Cycles: Ignore -Wmaybe-uninitialized from the kernel in release builds

This warning provided too much false-positive issues in release version of the
kernel, making it really easy to miss actual warnings.

intern/cycles/kernel/kernel.cpp

@@ -16,8 +16,8 @@
 
 /* CPU kernel entry points */
 
-#include "kernel.h"
 #include "kernel_compat_cpu.h"
+#include "kernel.h"
 #include "kernel_math.h"
 #include "kernel_types.h"
 #include "kernel_globals.h"

intern/cycles/kernel/kernel_avx.cpp

@@ -31,8 +31,8 @@
  
 #ifdef WITH_CYCLES_OPTIMIZED_KERNEL_AVX
 
-#include "kernel.h"
 #include "kernel_compat_cpu.h"
+#include "kernel.h"
 #include "kernel_math.h"
 #include "kernel_types.h"
 #include "kernel_globals.h"

intern/cycles/kernel/kernel_avx2.cpp

@@ -32,8 +32,8 @@
  
 #ifdef WITH_CYCLES_OPTIMIZED_KERNEL_AVX2
 
-#include "kernel.h"
 #include "kernel_compat_cpu.h"
+#include "kernel.h"
 #include "kernel_math.h"
 #include "kernel_types.h"
 #include "kernel_globals.h"

intern/cycles/kernel/kernel_compat_cpu.h

@@ -19,6 +19,13 @@
 
 #define __KERNEL_CPU__
 
+/* Release kernel has too much false-positive maybe-uninitialzied warnings,
+ * which makes it possible to miss actual warnings.
+ */
+#if defined(__GNUC__) && defined(NDEBUG)
+#  pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
+
 #include "util_debug.h"
 #include "util_math.h"
 #include "util_simd.h"

intern/cycles/kernel/kernel_sse2.cpp

@@ -27,8 +27,8 @@
 
 #ifdef WITH_CYCLES_OPTIMIZED_KERNEL_SSE2
 
-#include "kernel.h"
 #include "kernel_compat_cpu.h"
+#include "kernel.h"
 #include "kernel_math.h"
 #include "kernel_types.h"
 #include "kernel_globals.h"

intern/cycles/kernel/kernel_sse3.cpp

@@ -29,8 +29,8 @@
 
 #ifdef WITH_CYCLES_OPTIMIZED_KERNEL_SSE3
 
-#include "kernel.h"
 #include "kernel_compat_cpu.h"
+#include "kernel.h"
 #include "kernel_math.h"
 #include "kernel_types.h"
 #include "kernel_globals.h"

intern/cycles/kernel/kernel_sse41.cpp

@@ -30,8 +30,8 @@
 
 #ifdef WITH_CYCLES_OPTIMIZED_KERNEL_SSE41
 
-#include "kernel.h"
 #include "kernel_compat_cpu.h"
+#include "kernel.h"
 #include "kernel_math.h"
 #include "kernel_types.h"
 #include "kernel_globals.h"