ALL: Remove obsolete register keyword

The register keyword was deprecated from the C++11 standard,
<http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4193.html#809>,
and removed from the C++17 standard,
<http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4340>, so
cannot exist in a well-formed C++17 program.

It has never done anything in GCC
<https://gcc.gnu.org/ml/gcc/2010-05/msg00113.html>
and because of the way it is specified in the standard, it is “as
meaningful as whitespace”
<http://www.drdobbs.com/keywords-that-arent-or-comments-by-anoth/184403859>.

The one remaining use of the register keyword is in the DS backend,
where it is used to create a local register variable using the
non-standard GCC Extended Asm feature.

Closes gh-1079.

1 files changed, 2 insertions, 2 deletions

diff --git a/backends/platform/psp/trace.cpp b/backends/platform/psp/trace.cpp
index 50459dcea5..37f58c378a 100644
--- a/backends/platform/psp/trace.cpp
+++ b/backends/platform/psp/trace.cpp
@@ -86,8 +86,8 @@ void PspDebugTrace(bool alsoToScreen, const char *format, ...) {
 //
 void mipsBacktrace(uint32 levels, void **addresses) {
 	// get the current return address
-	register byte *retAddr;
-	register byte *stackPointer;
+	byte *retAddr;
+	byte *stackPointer;
 	GET_RET(retAddr);
 	GET_SP(stackPointer);
 	char string[100];