[pypy-commit] pypy virtual-raw-mallocs: use ldexp instead of pow, to make sure that the raw_malloc optimization works also with integers type. Failing so far

[antocuni]

Author: Antonio Cuni <anto.cuni at gmail.com>
Branch: virtual-raw-mallocs
Changeset: r59527:804ffa6e4a14
Date: 2012-12-20 17:51 +0100
http://bitbucket.org/pypy/pypy/changeset/804ffa6e4a14/

Log:	use ldexp instead of pow, to make sure that the raw_malloc
	optimization works also with integers type. Failing so far

diff --git a/pypy/module/pypyjit/test_pypy_c/test_ffi.py b/pypy/module/pypyjit/test_pypy_c/test_ffi.py
--- a/pypy/module/pypyjit/test_pypy_c/test_ffi.py
+++ b/pypy/module/pypyjit/test_pypy_c/test_ffi.py
@@ -182,28 +182,29 @@
 
             libm = _cffi_backend.load_library(libm_name)
             BDouble = _cffi_backend.new_primitive_type("double")
-            BPow = _cffi_backend.new_function_type([BDouble, BDouble], BDouble)
-            pow = libm.load_function(BPow, 'pow')
+            BInt = _cffi_backend.new_primitive_type("int")
+            BPow = _cffi_backend.new_function_type([BDouble, BInt], BDouble)
+            ldexp = libm.load_function(BPow, 'ldexp')
             i = 0
             res = 0
             while i < 300:
-                tmp = pow(2, 3)   # ID: cfficall
+                tmp = ldexp(1, 3)   # ID: cfficall
                 res += tmp
                 i += 1
             BLong = _cffi_backend.new_primitive_type("long")
-            pow_addr = int(_cffi_backend.cast(BLong, pow))
-            return pow_addr, res
+            ldexp_addr = int(_cffi_backend.cast(BLong, ldexp))
+            return ldexp_addr, res
         #
         libm_name = get_libm_name(sys.platform)
         log = self.run(main, [libm_name])
-        pow_addr, res = log.result
+        ldexp_addr, res = log.result
         assert res == 8.0 * 300
         loop, = log.loops_by_filename(self.filepath)
-        if 'ConstClass(pow)' in repr(loop):   # e.g. OS/X
-            pow_addr = 'ConstClass(pow)'
+        if 'ConstClass(ldexp)' in repr(loop):   # e.g. OS/X
+            ldexp_addr = 'ConstClass(ldexp)'
         assert loop.match_by_id('cfficall', """
             ...
-            f1 = call_release_gil(..., descr=<Callf 8 ff EF=6 OS=62>)
+            f1 = call_release_gil(..., descr=<Callf 8 fi EF=6 OS=62>)
             ...
         """)
         ops = loop.ops_by_id('cfficall')
@@ -214,4 +215,3 @@
         # so far just check that call_release_gil() is produced.
         # later, also check that the arguments to call_release_gil()
         # are constants
-