BUILD: remove obsolete support for -mregparm / USE_REGPARM
This used to be a minor optimization on ix86 where registers are scarce
and the calling convention not very efficient, but this platform is not
relevant enough anymore to warrant all this dirt in the code for the sake
of saving 1 or 2% of performance. Modern platforms don't use this at all
since their calling convention already defaults to using several registers
so better get rid of this once for all.
diff --git a/Makefile b/Makefile
index 042a616..8f8119a 100644
--- a/Makefile
+++ b/Makefile
@@ -27,7 +27,6 @@
# USE_PRIVATE_CACHE : disable shared memory cache of ssl sessions.
# USE_THREAD : enable threads support.
# USE_PTHREAD_PSHARED : enable pthread process shared mutex on sslcache.
-# USE_REGPARM : enable regparm optimization. Recommended on x86.
# USE_STATIC_PCRE : enable static libpcre. Recommended.
# USE_STATIC_PCRE2 : enable static libpcre2.
# USE_TPROXY : enable transparent proxy. Automatic.
@@ -288,7 +287,7 @@
# the reported build options.
use_opts = USE_EPOLL USE_KQUEUE USE_MY_EPOLL USE_MY_SPLICE USE_NETFILTER \
USE_PCRE USE_PCRE_JIT USE_PCRE2 USE_PCRE2_JIT USE_POLL \
- USE_PRIVATE_CACHE USE_THREAD USE_PTHREAD_PSHARED USE_REGPARM \
+ USE_PRIVATE_CACHE USE_THREAD USE_PTHREAD_PSHARED \
USE_STATIC_PCRE USE_STATIC_PCRE2 USE_TPROXY USE_LINUX_TPROXY \
USE_LINUX_SPLICE USE_LIBCRYPT USE_CRYPT_H USE_VSYSCALL \
USE_GETADDRINFO USE_OPENSSL USE_LUA USE_FUTEX USE_ACCEPT4 \
@@ -505,10 +504,6 @@
OPTIONS_OBJS += src/i386-linux-vsys.o
endif
-ifneq ($(USE_REGPARM),)
-OPTIONS_CFLAGS += -DCONFIG_REGPARM=3
-endif
-
ifneq ($(USE_DL),)
OPTIONS_LDFLAGS += -ldl
endif