Remove __seg_tls before first release.

  * config/i386/i386-c.c (ix86_target_macros): Remove __SEG_TLS.
  (ix86_register_pragmas): Remove __seg_tls.
  * config/i386/i386-protos.h (ADDR_SPACE_SEG_TLS): Remove.
  * config/i386/i386.c (ix86_print_operand_address_as): Don't handle it.
  (ix86_addr_space_subset_p, TARGET_ADDR_SPACE_SUBSET_P): Remove.
  (ix86_addr_space_convert, TARGET_ADDR_SPACE_CONVERT): Remove.
  (ix86_addr_space_debug, TARGET_ADDR_SPACE_DEBUG): Remove.
  * doc/extend.texi (__seg_tls): Remove item.
testsuite/
  * gcc.target/i386/addr-space-3.c: Remove test.

From-SVN: r233639

7 files changed, 16 insertions, 79 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 54b3f6b..8db1f39 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,14 @@
+2016-02-23  Richard Henderson  <rth@redhat.com>
+
+	* config/i386/i386-c.c (ix86_target_macros): Remove __SEG_TLS.
+	(ix86_register_pragmas): Remove __seg_tls.
+	* config/i386/i386-protos.h (ADDR_SPACE_SEG_TLS): Remove.
+	* config/i386/i386.c (ix86_print_operand_address_as): Don't handle it.
+	(ix86_addr_space_subset_p, TARGET_ADDR_SPACE_SUBSET_P): Remove.
+	(ix86_addr_space_convert, TARGET_ADDR_SPACE_CONVERT): Remove.
+	(ix86_addr_space_debug, TARGET_ADDR_SPACE_DEBUG): Remove.
+	* doc/extend.texi (__seg_tls): Remove item.
+
 2016-02-23  Richard Biener  <rguenther@suse.de>
 
 	* alloc-pool.h (struct allocation_object): Make id member
diff --git a/gcc/config/i386/i386-c.c b/gcc/config/i386/i386-c.c
index ea0c5df..f93a09d 100644
--- a/gcc/config/i386/i386-c.c
+++ b/gcc/config/i386/i386-c.c
@@ -591,7 +591,6 @@ ix86_target_macros (void)
 
   cpp_define (parse_in, "__SEG_FS");
   cpp_define (parse_in, "__SEG_GS");
-  cpp_define (parse_in, "__SEG_TLS");
 }
 
 
@@ -608,7 +607,6 @@ ix86_register_pragmas (void)
 
   c_register_addr_space ("__seg_fs", ADDR_SPACE_SEG_FS);
   c_register_addr_space ("__seg_gs", ADDR_SPACE_SEG_GS);
-  c_register_addr_space ("__seg_tls", ADDR_SPACE_SEG_TLS);
 
 #ifdef REGISTER_SUBTARGET_PRAGMAS
   REGISTER_SUBTARGET_PRAGMAS ();
diff --git a/gcc/config/i386/i386-protos.h b/gcc/config/i386/i386-protos.h
index 252bb19..e4652f3 100644
--- a/gcc/config/i386/i386-protos.h
+++ b/gcc/config/i386/i386-protos.h
@@ -332,4 +332,3 @@ struct ix86_first_cycle_multipass_data_
 
 const addr_space_t ADDR_SPACE_SEG_FS = 1;
 const addr_space_t ADDR_SPACE_SEG_GS = 2;
-const addr_space_t ADDR_SPACE_SEG_TLS = 3;
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 29c73f6..d8a2909 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -17395,8 +17395,6 @@ ix86_print_operand_address_as (FILE *file, rtx addr,
     {
       const char *string;
 
-      if (as == ADDR_SPACE_SEG_TLS)
-	as = DEFAULT_TLS_SEG_REG;
       if (as == ADDR_SPACE_SEG_FS)
 	string = (ASSEMBLER_DIALECT == ASM_ATT ? "%fs:" : "fs:");
       else if (as == ADDR_SPACE_SEG_GS)
@@ -54256,54 +54254,8 @@ ix86_optab_supported_p (int op, machine_mode mode1, machine_mode,
         without resorting to a system call, we cannot convert a
         non-default address space to a default address space.
         Therefore we do not claim %fs or %gs are subsets of generic.
-    (e) However, __seg_tls uses UNSPEC_TP as the base (which itself is
-	stored at __seg_tls:0) so we can map between tls and generic.  */
 
-static bool
-ix86_addr_space_subset_p (addr_space_t subset, addr_space_t superset)
-{
-    return (subset == superset
-	    || (superset == ADDR_SPACE_GENERIC
-		&& subset == ADDR_SPACE_SEG_TLS));
-}
-#undef TARGET_ADDR_SPACE_SUBSET_P
-#define TARGET_ADDR_SPACE_SUBSET_P ix86_addr_space_subset_p
-
-static rtx
-ix86_addr_space_convert (rtx op, tree from_type, tree to_type)
-{
-  addr_space_t from_as = TYPE_ADDR_SPACE (TREE_TYPE (from_type));
-  addr_space_t to_as = TYPE_ADDR_SPACE (TREE_TYPE (to_type));
-
-  /* Conversion between SEG_TLS and GENERIC is handled by adding or
-     subtracting the thread pointer.  */
-  if ((from_as == ADDR_SPACE_GENERIC && to_as == ADDR_SPACE_SEG_TLS)
-      || (from_as == ADDR_SPACE_SEG_TLS && to_as == ADDR_SPACE_GENERIC))
-    {
-      machine_mode mode = GET_MODE (op);
-      if (mode == VOIDmode)
-	mode = ptr_mode;
-      rtx tp = get_thread_pointer (mode, optimize || mode != ptr_mode);
-      return expand_binop (mode, (to_as == ADDR_SPACE_GENERIC
-				  ? add_optab : sub_optab),
-			   op, tp, NULL, 1, OPTAB_WIDEN);
-    }
-
-  return op;
-}
-#undef TARGET_ADDR_SPACE_CONVERT
-#define TARGET_ADDR_SPACE_CONVERT ix86_addr_space_convert
-
-static int
-ix86_addr_space_debug (addr_space_t as)
-{
-  /* Fold __seg_tls to __seg_fs or __seg_gs for debugging.  */
-  if (as == ADDR_SPACE_SEG_TLS)
-    as = DEFAULT_TLS_SEG_REG;
-  return as;
-}
-#undef TARGET_ADDR_SPACE_DEBUG
-#define TARGET_ADDR_SPACE_DEBUG ix86_addr_space_debug
+   Therefore we can (mostly) use the default hooks.  */
 
 /* All use of segmentation is assumed to make address 0 valid.  */
 
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 476d089..4abb0df 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -1473,23 +1473,6 @@ that it installed previously.
 
 The preprocessor symbols @code{__SEG_FS} and @code{__SEG_GS} are
 defined when these address spaces are supported.
-
-@item __seg_tls
-@cindex @code{__seg_tls} x86 named address space
-Some operating systems define either the @code{%fs} or @code{%gs}
-segment as the thread-local storage base for each thread.  Objects
-within this address space are accessed with the appropriate
-segment override prefix.
-
-The pointer located at address 0 within the segment contains the
-offset of the segment within the generic address space.  Thus this
-address space is considered a subspace of the generic address space,
-and the known segment offset is applied when converting addresses
-to and from the generic address space.
-
-The preprocessor symbol @code{__SEG_TLS} is defined when this
-address space is supported.
-
 @end table
 
 @node Zero Length
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d6aa9fa..b824dfb 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2016-02-23  Richard Henderson  <rth@redhat.com>
+
+	* gcc.target/i386/addr-space-3.c: Remove test.
+
 2016-02-23  David Malcolm  <dmalcolm@redhat.com>
 
 	PR preprocessor/69126
diff --git a/gcc/testsuite/gcc.target/i386/addr-space-3.c b/gcc/testsuite/gcc.target/i386/addr-space-3.c
deleted file mode 100644
index 2b6f47e..0000000
--- a/gcc/testsuite/gcc.target/i386/addr-space-3.c
+++ /dev/null
@@ -1,10 +0,0 @@
-/* { dg-do compile } */
-/* { dg-options "-O" } */
-/* { dg-final { scan-assembler "\[fg]s:0" } } */
-
-void test(int *y)
-{
-  int *x = (int __seg_tls *)0;
-  if (x == y)
-    asm("");
-}