Remove stale code for hybrid heap and incremental GC

The hybrid heap emulator was last working in the non-SMP R11B
run-time system. When the constant pools were introduced in R12B,
the hybrid heap emulator was not updated to handle them.

At this point, the harm from reduced readability of the code is
greater than any potential usefulness of keeping the code.

2 files changed, 4 insertions, 45 deletions

diff --git a/erts/etc/common/erlc.c b/erts/etc/common/erlc.c
index 23f009ff4d..0223cc5274 100644
--- a/erts/etc/common/erlc.c
+++ b/erts/etc/common/erlc.c
@@ -252,13 +252,6 @@ main(int argc, char** argv)
 		    }
 		}
 		break;
-	    case 'h':
-		if (strcmp(argv[1], "-hybrid") == 0) {
-		    UNSHIFT(argv[1]);
-		} else {
-		    usage();
-		}
-		break;
 	    case 'I':
 		PUSH2("@i", process_opt(&argc, &argv, 0));
 		break;
@@ -649,7 +642,6 @@ usage(void)
 	{"-d", "turn on debugging of erlc itself"},
 	{"-Dname", "define name"},
 	{"-Dname=value", "define name to have value"},
-	{"-hybrid", "compile using hybrid-heap emulator"},
 	{"-help", "shows this help text"},
 	{"-I path", "where to search for include files"},
 	{"-M", "generate a rule for make(1) describing the dependencies"},
diff --git a/erts/etc/common/erlexec.c b/erts/etc/common/erlexec.c
index c9aee16def..4692354ffc 100644
--- a/erts/etc/common/erlexec.c
+++ b/erts/etc/common/erlexec.c
@@ -159,20 +159,13 @@ static char *plusz_val_switches[] = {
 #endif
 
 #define SMP_SUFFIX	  ".smp"
-#define HYBRID_SUFFIX	  ".hybrid"
-
-#ifdef __WIN32__
 #define DEBUG_SUFFIX      ".debug"
-#define EMU_TYPE_SUFFIX_LENGTH  (strlen(HYBRID_SUFFIX)+(strlen(DEBUG_SUFFIX)))
-#else
-/* The length of the longest memory architecture suffix. */
-#define EMU_TYPE_SUFFIX_LENGTH  strlen(HYBRID_SUFFIX)
-#endif
+#define EMU_TYPE_SUFFIX_LENGTH  strlen(DEBUG_SUFFIX)
+
 /*
  * Define flags for different memory architectures.
  */
 #define EMU_TYPE_SMP		0x0001
-#define EMU_TYPE_HYBRID		0x0002
 
 #ifdef __WIN32__
 #define EMU_TYPE_DEBUG		0x0004
@@ -186,7 +179,7 @@ void error(char* format, ...);
  * Local functions.
  */
 
-#if !defined(ERTS_HAVE_SMP_EMU) || !defined(ERTS_HAVE_HYBRID_EMU)
+#if !defined(ERTS_HAVE_SMP_EMU)
 static void usage_notsup(const char *switchname);
 #endif
 static void usage_msg(const char *msg);
@@ -369,9 +362,6 @@ add_extra_suffixes(char *prog, int type)
    if (type == EMU_TYPE_SMP) {
        p = write_str(p, SMP_SUFFIX);
    }
-   else if (type == EMU_TYPE_HYBRID) {
-       p = write_str(p, HYBRID_SUFFIX);
-   }
 #ifdef __WIN32__
    if (dll) {
        p = write_str(p, DLL_EXT);
@@ -537,13 +527,6 @@ int main(int argc, char **argv)
 		emu_type_passed |= EMU_TYPE_DEBUG;
 		emu_type |= EMU_TYPE_DEBUG;
 #endif
-	    } else if (strcmp(argv[i], "-hybrid") == 0) {
-		emu_type_passed |= EMU_TYPE_HYBRID;
-#ifdef ERTS_HAVE_HYBRID_EMU
-		emu_type |= EMU_TYPE_HYBRID;
-#else
-		usage_notsup("-hybrid");
-#endif
 	    } else if (strcmp(argv[i], "-extra") == 0) {
 		break;
 	    }
@@ -554,19 +537,6 @@ int main(int argc, char **argv)
     erts_cpu_info_destroy(cpuinfo);
     cpuinfo = NULL;
 
-    if ((emu_type & EMU_TYPE_HYBRID) && (emu_type & EMU_TYPE_SMP)) {
-	/*
-	 * We have a conflict. Only using explicitly passed arguments
-	 * may solve it...
-	 */
-	emu_type &= emu_type_passed;
-	if ((emu_type & EMU_TYPE_HYBRID) && (emu_type & EMU_TYPE_SMP)) {
-	    usage_msg("Hybrid heap emulator with SMP support selected. The "
-		      "combination hybrid heap and SMP support is currently "
-		      "not supported.");
-	}
-    }
-
     if (malloc_lib) {
 	if (strcmp(malloc_lib, "libc") != 0)
 	    usage("+MYm");
@@ -1117,9 +1087,6 @@ usage_aux(void)
 	  "]"
 #endif
 	  "] "
-#ifdef ERTS_HAVE_HYBRID_EMU
-	  "[-hybrid] "
-#endif
 	  "[-make] [-man [manopts] MANPAGE] [-x] [-emu_args] "
 	  "[-args_file FILENAME] [+A THREADS] [+a SIZE] [+B[c|d|i]] [+c] "
 	  "[+h HEAP_SIZE_OPTION] [+K BOOLEAN] "
@@ -1137,7 +1104,7 @@ usage(const char *switchname)
     usage_aux();
 }
 
-#if !defined(ERTS_HAVE_SMP_EMU) || !defined(ERTS_HAVE_HYBRID_EMU)
+#if !defined(ERTS_HAVE_SMP_EMU)
 static void
 usage_notsup(const char *switchname)
 {