[commit: testsuite] master: Add testcase for #8598 (7e5c115)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/testsuite

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/7e5c115b88f0bae2e70f5d3fb7512c12a0f5744a/testsuite

>---------------------------------------------------------------

commit 7e5c115b88f0bae2e70f5d3fb7512c12a0f5744a
Author: Joachim Breitner <mail at joachim-breitner.de>
Date:   Mon Dec 9 10:14:00 2013 +0000

    Add testcase for #8598


>---------------------------------------------------------------

7e5c115b88f0bae2e70f5d3fb7512c12a0f5744a
 tests/stranal/sigs/T8598.hs |   20 ++++++++++++++++++++
 tests/stranal/sigs/all.T    |    1 +
 2 files changed, 21 insertions(+)

diff --git a/tests/stranal/sigs/T8598.hs b/tests/stranal/sigs/T8598.hs
new file mode 100644
index 0000000..55c1a35
--- /dev/null
+++ b/tests/stranal/sigs/T8598.hs
@@ -0,0 +1,20 @@
+{-# OPTIONS_GHC -fplugin StrAnalAnnotation #-}
+{-# LANGUAGE  MagicHash , UnboxedTuples #-}
+
+module T8598(fun) where
+
+import GHC.Float (Double(..))
+import GHC.Integer (decodeDoubleInteger, encodeDoubleInteger)
+import StrAnalAnnotation (StrAnal(StrAnal))
+
+-- Float.scaleFloat for Doubles, slightly simplified
+fun :: Double -> Double
+fun x | isFix           = x
+      | otherwise       = case x of
+          (D# x#) -> case decodeDoubleInteger x# of
+            (# i, j #) -> D# (encodeDoubleInteger i j)
+  where
+  isFix = isDoubleFinite x == 0
+{-# ANN fun (StrAnal "<S(S),1*U(U)>m") #-}
+
+foreign import ccall unsafe "isDoubleFinite" isDoubleFinite :: Double -> Int
diff --git a/tests/stranal/sigs/all.T b/tests/stranal/sigs/all.T
index 4080eb9..aee2ab3 100644
--- a/tests/stranal/sigs/all.T
+++ b/tests/stranal/sigs/all.T
@@ -18,4 +18,5 @@ test('StrAnalExample', normal, compile, ['--make -package ghc -v0 ' + config.ghc
 
 test('T8569', expect_broken(8569), compile, ['--make -package ghc -v0 ' + config.ghc_th_way_flags])
 test('HyperStrUse', normal, compile, ['--make -package ghc -v0 ' + config.ghc_th_way_flags])
+test('T8598', expect_broken(8598), compile, ['--make -package ghc -v0 ' + config.ghc_th_way_flags])