* compile.c (case_when_optimizable_literal): When float value can be

  treated as integer, add to table hash of case that way.
  based on a patch from Ikuo KOBORI. [ruby-dev:42038]

* insnf.def (opt_case_dispatch): ditto.

* test/ruby/test_case.rb: add tests.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29203 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 19 insertions, 0 deletions

diff --git a/test/ruby/test_case.rb b/test/ruby/test_case.rb
index 98498dada6..0067b74e2b 100644
--- a/test/ruby/test_case.rb
+++ b/test/ruby/test_case.rb
@@ -84,4 +84,23 @@ class TestCase < Test::Unit::TestCase
       class Fixnum; undef ===; def ===(o); p 42; true; end; end; case 1; when 1; end
     EOS
   end
+
+  def test_optimization
+    case 1
+    when 0.9, 1.1
+      assert(false)
+    when 1.0
+      assert(true)
+    else
+      assert(false)
+    end
+    case 536870912
+    when 536870911.9, 536870912.1
+      assert(false)
+    when 536870912.0
+      assert(true)
+    else
+      assert(false)
+    end
+  end
 end