Fix white space matching in latin-1 strings wrt \u00a0.

R=dcarney@chromium.org
BUG=181422

Review URL: https://chromiumcodereview.appspot.com/12644008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13898 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/regexp-macro-assembler-arm.cc

@@ -539,29 +539,23 @@ bool RegExpMacroAssemblerARM::CheckSpecialCharacterClass(uc16 type,
   case 's':
     // Match space-characters
     if (mode_ == ASCII) {
-      // ASCII space characters are '\t'..'\r' and ' '.
+      // One byte space characters are '\t'..'\r', ' ' and \u00a0.
       Label success;
       __ cmp(current_character(), Operand(' '));
       __ b(eq, &success);
       // Check range 0x09..0x0d
       __ sub(r0, current_character(), Operand('\t'));
       __ cmp(r0, Operand('\r' - '\t'));
-      BranchOrBacktrack(hi, on_no_match);
+      __ b(ls, &success);
+      // \u00a0 (NBSP).
+      __ cmp(r0, Operand(0x00a0 - '\t'));
+      BranchOrBacktrack(ne, on_no_match);
       __ bind(&success);
       return true;
     }
     return false;
   case 'S':
-    // Match non-space characters.
-    if (mode_ == ASCII) {
-      // ASCII space characters are '\t'..'\r' and ' '.
-      __ cmp(current_character(), Operand(' '));
-      BranchOrBacktrack(eq, on_no_match);
-      __ sub(r0, current_character(), Operand('\t'));
-      __ cmp(r0, Operand('\r' - '\t'));
-      BranchOrBacktrack(ls, on_no_match);
-      return true;
-    }
+    // The emitted code for generic character classes is good enough.
     return false;
   case 'd':
     // Match ASCII digits ('0'..'9')

src/ia32/regexp-macro-assembler-ia32.cc

@@ -599,29 +599,23 @@ bool RegExpMacroAssemblerIA32::CheckSpecialCharacterClass(uc16 type,
   case 's':
     // Match space-characters
     if (mode_ == ASCII) {
-      // ASCII space characters are '\t'..'\r' and ' '.
+      // One byte space characters are '\t'..'\r', ' ' and \u00a0.
       Label success;
       __ cmp(current_character(), ' ');
-      __ j(equal, &success);
+      __ j(equal, &success, Label::kNear);
       // Check range 0x09..0x0d
       __ lea(eax, Operand(current_character(), -'\t'));
       __ cmp(eax, '\r' - '\t');
-      BranchOrBacktrack(above, on_no_match);
+      __ j(below_equal, &success, Label::kNear);
+      // \u00a0 (NBSP).
+      __ cmp(eax, 0x00a0 - '\t');
+      BranchOrBacktrack(not_equal, on_no_match);
       __ bind(&success);
       return true;
     }
     return false;
   case 'S':
-    // Match non-space characters.
-    if (mode_ == ASCII) {
-      // ASCII space characters are '\t'..'\r' and ' '.
-      __ cmp(current_character(), ' ');
-      BranchOrBacktrack(equal, on_no_match);
-      __ lea(eax, Operand(current_character(), -'\t'));
-      __ cmp(eax, '\r' - '\t');
-      BranchOrBacktrack(below_equal, on_no_match);
-      return true;
-    }
+    // The emitted code for generic character classes is good enough.
     return false;
   case 'd':
     // Match ASCII digits ('0'..'9')

src/x64/regexp-macro-assembler-x64.cc

@@ -640,29 +640,23 @@ bool RegExpMacroAssemblerX64::CheckSpecialCharacterClass(uc16 type,
   case 's':
     // Match space-characters
     if (mode_ == ASCII) {
-      // ASCII space characters are '\t'..'\r' and ' '.
+      // One byte space characters are '\t'..'\r', ' ' and \u00a0.
       Label success;
       __ cmpl(current_character(), Immediate(' '));
-      __ j(equal, &success);
+      __ j(equal, &success, Label::kNear);
       // Check range 0x09..0x0d
       __ lea(rax, Operand(current_character(), -'\t'));
       __ cmpl(rax, Immediate('\r' - '\t'));
-      BranchOrBacktrack(above, on_no_match);
+      __ j(below_equal, &success, Label::kNear);
+      // \u00a0 (NBSP).
+      __ cmpl(rax, Immediate(0x00a0 - '\t'));
+      BranchOrBacktrack(not_equal, on_no_match);
       __ bind(&success);
       return true;
     }
     return false;
   case 'S':
-    // Match non-space characters.
-    if (mode_ == ASCII) {
-      // ASCII space characters are '\t'..'\r' and ' '.
-      __ cmpl(current_character(), Immediate(' '));
-      BranchOrBacktrack(equal, on_no_match);
-      __ lea(rax, Operand(current_character(), -'\t'));
-      __ cmpl(rax, Immediate('\r' - '\t'));
-      BranchOrBacktrack(below_equal, on_no_match);
-      return true;
-    }
+    // The emitted code for generic character classes is good enough.
     return false;
   case 'd':
     // Match ASCII digits ('0'..'9')

test/mjsunit/regress/regress-crbug-181422.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+assertArrayEquals(["\u00a0"], "ab\u00a0cd".match(/\s/));
+assertArrayEquals(["a", "b", "c", "d"], "ab\u00a0cd".match(/\S/g));
+
+assertArrayEquals(["\u00a0"], "\u2604b\u00a0cd".match(/\s/));
+assertArrayEquals(["\u2604", "b", "c", "d"], "\u2604b\u00a0cd".match(/\S/g));