Remove HP/Intel Itanium support.

This CPU architecture has been discontinued.  We already removed HP-UX
support, we never supported Windows/Itanium, and the open source
operating systems that a vintage hardware owner might hope to run have
all either ended Itanium support or never fully released support (NetBSD
may eventually).  The extra code we carry for this rare ISA is now
untested.  It seems like a good time to remove it.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/1415825.1656893299%40sss.pgh.pa.us

1 files changed, 0 insertions, 71 deletions

diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index cbb0ec606f9..6f18b688569 100644
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -133,13 +133,6 @@ static long max_stack_depth_bytes = 100 * 1024L;
 static char *stack_base_ptr = NULL;
 
 /*
- * On IA64 we also have to remember the register stack base.
- */
-#if defined(__ia64__) || defined(__ia64)
-static char *register_stack_base_ptr = NULL;
-#endif
-
-/*
  * Flag to keep track of whether we have started a transaction.
  * For extended query protocol this has to be remembered across messages.
  */
@@ -3392,41 +3385,6 @@ ProcessInterrupts(void)
 		ProcessLogMemoryContextInterrupt();
 }
 
-
-/*
- * IA64-specific code to fetch the AR.BSP register for stack depth checks.
- *
- * We currently support gcc and icc here.
- *
- * Note: while icc accepts gcc asm blocks on x86[_64], this is not true on
- * ia64 (at least not in icc versions before 12.x).  So we have to carry a
- * separate implementation for it.
- */
-#if defined(__ia64__) || defined(__ia64)
-
-#if defined(__INTEL_COMPILER)
-/* icc */
-#include <asm/ia64regs.h>
-#define ia64_get_bsp() ((char *) __getReg(_IA64_REG_AR_BSP))
-#else
-/* gcc */
-static __inline__ char *
-ia64_get_bsp(void)
-{
-	char	   *ret;
-
-	/* the ;; is a "stop", seems to be required before fetching BSP */
-	__asm__ __volatile__(
-						 ";;\n"
-						 "	mov	%0=ar.bsp	\n"
-:						 "=r"(ret));
-
-	return ret;
-}
-#endif
-#endif							/* IA64 */
-
-
 /*
  * set_stack_base: set up reference point for stack depth checking
  *
@@ -3440,12 +3398,7 @@ set_stack_base(void)
 #endif
 	pg_stack_base_t old;
 
-#if defined(__ia64__) || defined(__ia64)
-	old.stack_base_ptr = stack_base_ptr;
-	old.register_stack_base_ptr = register_stack_base_ptr;
-#else
 	old = stack_base_ptr;
-#endif
 
 	/*
 	 * Set up reference point for stack depth checking.  On recent gcc we use
@@ -3457,9 +3410,6 @@ set_stack_base(void)
 #else
 	stack_base_ptr = &stack_base;
 #endif
-#if defined(__ia64__) || defined(__ia64)
-	register_stack_base_ptr = ia64_get_bsp();
-#endif
 
 	return old;
 }
@@ -3476,12 +3426,7 @@ set_stack_base(void)
 void
 restore_stack_base(pg_stack_base_t base)
 {
-#if defined(__ia64__) || defined(__ia64)
-	stack_base_ptr = base.stack_base_ptr;
-	register_stack_base_ptr = base.register_stack_base_ptr;
-#else
 	stack_base_ptr = base;
-#endif
 }
 
 /*
@@ -3538,22 +3483,6 @@ stack_is_too_deep(void)
 		stack_base_ptr != NULL)
 		return true;
 
-	/*
-	 * On IA64 there is a separate "register" stack that requires its own
-	 * independent check.  For this, we have to measure the change in the
-	 * "BSP" pointer from PostgresMain to here.  Logic is just as above,
-	 * except that we know IA64's register stack grows up.
-	 *
-	 * Note we assume that the same max_stack_depth applies to both stacks.
-	 */
-#if defined(__ia64__) || defined(__ia64)
-	stack_depth = (long) (ia64_get_bsp() - register_stack_base_ptr);
-
-	if (stack_depth > max_stack_depth_bytes &&
-		register_stack_base_ptr != NULL)
-		return true;
-#endif							/* IA64 */
-
 	return false;
 }