better workaround for optimizer bug in GCC >= 4.3 (stable backport)

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/branches/lmms/stable-0.4@2006 0778d3d1-df1d-0410-868b-ea421aaaa00d

ChangeLog

@@ -1,5 +1,22 @@
 2009-02-05	Tobias Doerffel	<tobydox/at/users/dot/sourceforge/dot/net>
 
+	* plugins/ladspa_effect/caps/dsp/Eq.h:
+	better workaround for optimizer bug in GCC >= 4.3
+
+	* plugins/sid/sid_instrument.cpp:
+	* plugins/flp_import/unrtf.cpp:
+	* src/core/track.cpp:
+	added missing header for compilation with GCC 4.4
+
+	* include/pattern.h:
+	* src/tracks/pattern.cpp:
+	cleanups
+
+	* src/core/envelope_and_lfo_parameters.cpp:
+	- simplified formulas for calculating envelope array resulting in about
+	  3x performance with traditional FPU code
+	- loops now can be vectorized by GCC 4.4
+
 	* include/atomic_int.h:
 	* include/audio_port.h:
 	* include/mixer.h:

plugins/ladspa_effect/caps/dsp/Eq.h

@@ -84,14 +84,9 @@ class Eq
 			{
 				for (int z = 0; z < 2; ++z)
 				{
-					// work-around for buggy optimizer in GCC 4.3
-					for (int i = 0; i < Bands-1; ++i)
-						y[z][i] = 0;
-					y[z][Bands-1] = 0;
+					memset( y[z], 0, Bands*sizeof( eq_sample ) );
+					x[z] = 0;
 				}
-
-				for (int i = 0; i < 2; ++i)
-					x[i] = 0;
 			}
 
 		void init (double fs, double Q)