neon/ld3: disable -Wmaybe-uninitialized on GCC < 10

Fixes #657

arm/neon/ld3.h

@@ -32,6 +32,9 @@
 
 HEDLEY_DIAGNOSTIC_PUSH
 SIMDE_DISABLE_UNWANTED_DIAGNOSTICS
+#if defined(HEDLEY_GCC_VERSION) && !HEDLEY_GCC_VERSION_CHECK(10,0,0)
+  SIMDE_DIAGNOSTIC_DISABLE_MAYBE_UNINITIAZILED_
+#endif
 SIMDE_BEGIN_DECLS_
 
 #if !defined(SIMDE_BUG_INTEL_857088)

simde-diagnostic.h

@@ -370,6 +370,13 @@
   #define SIMDE_DIAGNOSTIC_DISABLE_UNREACHABLE_
 #endif
 
+/* This is a false positive from GCC in a few places. */
+#if HEDLEY_GCC_VERSION_CHECK(4,7,0)
+  #define SIMDE_DIAGNOSTIC_DISABLE_MAYBE_UNINITIAZILED_ _Pragma("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
+#else
+  #define SIMDE_DIAGNOSTIC_DISABLE_MAYBE_UNINITIAZILED_
+#endif
+
 #define SIMDE_DISABLE_UNWANTED_DIAGNOSTICS \
   SIMDE_DIAGNOSTIC_DISABLE_PSABI_ \
   SIMDE_DIAGNOSTIC_DISABLE_NO_EMMS_INSTRUCTION_ \