine.h"
 #include "llvm/Support/SourceMgr.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Config/config.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/Twine.h"
 #include <cctype>
 #include <cstdio>
 #include <cstdlib>
@@ -96,7 +97,7 @@ tgtok::TokKind TGLexer::LexToken() {
 
   switch (CurChar) {
   default:
-    // Handle letters: [a-zA-Z_]
+    // Handle letters: [a-zA-Z_#]
     if (isalpha(CurChar) || CurChar == '_' || CurChar == '#')
       return LexIdentifier();
       
@@ -215,23 +216,13 @@ tgtok::TokKind TGLexer::LexVarName() {
 
 
 tgtok::TokKind TGLexer::LexIdentifier() {
-  // The first letter is [a-zA-Z_].
+  // The first letter is [a-zA-Z_#].
   const char *IdentStart = TokStart;
   
-  // Match the rest of the identifier regex: [0-9a-zA-Z_]*
-  while (isalpha(*CurPtr) || isdigit(*CurPtr) || *CurPtr == '_'
-         || *CurPtr == '#') {
-    // If this contains a '#', make sure it's value
-    if (*CurPtr == '#') {
-      if (strncmp(CurPtr, "#NAME#", 6) != 0) {
-        return tgtok::Error;
-      }
-      CurPtr += 6;
-    }
-    else {
-      ++CurPtr;
-    }
-  }
+  // Match the rest of the identifier regex: [0-9a-zA-Z_#]*
+  while (isalpha(*CurPtr) || isdigit(*CurPtr) || *CurPtr == '_' ||
+         *CurPtr == '#')
+    ++CurPtr;
   
   
   // Check to see if this identifier is a keyword.
@@ -422,30 +413,30 @@ tgtok::TokKind TGLexer::LexBracket() {
 /// LexExclaim - Lex '!' and '![a-zA-Z]+'.
 tgtok::TokKind TGLexer::LexExclaim() {
   if (!isalpha(*CurPtr))
-    return ReturnError(CurPtr-1, "Invalid \"!operator\"");
+    return ReturnError(CurPtr - 1, "Invalid \"!operator\"");
   
   const char *Start = CurPtr++;
   while (isalpha(*CurPtr))
     ++CurPtr;
   
   // Check to see which operator this is.
-  unsigned Len = CurPtr-Start;
-  
-  if (Len == 3  && !memcmp(Start, "con", 3)) return tgtok::XConcat;
-  if (Len == 3  && !memcmp(Start, "sra", 3)) return tgtok::XSRA;
-  if (Len == 3  && !memcmp(Start, "srl", 3)) return tgtok::XSRL;
-  if (Len == 3  && !memcmp(Start, "shl", 3)) return tgtok::XSHL;
-  if (Len == 2  && !memcmp(Start, "eq", 2)) return tgtok::XEq;
-  if (Len == 9  && !memcmp(Start, "strconcat", 9))   return tgtok::XStrConcat;
-  if (Len == 10 && !memcmp(Start, "nameconcat", 10)) return tgtok::XNameConcat;
-  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;
-  if (Len == 3 && !memcmp(Start, "car", 3)) return tgtok::XCar;
-  if (Len == 3 && !memcmp(Start, "cdr", 3)) return tgtok::XCdr;
-  if (Len == 4 && !memcmp(Start, "null", 4)) return tgtok::XNull;
-  if (Len == 2 && !memcmp(Start, "if", 2)) return tgtok::XIf;
-
-  return ReturnError(Start-1, "Unknown operator");
+  tgtok::TokKind Kind =
+    StringSwitch<tgtok::TokKind>(StringRef(Start, CurPtr - Start))
+    .Case("eq", tgtok::XEq)
+    .Case("if", tgtok::XIf)
+    .Case("head", tgtok::XHead)
+    .Case("tail", tgtok::XTail)
+    .Case("con", tgtok::XConcat)
+    .Case("shl", tgtok::XSHL)
+    .Case("sra", tgtok::XSRA)
+    .Case("srl", tgtok::XSRL)
+    .Case("cast", tgtok::XCast)
+    .Case("empty", tgtok::XEmpty)
+    .Case("subst", tgtok::XSubst)
+    .Case("foreach", tgtok::XForEach)
+    .Case("strconcat", tgtok::XStrConcat)
+    .Default(tgtok::Error);
+
+  return Kind != tgtok::Error ? Kind : ReturnError(Start-1, "Unknown operator");
 }