x86: Add -mindirect-branch=

Add -mindirect-branch= option to convert indirect call and jump to call
and return thunks.  The default is 'keep', which keeps indirect call and
jump unmodified.  'thunk' converts indirect call and jump to call and
return thunk.  'thunk-inline' converts indirect call and jump to inlined
call and return thunk.  'thunk-extern' converts indirect call and jump to
external call and return thunk provided in a separate object file.  You
can control this behavior for a specific function by using the function
attribute indirect_branch.

2 kinds of thunks are geneated.  Memory thunk where the function address
is at the top of the stack:

__x86_indirect_thunk:
	call L2
L1:
	pause
	lfence
	jmp L1
L2:
	lea 8(%rsp), %rsp|lea 4(%esp), %esp
	ret

Indirect jmp via memory, "jmp mem", is converted to

	push memory
	jmp __x86_indirect_thunk

Indirect call via memory, "call mem", is converted to

	jmp L2
L1:
	push [mem]
	jmp __x86_indirect_thunk
L2:
	call L1

Register thunk where the function address is in a register, reg:

__x86_indirect_thunk_reg:
	call	L2
L1:
	pause
	lfence
	jmp	L1
L2:
	movq	%reg, (%rsp)|movl    %reg, (%esp)
	ret

where reg is one of (r|e)ax, (r|e)dx, (r|e)cx, (r|e)bx, (r|e)si, (r|e)di,
(r|e)bp, r8, r9, r10, r11, r12, r13, r14 and r15.

Indirect jmp via register, "jmp reg", is converted to

	jmp __x86_indirect_thunk_reg

Indirect call via register, "call reg", is converted to

	call __x86_indirect_thunk_reg

gcc/

	* config/i386/i386-opts.h (indirect_branch): New.
	* config/i386/i386-protos.h (ix86_output_indirect_jmp): Likewise.
	* config/i386/i386.c (ix86_using_red_zone): Disallow red-zone
	with local indirect jump when converting indirect call and jump.
	(ix86_set_indirect_branch_type): New.
	(ix86_set_current_function): Call ix86_set_indirect_branch_type.
	(indirectlabelno): New.
	(indirect_thunk_needed): Likewise.
	(indirect_thunk_bnd_needed): Likewise.
	(indirect_thunks_used): Likewise.
	(indirect_thunks_bnd_used): Likewise.
	(INDIRECT_LABEL): Likewise.
	(indirect_thunk_name): Likewise.
	(output_indirect_thunk): Likewise.
	(output_indirect_thunk_function): Likewise.
	(ix86_output_indirect_branch): Likewise.
	(ix86_output_indirect_jmp): Likewise.
	(ix86_code_end): Call output_indirect_thunk_function if needed.
	(ix86_output_call_insn): Call ix86_output_indirect_branch if
	needed.
	(ix86_handle_fndecl_attribute): Handle indirect_branch.
	(ix86_attribute_table): Add indirect_branch.
	* config/i386/i386.h (machine_function): Add indirect_branch_type
	and has_local_indirect_jump.
	* config/i386/i386.md (indirect_jump): Set has_local_indirect_jump
	to true.
	(tablejump): Likewise.
	(*indirect_jump): Use ix86_output_indirect_jmp.
	(*tablejump_1): Likewise.
	(simple_return_indirect_internal): Likewise.
	* config/i386/i386.opt (mindirect-branch=): New option.
	(indirect_branch): New.
	(keep): Likewise.
	(thunk): Likewise.
	(thunk-inline): Likewise.
	(thunk-extern): Likewise.
	* doc/extend.texi: Document indirect_branch function attribute.
	* doc/invoke.texi: Document -mindirect-branch= option.

gcc/testsuite/

	* gcc.target/i386/indirect-thunk-1.c: New test.
	* gcc.target/i386/indirect-thunk-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-8.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-7.c: Likewise.

From-SVN: r256660

43 files changed, 1571 insertions, 19 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ed1e0ef..46c4881 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,44 @@
+2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* config/i386/i386-opts.h (indirect_branch): New.
+	* config/i386/i386-protos.h (ix86_output_indirect_jmp): Likewise.
+	* config/i386/i386.c (ix86_using_red_zone): Disallow red-zone
+	with local indirect jump when converting indirect call and jump.
+	(ix86_set_indirect_branch_type): New.
+	(ix86_set_current_function): Call ix86_set_indirect_branch_type.
+	(indirectlabelno): New.
+	(indirect_thunk_needed): Likewise.
+	(indirect_thunk_bnd_needed): Likewise.
+	(indirect_thunks_used): Likewise.
+	(indirect_thunks_bnd_used): Likewise.
+	(INDIRECT_LABEL): Likewise.
+	(indirect_thunk_name): Likewise.
+	(output_indirect_thunk): Likewise.
+	(output_indirect_thunk_function): Likewise.
+	(ix86_output_indirect_branch): Likewise.
+	(ix86_output_indirect_jmp): Likewise.
+	(ix86_code_end): Call output_indirect_thunk_function if needed.
+	(ix86_output_call_insn): Call ix86_output_indirect_branch if
+	needed.
+	(ix86_handle_fndecl_attribute): Handle indirect_branch.
+	(ix86_attribute_table): Add indirect_branch.
+	* config/i386/i386.h (machine_function): Add indirect_branch_type
+	and has_local_indirect_jump.
+	* config/i386/i386.md (indirect_jump): Set has_local_indirect_jump
+	to true.
+	(tablejump): Likewise.
+	(*indirect_jump): Use ix86_output_indirect_jmp.
+	(*tablejump_1): Likewise.
+	(simple_return_indirect_internal): Likewise.
+	* config/i386/i386.opt (mindirect-branch=): New option.
+	(indirect_branch): New.
+	(keep): Likewise.
+	(thunk): Likewise.
+	(thunk-inline): Likewise.
+	(thunk-extern): Likewise.
+	* doc/extend.texi: Document indirect_branch function attribute.
+	* doc/invoke.texi: Document -mindirect-branch= option.
+
 2018-01-14  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR ipa/83051
diff --git a/gcc/config/i386/i386-opts.h b/gcc/config/i386/i386-opts.h
index f245c15..46366cb 100644
--- a/gcc/config/i386/i386-opts.h
+++ b/gcc/config/i386/i386-opts.h
@@ -106,4 +106,17 @@ enum prefer_vector_width {
     PVW_AVX512
 };
 
+/* This is used to mitigate variant #2 of the speculative execution
+   vulnerabilities on x86 processors identified by CVE-2017-5715, aka
+   Spectre.  They convert indirect branches and function returns to
+   call and return thunks to avoid speculative execution via indirect
+   call, jmp and ret.  */
+enum indirect_branch {
+  indirect_branch_unset = 0,
+  indirect_branch_keep,
+  indirect_branch_thunk,
+  indirect_branch_thunk_inline,
+  indirect_branch_thunk_extern
+};
+
 #endif
diff --git a/gcc/config/i386/i386-protos.h b/gcc/config/i386/i386-protos.h
index 0e49652..bf11cc4 100644
--- a/gcc/config/i386/i386-protos.h
+++ b/gcc/config/i386/i386-protos.h
@@ -305,6 +305,7 @@ extern enum attr_cpu ix86_schedule;
 #endif
 
 extern const char * ix86_output_call_insn (rtx_insn *insn, rtx call_op);
+extern const char * ix86_output_indirect_jmp (rtx call_op, bool ret_p);
 extern bool ix86_operands_ok_for_move_multiple (rtx *operands, bool load,
 						machine_mode mode);
 extern int ix86_min_insn_size (rtx_insn *);
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index d56c83f..ab022d2 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -2724,12 +2724,23 @@ make_pass_insert_endbranch (gcc::context *ctxt)
   return new pass_insert_endbranch (ctxt);
 }
 
-/* Return true if a red-zone is in use.  */
+/* Return true if a red-zone is in use.  We can't use red-zone when
+   there are local indirect jumps, like "indirect_jump" or "tablejump",
+   which jumps to another place in the function, since "call" in the
+   indirect thunk pushes the return address onto stack, destroying
+   red-zone.
+
+   TODO: If we can reserve the first 2 WORDs, for PUSH and, another
+   for CALL, in red-zone, we can allow local indirect jumps with
+   indirect thunk.  */
 
 bool
 ix86_using_red_zone (void)
 {
-  return TARGET_RED_ZONE && !TARGET_64BIT_MS_ABI;
+  return (TARGET_RED_ZONE
+	  && !TARGET_64BIT_MS_ABI
+	  && (!cfun->machine->has_local_indirect_jump
+	      || cfun->machine->indirect_branch_type == indirect_branch_keep));
 }
 
 /* Return a string that documents the current -m options.  The caller is
@@ -5802,6 +5813,37 @@ ix86_set_func_type (tree fndecl)
     }
 }
 
+/* Set the indirect_branch_type field from the function FNDECL.  */
+
+static void
+ix86_set_indirect_branch_type (tree fndecl)
+{
+  if (cfun->machine->indirect_branch_type == indirect_branch_unset)
+    {
+      tree attr = lookup_attribute ("indirect_branch",
+				    DECL_ATTRIBUTES (fndecl));
+      if (attr != NULL)
+	{
+	  tree args = TREE_VALUE (attr);
+	  if (args == NULL)
+	    gcc_unreachable ();
+	  tree cst = TREE_VALUE (args);
+	  if (strcmp (TREE_STRING_POINTER (cst), "keep") == 0)
+	    cfun->machine->indirect_branch_type = indirect_branch_keep;
+	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk") == 0)
+	    cfun->machine->indirect_branch_type = indirect_branch_thunk;
+	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-inline") == 0)
+	    cfun->machine->indirect_branch_type = indirect_branch_thunk_inline;
+	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-extern") == 0)
+	    cfun->machine->indirect_branch_type = indirect_branch_thunk_extern;
+	  else
+	    gcc_unreachable ();
+	}
+      else
+	cfun->machine->indirect_branch_type = ix86_indirect_branch;
+    }
+}
+
 /* Establish appropriate back-end context for processing the function
    FNDECL.  The argument might be NULL to indicate processing at top
    level, outside of any function scope.  */
@@ -5817,7 +5859,10 @@ ix86_set_current_function (tree fndecl)
 	 one is extern inline and one isn't.  Call ix86_set_func_type
 	 to set the func_type field.  */
       if (fndecl != NULL_TREE)
-	ix86_set_func_type (fndecl);
+	{
+	  ix86_set_func_type (fndecl);
+	  ix86_set_indirect_branch_type (fndecl);
+	}
       return;
     }
 
@@ -5837,6 +5882,7 @@ ix86_set_current_function (tree fndecl)
     }
 
   ix86_set_func_type (fndecl);
+  ix86_set_indirect_branch_type (fndecl);
 
   tree new_tree = DECL_FUNCTION_SPECIFIC_TARGET (fndecl);
   if (new_tree == NULL_TREE)
@@ -10644,6 +10690,220 @@ ix86_setup_frame_addresses (void)
 # endif
 #endif
 
+/* Label count for call and return thunks.  It is used to make unique
+   labels in call and return thunks.  */
+static int indirectlabelno;
+
+/* True if call and return thunk functions are needed.  */
+static bool indirect_thunk_needed = false;
+/* True if call and return thunk functions with the BND prefix are
+   needed.  */
+static bool indirect_thunk_bnd_needed = false;
+
+/* Bit masks of integer registers, which contain branch target, used
+   by call and return thunks functions.  */
+static int indirect_thunks_used;
+/* Bit masks of integer registers, which contain branch target, used
+   by call and return thunks functions with the BND prefix.  */
+static int indirect_thunks_bnd_used;
+
+#ifndef INDIRECT_LABEL
+# define INDIRECT_LABEL "LIND"
+#endif
+
+/* Fills in the label name that should be used for the indirect thunk.  */
+
+static void
+indirect_thunk_name (char name[32], int regno, bool need_bnd_p)
+{
+  if (USE_HIDDEN_LINKONCE)
+    {
+      const char *bnd = need_bnd_p ? "_bnd" : "";
+      if (regno >= 0)
+	{
+	  const char *reg_prefix;
+	  if (LEGACY_INT_REGNO_P (regno))
+	    reg_prefix = TARGET_64BIT ? "r" : "e";
+	  else
+	    reg_prefix = "";
+	  sprintf (name, "__x86_indirect_thunk%s_%s%s",
+		   bnd, reg_prefix, reg_names[regno]);
+	}
+      else
+	sprintf (name, "__x86_indirect_thunk%s", bnd);
+    }
+  else
+    {
+      if (regno >= 0)
+	{
+	  if (need_bnd_p)
+	    ASM_GENERATE_INTERNAL_LABEL (name, "LITBR", regno);
+	  else
+	    ASM_GENERATE_INTERNAL_LABEL (name, "LITR", regno);
+	}
+      else
+	{
+	  if (need_bnd_p)
+	    ASM_GENERATE_INTERNAL_LABEL (name, "LITB", 0);
+	  else
+	    ASM_GENERATE_INTERNAL_LABEL (name, "LIT", 0);
+	}
+    }
+}
+
+/* Output a call and return thunk for indirect branch.  If BND_P is
+   true, the BND prefix is needed.   If REGNO != -1,  the function
+   address is in REGNO and the call and return thunk looks like:
+
+	call	L2
+   L1:
+	pause
+	jmp	L1
+   L2:
+	mov	%REG, (%sp)
+	ret
+
+   Otherwise, the function address is on the top of stack and the
+   call and return thunk looks like:
+
+	call L2
+  L1:
+	pause
+	jmp L1
+  L2:
+	lea WORD_SIZE(%sp), %sp
+	ret
+ */
+
+static void
+output_indirect_thunk (bool need_bnd_p, int regno)
+{
+  char indirectlabel1[32];
+  char indirectlabel2[32];
+
+  ASM_GENERATE_INTERNAL_LABEL (indirectlabel1, INDIRECT_LABEL,
+			       indirectlabelno++);
+  ASM_GENERATE_INTERNAL_LABEL (indirectlabel2, INDIRECT_LABEL,
+			       indirectlabelno++);
+
+  /* Call */
+  if (need_bnd_p)
+    fputs ("\tbnd call\t", asm_out_file);
+  else
+    fputs ("\tcall\t", asm_out_file);
+  assemble_name_raw (asm_out_file, indirectlabel2);
+  fputc ('\n', asm_out_file);
+
+  ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, indirectlabel1);
+
+  /* Pause + lfence.  */
+  fprintf (asm_out_file, "\tpause\n\tlfence\n");
+
+  /* Jump.  */
+  fputs ("\tjmp\t", asm_out_file);
+  assemble_name_raw (asm_out_file, indirectlabel1);
+  fputc ('\n', asm_out_file);
+
+  ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, indirectlabel2);
+
+  if (regno >= 0)
+    {
+      /* MOV.  */
+      rtx xops[2];
+      xops[0] = gen_rtx_MEM (word_mode, stack_pointer_rtx);
+      xops[1] = gen_rtx_REG (word_mode, regno);
+      output_asm_insn ("mov\t{%1, %0|%0, %1}", xops);
+    }
+  else
+    {
+      /* LEA.  */
+      rtx xops[2];
+      xops[0] = stack_pointer_rtx;
+      xops[1] = plus_constant (Pmode, stack_pointer_rtx, UNITS_PER_WORD);
+      output_asm_insn ("lea\t{%E1, %0|%0, %E1}", xops);
+    }
+
+  if (need_bnd_p)
+    fputs ("\tbnd ret\n", asm_out_file);
+  else
+    fputs ("\tret\n", asm_out_file);
+}
+
+/* Output a funtion with a call and return thunk for indirect branch.
+   If BND_P is true, the BND prefix is needed.   If REGNO != -1,  the
+   function address is in REGNO.  Otherwise, the function address is
+   on the top of stack.  */
+
+static void
+output_indirect_thunk_function (bool need_bnd_p, int regno)
+{
+  char name[32];
+  tree decl;
+
+  /* Create __x86_indirect_thunk/__x86_indirect_thunk_bnd.  */
+  indirect_thunk_name (name, regno, need_bnd_p);
+  decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL,
+		     get_identifier (name),
+		     build_function_type_list (void_type_node, NULL_TREE));
+  DECL_RESULT (decl) = build_decl (BUILTINS_LOCATION, RESULT_DECL,
+				   NULL_TREE, void_type_node);
+  TREE_PUBLIC (decl) = 1;
+  TREE_STATIC (decl) = 1;
+  DECL_IGNORED_P (decl) = 1;
+
+#if TARGET_MACHO
+  if (TARGET_MACHO)
+    {
+      switch_to_section (darwin_sections[picbase_thunk_section]);
+      fputs ("\t.weak_definition\t", asm_out_file);
+      assemble_name (asm_out_file, name);
+      fputs ("\n\t.private_extern\t", asm_out_file);
+      assemble_name (asm_out_file, name);
+      putc ('\n', asm_out_file);
+      ASM_OUTPUT_LABEL (asm_out_file, name);
+      DECL_WEAK (decl) = 1;
+    }
+  else
+#endif
+    if (USE_HIDDEN_LINKONCE)
+      {
+	cgraph_node::create (decl)->set_comdat_group (DECL_ASSEMBLER_NAME (decl));
+
+	targetm.asm_out.unique_section (decl, 0);
+	switch_to_section (get_named_section (decl, NULL, 0));
+
+	targetm.asm_out.globalize_label (asm_out_file, name);
+	fputs ("\t.hidden\t", asm_out_file);
+	assemble_name (asm_out_file, name);
+	putc ('\n', asm_out_file);
+	ASM_DECLARE_FUNCTION_NAME (asm_out_file, name, decl);
+      }
+    else
+      {
+	switch_to_section (text_section);
+	ASM_OUTPUT_LABEL (asm_out_file, name);
+      }
+
+  DECL_INITIAL (decl) = make_node (BLOCK);
+  current_function_decl = decl;
+  allocate_struct_function (decl, false);
+  init_function_start (decl);
+  /* We're about to hide the function body from callees of final_* by
+     emitting it directly; tell them we're a thunk, if they care.  */
+  cfun->is_thunk = true;
+  first_function_block_is_cold = false;
+  /* Make sure unwind info is emitted for the thunk if needed.  */
+  final_start_function (emit_barrier (), asm_out_file, 1);
+
+  output_indirect_thunk (need_bnd_p, regno);
+
+  final_end_function ();
+  init_insn_lengths ();
+  free_after_compilation (cfun);
+  set_cfun (NULL);
+  current_function_decl = NULL;
+}
+
 static int pic_labels_used;
 
 /* Fills in the label name that should be used for a pc thunk for
@@ -10670,11 +10930,32 @@ ix86_code_end (void)
   rtx xops[2];
   int regno;
 
+  if (indirect_thunk_needed)
+    output_indirect_thunk_function (false, -1);
+  if (indirect_thunk_bnd_needed)
+    output_indirect_thunk_function (true, -1);
+
+  for (regno = FIRST_REX_INT_REG; regno <= LAST_REX_INT_REG; regno++)
+    {
+      int i = regno - FIRST_REX_INT_REG + LAST_INT_REG + 1;
+      if ((indirect_thunks_used & (1 << i)))
+	output_indirect_thunk_function (false, regno);
+
+      if ((indirect_thunks_bnd_used & (1 << i)))
+	output_indirect_thunk_function (true, regno);
+    }
+
   for (regno = FIRST_INT_REG; regno <= LAST_INT_REG; regno++)
     {
       char name[32];
       tree decl;
 
+      if ((indirect_thunks_used & (1 << regno)))
+	output_indirect_thunk_function (false, regno);
+
+      if ((indirect_thunks_bnd_used & (1 << regno)))
+	output_indirect_thunk_function (true, regno);
+
       if (!(pic_labels_used & (1 << regno)))
 	continue;
 
@@ -28155,12 +28436,292 @@ ix86_nopic_noplt_attribute_p (rtx call_op)
   return false;
 }
 
+/* Output indirect branch via a call and return thunk.  CALL_OP is a
+   register which contains the branch target.  XASM is the assembly
+   template for CALL_OP.  Branch is a tail call if SIBCALL_P is true.
+   A normal call is converted to:
+
+	call __x86_indirect_thunk_reg
+
+   and a tail call is converted to:
+
+	jmp __x86_indirect_thunk_reg
+ */
+
+static void
+ix86_output_indirect_branch_via_reg (rtx call_op, bool sibcall_p)
+{
+  char thunk_name_buf[32];
+  char *thunk_name;
+  bool need_bnd_p = ix86_bnd_prefixed_insn_p (current_output_insn);
+  int regno = REGNO (call_op);
+
+  if (cfun->machine->indirect_branch_type
+      != indirect_branch_thunk_inline)
+    {
+      if (cfun->machine->indirect_branch_type == indirect_branch_thunk)
+	{
+	  int i = regno;
+	  if (i >= FIRST_REX_INT_REG)
+	    i -= (FIRST_REX_INT_REG - LAST_INT_REG - 1);
+	  if (need_bnd_p)
+	    indirect_thunks_bnd_used |= 1 << i;
+	  else
+	    indirect_thunks_used |= 1 << i;
+	}
+      indirect_thunk_name (thunk_name_buf, regno, need_bnd_p);
+      thunk_name = thunk_name_buf;
+    }
+  else
+    thunk_name = NULL;
+
+  if (sibcall_p)
+    {
+      if (thunk_name != NULL)
+	{
+	  if (need_bnd_p)
+	    fprintf (asm_out_file, "\tbnd jmp\t%s\n", thunk_name);
+	  else
+	    fprintf (asm_out_file, "\tjmp\t%s\n", thunk_name);
+	}
+      else
+	output_indirect_thunk (need_bnd_p, regno);
+    }
+  else
+    {
+      if (thunk_name != NULL)
+	{
+	  if (need_bnd_p)
+	    fprintf (asm_out_file, "\tbnd call\t%s\n", thunk_name);
+	  else
+	    fprintf (asm_out_file, "\tcall\t%s\n", thunk_name);
+	  return;
+	}
+
+      char indirectlabel1[32];
+      char indirectlabel2[32];
+
+      ASM_GENERATE_INTERNAL_LABEL (indirectlabel1,
+				   INDIRECT_LABEL,
+				   indirectlabelno++);
+      ASM_GENERATE_INTERNAL_LABEL (indirectlabel2,
+				   INDIRECT_LABEL,
+				   indirectlabelno++);
+
+      /* Jump.  */
+      if (need_bnd_p)
+	fputs ("\tbnd jmp\t", asm_out_file);
+      else
+	fputs ("\tjmp\t", asm_out_file);
+      assemble_name_raw (asm_out_file, indirectlabel2);
+      fputc ('\n', asm_out_file);
+
+      ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, indirectlabel1);
+
+      if (thunk_name != NULL)
+	{
+	  if (need_bnd_p)
+	    fprintf (asm_out_file, "\tbnd jmp\t%s\n", thunk_name);
+	  else
+	    fprintf (asm_out_file, "\tjmp\t%s\n", thunk_name);
+	}
+      else
+	output_indirect_thunk (need_bnd_p, regno);
+
+      ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, indirectlabel2);
+
+      /* Call.  */
+      if (need_bnd_p)
+	fputs ("\tbnd call\t", asm_out_file);
+      else
+	fputs ("\tcall\t", asm_out_file);
+      assemble_name_raw (asm_out_file, indirectlabel1);
+      fputc ('\n', asm_out_file);
+    }
+}
+
+/* Output indirect branch via a call and return thunk.  CALL_OP is
+   the branch target.  XASM is the assembly template for CALL_OP.
+   Branch is a tail call if SIBCALL_P is true.  A normal call is
+   converted to:
+
+	jmp L2
+   L1:
+	push CALL_OP
+	jmp __x86_indirect_thunk
+   L2:
+	call L1
+
+   and a tail call is converted to:
+
+	push CALL_OP
+	jmp __x86_indirect_thunk
+ */
+
+static void
+ix86_output_indirect_branch_via_push (rtx call_op, const char *xasm,
+				      bool sibcall_p)
+{
+  char thunk_name_buf[32];
+  char *thunk_name;
+  char push_buf[64];
+  bool need_bnd_p = ix86_bnd_prefixed_insn_p (current_output_insn);
+  int regno = -1;
+
+  if (cfun->machine->indirect_branch_type
+      != indirect_branch_thunk_inline)
+    {
+      if (cfun->machine->indirect_branch_type == indirect_branch_thunk)
+	{
+	  if (need_bnd_p)
+	    indirect_thunk_bnd_needed = true;
+	  else
+	    indirect_thunk_needed = true;
+	}
+      indirect_thunk_name (thunk_name_buf, regno, need_bnd_p);
+      thunk_name = thunk_name_buf;
+    }
+  else
+    thunk_name = NULL;
+
+  snprintf (push_buf, sizeof (push_buf), "push{%c}\t%s",
+	    TARGET_64BIT ? 'q' : 'l', xasm);
+
+  if (sibcall_p)
+    {
+      output_asm_insn (push_buf, &call_op);
+      if (thunk_name != NULL)
+	{
+	  if (need_bnd_p)
+	    fprintf (asm_out_file, "\tbnd jmp\t%s\n", thunk_name);
+	  else
+	    fprintf (asm_out_file, "\tjmp\t%s\n", thunk_name);
+	}
+      else
+	output_indirect_thunk (need_bnd_p, regno);
+    }
+  else
+    {
+      char indirectlabel1[32];
+      char indirectlabel2[32];
+
+      ASM_GENERATE_INTERNAL_LABEL (indirectlabel1,
+				   INDIRECT_LABEL,
+				   indirectlabelno++);
+      ASM_GENERATE_INTERNAL_LABEL (indirectlabel2,
+				   INDIRECT_LABEL,
+				   indirectlabelno++);
+
+      /* Jump.  */
+      if (need_bnd_p)
+	fputs ("\tbnd jmp\t", asm_out_file);
+      else
+	fputs ("\tjmp\t", asm_out_file);
+      assemble_name_raw (asm_out_file, indirectlabel2);
+      fputc ('\n', asm_out_file);
+
+      ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, indirectlabel1);
+
+      /* An external function may be called via GOT, instead of PLT.  */
+      if (MEM_P (call_op))
+	{
+	  struct ix86_address parts;
+	  rtx addr = XEXP (call_op, 0);
+	  if (ix86_decompose_address (addr, &parts)
+	      && parts.base == stack_pointer_rtx)
+	    {
+	      /* Since call will adjust stack by -UNITS_PER_WORD,
+		 we must convert "disp(stack, index, scale)" to
+		 "disp+UNITS_PER_WORD(stack, index, scale)".  */
+	      if (parts.index)
+		{
+		  addr = gen_rtx_MULT (Pmode, parts.index,
+				       GEN_INT (parts.scale));
+		  addr = gen_rtx_PLUS (Pmode, stack_pointer_rtx,
+				       addr);
+		}
+	      else
+		addr = stack_pointer_rtx;
+
+	      rtx disp;
+	      if (parts.disp != NULL_RTX)
+		disp = plus_constant (Pmode, parts.disp,
+				      UNITS_PER_WORD);
+	      else
+		disp = GEN_INT (UNITS_PER_WORD);
+
+	      addr = gen_rtx_PLUS (Pmode, addr, disp);
+	      call_op = gen_rtx_MEM (GET_MODE (call_op), addr);
+	    }
+	}
+
+      output_asm_insn (push_buf, &call_op);
+
+      if (thunk_name != NULL)
+	{
+	  if (need_bnd_p)
+	    fprintf (asm_out_file, "\tbnd jmp\t%s\n", thunk_name);
+	  else
+	    fprintf (asm_out_file, "\tjmp\t%s\n", thunk_name);
+	}
+      else
+	output_indirect_thunk (need_bnd_p, regno);
+
+      ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, indirectlabel2);
+
+      /* Call.  */
+      if (need_bnd_p)
+	fputs ("\tbnd call\t", asm_out_file);
+      else
+	fputs ("\tcall\t", asm_out_file);
+      assemble_name_raw (asm_out_file, indirectlabel1);
+      fputc ('\n', asm_out_file);
+    }
+}
+
+/* Output indirect branch via a call and return thunk.  CALL_OP is
+   the branch target.  XASM is the assembly template for CALL_OP.
+   Branch is a tail call if SIBCALL_P is true.   */
+
+static void
+ix86_output_indirect_branch (rtx call_op, const char *xasm,
+			     bool sibcall_p)
+{
+  if (REG_P (call_op))
+    ix86_output_indirect_branch_via_reg (call_op, sibcall_p);
+  else
+    ix86_output_indirect_branch_via_push (call_op, xasm, sibcall_p);
+}
+/* Output indirect jump.  CALL_OP is the jump target.  Jump is a
+   function return if RET_P is true.  */
+
+const char *
+ix86_output_indirect_jmp (rtx call_op, bool ret_p)
+{
+  if (cfun->machine->indirect_branch_type != indirect_branch_keep)
+    {
+      /* We can't have red-zone if this isn't a function return since
+	 "call" in the indirect thunk pushes the return address onto
+	 stack, destroying red-zone.  */
+      if (!ret_p && ix86_red_zone_size != 0)
+	gcc_unreachable ();
+
+      ix86_output_indirect_branch (call_op, "%0", true);
+      return "";
+    }
+  else
+    return "%!jmp\t%A0";
+}
+
 /* Output the assembly for a call instruction.  */
 
 const char *
 ix86_output_call_insn (rtx_insn *insn, rtx call_op)
 {
   bool direct_p = constant_call_address_operand (call_op, VOIDmode);
+  bool output_indirect_p
+    = (!TARGET_SEH
+       && cfun->machine->indirect_branch_type != indirect_branch_keep);
   bool seh_nop_p = false;
   const char *xasm;
 
@@ -28170,10 +28731,21 @@ ix86_output_call_insn (rtx_insn *insn, rtx call_op)
 	{
 	  if (ix86_nopic_noplt_attribute_p (call_op))
 	    {
+	      direct_p = false;
 	      if (TARGET_64BIT)
-		xasm = "%!jmp\t{*%p0@GOTPCREL(%%rip)|[QWORD PTR %p0@GOTPCREL[rip]]}";
+		{
+		  if (output_indirect_p)
+		    xasm = "{%p0@GOTPCREL(%%rip)|[QWORD PTR %p0@GOTPCREL[rip]]}";
+		  else
+		    xasm = "%!jmp\t{*%p0@GOTPCREL(%%rip)|[QWORD PTR %p0@GOTPCREL[rip]]}";
+		}
 	      else
-		xasm = "%!jmp\t{*%p0@GOT|[DWORD PTR %p0@GOT]}";
+		{
+		  if (output_indirect_p)
+		    xasm = "{%p0@GOT|[DWORD PTR %p0@GOT]}";
+		  else
+		    xasm = "%!jmp\t{*%p0@GOT|[DWORD PTR %p0@GOT]}";
+		}
 	    }
 	  else
 	    xasm = "%!jmp\t%P0";
@@ -28183,9 +28755,17 @@ ix86_output_call_insn (rtx_insn *insn, rtx call_op)
       else if (TARGET_SEH)
 	xasm = "%!rex.W jmp\t%A0";
       else
-	xasm = "%!jmp\t%A0";
+	{
+	  if (output_indirect_p)
+	    xasm = "%0";
+	  else
+	    xasm = "%!jmp\t%A0";
+	}
 
-      output_asm_insn (xasm, &call_op);
+      if (output_indirect_p && !direct_p)
+	ix86_output_indirect_branch (call_op, xasm, true);
+      else
+	output_asm_insn (xasm, &call_op);
       return "";
     }
 
@@ -28223,18 +28803,37 @@ ix86_output_call_insn (rtx_insn *insn, rtx call_op)
     {
       if (ix86_nopic_noplt_attribute_p (call_op))
 	{
+	  direct_p = false;
 	  if (TARGET_64BIT)
-	    xasm = "%!call\t{*%p0@GOTPCREL(%%rip)|[QWORD PTR %p0@GOTPCREL[rip]]}";
+	    {
+	      if (output_indirect_p)
+		xasm = "{%p0@GOTPCREL(%%rip)|[QWORD PTR %p0@GOTPCREL[rip]]}";
+	      else
+		xasm = "%!call\t{*%p0@GOTPCREL(%%rip)|[QWORD PTR %p0@GOTPCREL[rip]]}";
+	    }
 	  else
-	    xasm = "%!call\t{*%p0@GOT|[DWORD PTR %p0@GOT]}";
+	    {
+	      if (output_indirect_p)
+		xasm = "{%p0@GOT|[DWORD PTR %p0@GOT]}";
+	      else
+		xasm = "%!call\t{*%p0@GOT|[DWORD PTR %p0@GOT]}";
+	    }
 	}
       else
 	xasm = "%!call\t%P0";
     }
   else
-    xasm = "%!call\t%A0";
+    {
+      if (output_indirect_p)
+	xasm = "%0";
+      else
+	xasm = "%!call\t%A0";
+    }
 
-  output_asm_insn (xasm, &call_op);
+  if (output_indirect_p && !direct_p)
+    ix86_output_indirect_branch (call_op, xasm, false);
+  else
+    output_asm_insn (xasm, &call_op);
 
   if (seh_nop_p)
     return "nop";
@@ -40392,7 +40991,7 @@ ix86_handle_struct_attribute (tree *node, tree name, tree, int,
 }
 
 static tree
-ix86_handle_fndecl_attribute (tree *node, tree name, tree, int,
+ix86_handle_fndecl_attribute (tree *node, tree name, tree args, int,
 			      bool *no_add_attrs)
 {
   if (TREE_CODE (*node) != FUNCTION_DECL)
@@ -40401,6 +41000,29 @@ ix86_handle_fndecl_attribute (tree *node, tree name, tree, int,
                name);
       *no_add_attrs = true;
     }
+
+  if (is_attribute_p ("indirect_branch", name))
+    {
+      tree cst = TREE_VALUE (args);
+      if (TREE_CODE (cst) != STRING_CST)
+	{
+	  warning (OPT_Wattributes,
+		   "%qE attribute requires a string constant argument",
+		   name);
+	  *no_add_attrs = true;
+	}
+      else if (strcmp (TREE_STRING_POINTER (cst), "keep") != 0
+	       && strcmp (TREE_STRING_POINTER (cst), "thunk") != 0
+	       && strcmp (TREE_STRING_POINTER (cst), "thunk-inline") != 0
+	       && strcmp (TREE_STRING_POINTER (cst), "thunk-extern") != 0)
+	{
+	  warning (OPT_Wattributes,
+		   "argument to %qE attribute is not "
+		   "(keep|thunk|thunk-inline|thunk-extern)", name);
+	  *no_add_attrs = true;
+	}
+    }
+
   return NULL_TREE;
 }
 
@@ -44847,6 +45469,8 @@ static const struct attribute_spec ix86_attribute_table[] =
     ix86_handle_no_caller_saved_registers_attribute, NULL },
   { "naked", 0, 0, true, false, false, false,
     ix86_handle_fndecl_attribute, NULL },
+  { "indirect_branch", 1, 1, true, false, false, false,
+    ix86_handle_fndecl_attribute, NULL },
 
   /* End element.  */
   { NULL, 0, 0, false, false, false, false, NULL, NULL }
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 933f261..3b93908 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -2570,6 +2570,13 @@ struct GTY(()) machine_function {
   /* Function type.  */
   ENUM_BITFIELD(function_type) func_type : 2;
 
+  /* How to generate indirec branch.  */
+  ENUM_BITFIELD(indirect_branch) indirect_branch_type : 3;
+
+  /* If true, the current function has local indirect jumps, like
+     "indirect_jump" or "tablejump".  */
+  BOOL_BITFIELD has_local_indirect_jump : 1;
+
   /* If true, the current function is a function specified with
      the "interrupt" or "no_caller_saved_registers" attribute.  */
   BOOL_BITFIELD no_caller_saved_registers : 1;
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 3f58780..1ba144d 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -12313,13 +12313,18 @@
 {
   if (TARGET_X32)
     operands[0] = convert_memory_address (word_mode, operands[0]);
+  cfun->machine->has_local_indirect_jump = true;
 })
 
 (define_insn "*indirect_jump"
   [(set (pc) (match_operand:W 0 "indirect_branch_operand" "rBw"))]
   ""
-  "%!jmp\t%A0"
-  [(set_attr "type" "ibr")
+  "* return ix86_output_indirect_jmp (operands[0], false);"
+  [(set (attr "type")
+     (if_then_else (match_test "(cfun->machine->indirect_branch_type
+				 != indirect_branch_keep)")
+	(const_string "multi")
+	(const_string "ibr")))
    (set_attr "length_immediate" "0")
    (set_attr "maybe_prefix_bnd" "1")])
 
@@ -12362,14 +12367,19 @@
 
   if (TARGET_X32)
     operands[0] = convert_memory_address (word_mode, operands[0]);
+  cfun->machine->has_local_indirect_jump = true;
 })
 
 (define_insn "*tablejump_1"
   [(set (pc) (match_operand:W 0 "indirect_branch_operand" "rBw"))
    (use (label_ref (match_operand 1)))]
   ""
-  "%!jmp\t%A0"
-  [(set_attr "type" "ibr")
+  "* return ix86_output_indirect_jmp (operands[0], false);"
+  [(set (attr "type")
+     (if_then_else (match_test "(cfun->machine->indirect_branch_type
+				 != indirect_branch_keep)")
+	(const_string "multi")
+	(const_string "ibr")))
    (set_attr "length_immediate" "0")
    (set_attr "maybe_prefix_bnd" "1")])
 
@@ -13097,8 +13107,12 @@
   [(simple_return)
    (use (match_operand 0 "register_operand" "r"))]
   "reload_completed"
-  "%!jmp\t%A0"
-  [(set_attr "type" "ibr")
+  "* return ix86_output_indirect_jmp (operands[0], true);"
+  [(set (attr "type")
+     (if_then_else (match_test "(cfun->machine->indirect_branch_type
+				 != indirect_branch_keep)")
+	(const_string "multi")
+	(const_string "ibr")))
    (set_attr "length_immediate" "0")
    (set_attr "maybe_prefix_bnd" "1")])
 
diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt
index 09aaa97..59e5cc8 100644
--- a/gcc/config/i386/i386.opt
+++ b/gcc/config/i386/i386.opt
@@ -1021,3 +1021,23 @@ indirect jump.
 mforce-indirect-call
 Target Report Var(flag_force_indirect_call) Init(0)
 Make all function calls indirect.
+
+mindirect-branch=
+Target Report RejectNegative Joined Enum(indirect_branch) Var(ix86_indirect_branch) Init(indirect_branch_keep)
+Convert indirect call and jump to call and return thunks.
+
+Enum
+Name(indirect_branch) Type(enum indirect_branch)
+Known indirect branch choices (for use with the -mindirect-branch= option):
+
+EnumValue
+Enum(indirect_branch) String(keep) Value(indirect_branch_keep)
+
+EnumValue
+Enum(indirect_branch) String(thunk) Value(indirect_branch_thunk)
+
+EnumValue
+Enum(indirect_branch) String(thunk-inline) Value(indirect_branch_thunk_inline)
+
+EnumValue
+Enum(indirect_branch) String(thunk-extern) Value(indirect_branch_thunk_extern)
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index f3e4a63..ddb6035 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -5754,6 +5754,16 @@ Specify which floating-point unit to use.  You must specify the
 @code{target("fpmath=sse+387")} because the comma would separate
 different options.
 
+@item indirect_branch("@var{choice}")
+@cindex @code{indirect_branch} function attribute, x86
+On x86 targets, the @code{indirect_branch} attribute causes the compiler
+to convert indirect call and jump with @var{choice}.  @samp{keep}
+keeps indirect call and jump unmodified.  @samp{thunk} converts indirect
+call and jump to call and return thunk.  @samp{thunk-inline} converts
+indirect call and jump to inlined call and return thunk.
+@samp{thunk-extern} converts indirect call and jump to external call
+and return thunk provided in a separate object file.
+
 @item nocf_check
 @cindex @code{nocf_check} function attribute
 The @code{nocf_check} attribute on a function is used to inform the
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 28c61a0..c0073a1 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1229,7 +1229,8 @@ See RS/6000 and PowerPC Options.
 -mstack-protector-guard-reg=@var{reg} @gol
 -mstack-protector-guard-offset=@var{offset} @gol
 -mstack-protector-guard-symbol=@var{symbol} -mmitigate-rop @gol
--mgeneral-regs-only  -mcall-ms2sysv-xlogues}
+-mgeneral-regs-only -mcall-ms2sysv-xlogues @gol
+-mindirect-branch=@var{choice}}
 
 @emph{x86 Windows Options}
 @gccoptlist{-mconsole  -mcygwin  -mno-cygwin  -mdll @gol
@@ -26845,6 +26846,17 @@ Generate code that uses only the general-purpose registers.  This
 prevents the compiler from using floating-point, vector, mask and bound
 registers.
 
+@item -mindirect-branch=@var{choice}
+@opindex -mindirect-branch
+Convert indirect call and jump with @var{choice}.  The default is
+@samp{keep}, which keeps indirect call and jump unmodified.
+@samp{thunk} converts indirect call and jump to call and return thunk.
+@samp{thunk-inline} converts indirect call and jump to inlined call
+and return thunk.  @samp{thunk-extern} converts indirect call and jump
+to external call and return thunk provided in a separate object file.
+You can control this behavior for a specific function by using the
+function attribute @code{indirect_branch}.  @xref{Function Attributes}.
+
 @end table
 
 These @samp{-m} switches are supported in addition to the above
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c07fada..c623fc5 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,39 @@
+2018-01-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* gcc.target/i386/indirect-thunk-1.c: New test.
+	* gcc.target/i386/indirect-thunk-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-5.c: Likewise.
+	* gcc.target/i386/indirect-thunk-6.c: Likewise.
+	* gcc.target/i386/indirect-thunk-7.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-7.c: Likewise.
+	* gcc.target/i386/indirect-thunk-attr-8.c: Likewise.
+	* gcc.target/i386/indirect-thunk-bnd-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-bnd-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-bnd-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-bnd-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-5.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-6.c: Likewise.
+	* gcc.target/i386/indirect-thunk-extern-7.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-1.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-2.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-3.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-4.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-5.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-6.c: Likewise.
+	* gcc.target/i386/indirect-thunk-inline-7.c: Likewise.
+
 2018-01-14  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR ipa/83051
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c
new file mode 100644
index 0000000..d983e1c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch;
+
+void
+male_indirect_jump (long offset)
+{
+  dispatch(offset);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c
new file mode 100644
index 0000000..58f09b4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch[256];
+
+void
+male_indirect_jump (long offset)
+{
+  dispatch[offset](offset);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c
new file mode 100644
index 0000000..f20d35c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch;
+
+int
+male_indirect_jump (long offset)
+{
+  dispatch(offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c
new file mode 100644
index 0000000..0eff8fb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch[256];
+
+int
+male_indirect_jump (long offset)
+{
+  dispatch[offset](offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-5.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-5.c
new file mode 100644
index 0000000..a25b20d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-5.c
@@ -0,0 +1,17 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk" } */
+
+extern void bar (void);
+
+void
+foo (void)
+{
+  bar ();
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*bar@GOT" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-6.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-6.c
new file mode 100644
index 0000000..cff114a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-6.c
@@ -0,0 +1,18 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk" } */
+
+extern void bar (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*bar@GOT" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c
new file mode 100644
index 0000000..afdb600
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c
@@ -0,0 +1,44 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+
+void func0 (void);
+void func1 (void);
+void func2 (void);
+void func3 (void);
+void func4 (void);
+void func4 (void);
+void func5 (void);
+
+void
+bar (int i)
+{
+  switch (i)
+    {
+    default:
+      func0 ();
+      break;
+    case 1:
+      func1 ();
+      break;
+    case 2:
+      func2 ();
+      break;
+    case 3:
+      func3 ();
+      break;
+    case 4:
+      func4 ();
+      break;
+    case 5:
+      func5 ();
+      break;
+    }
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c
new file mode 100644
index 0000000..d64d978
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c
@@ -0,0 +1,23 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch;
+
+extern void male_indirect_jump (long)
+  __attribute__ ((indirect_branch("thunk")));
+
+void
+male_indirect_jump (long offset)
+{
+  dispatch(offset);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c
new file mode 100644
index 0000000..9306745
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch[256];
+
+__attribute__ ((indirect_branch("thunk")))
+void
+male_indirect_jump (long offset)
+{
+  dispatch[offset](offset);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c
new file mode 100644
index 0000000..97744d6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c
@@ -0,0 +1,23 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch;
+extern int male_indirect_jump (long)
+  __attribute__ ((indirect_branch("thunk-inline")));
+
+int
+male_indirect_jump (long offset)
+{
+  dispatch(offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c
new file mode 100644
index 0000000..bfce3ea
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch[256];
+
+__attribute__ ((indirect_branch("thunk-inline")))
+int
+male_indirect_jump (long offset)
+{
+  dispatch[offset](offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c
new file mode 100644
index 0000000..0833606
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch;
+extern int male_indirect_jump (long)
+  __attribute__ ((indirect_branch("thunk-extern")));
+
+int
+male_indirect_jump (long offset)
+{
+  dispatch(offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c
new file mode 100644
index 0000000..2eba0fb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch[256];
+
+__attribute__ ((indirect_branch("thunk-extern")))
+int
+male_indirect_jump (long offset)
+{
+  dispatch[offset](offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c
new file mode 100644
index 0000000..f58427e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c
@@ -0,0 +1,44 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-pic" } */
+
+void func0 (void);
+void func1 (void);
+void func2 (void);
+void func3 (void);
+void func4 (void);
+void func4 (void);
+void func5 (void);
+
+__attribute__ ((indirect_branch("thunk-extern")))
+void
+bar (int i)
+{
+  switch (i)
+    {
+    default:
+      func0 ();
+      break;
+    case 1:
+      func1 ();
+      break;
+    case 2:
+      func2 ();
+      break;
+    case 3:
+      func3 ();
+      break;
+    case 4:
+      func4 ();
+      break;
+    case 5:
+      func5 ();
+      break;
+    }
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c
new file mode 100644
index 0000000..564ed39
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c
@@ -0,0 +1,42 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+
+void func0 (void);
+void func1 (void);
+void func2 (void);
+void func3 (void);
+void func4 (void);
+void func4 (void);
+void func5 (void);
+
+__attribute__ ((indirect_branch("keep")))
+void
+bar (int i)
+{
+  switch (i)
+    {
+    default:
+      func0 ();
+      break;
+    case 1:
+      func1 ();
+      break;
+    case 2:
+      func2 ();
+      break;
+    case 3:
+      func3 ();
+      break;
+    case 4:
+      func4 ();
+      break;
+    case 5:
+      func5 ();
+      break;
+    }
+}
+
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-1.c
new file mode 100644
index 0000000..50fbee2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-1.c
@@ -0,0 +1,20 @@
+/* { dg-do compile { target { ! x32 } } } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fno-pic" } */
+
+void (*dispatch) (char *);
+char buf[10];
+
+void
+foo (void)
+{
+  dispatch (buf);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "pushq\[ \t\]%rax" { target x32 } } } */
+/* { dg-final { scan-assembler "bnd jmp\[ \t\]*__x86_indirect_thunk_bnd" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "bnd call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "bnd ret" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-2.c
new file mode 100644
index 0000000..2976e67
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-2.c
@@ -0,0 +1,21 @@
+/* { dg-do compile { target { ! x32 } } } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fno-pic" } */
+
+void (*dispatch) (char *);
+char buf[10];
+
+int
+foo (void)
+{
+  dispatch (buf);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "pushq\[ \t\]%rax" { target x32 } } } */
+/* { dg-final { scan-assembler "bnd jmp\[ \t\]*__x86_indirect_thunk_bnd" } } */
+/* { dg-final { scan-assembler "bnd jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "bnd call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "bnd ret" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-3.c
new file mode 100644
index 0000000..da4bc98
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-3.c
@@ -0,0 +1,19 @@
+/* { dg-do compile { target { *-*-linux* && { ! x32 } } } } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fpic -fno-plt" } */
+
+void bar (char *);
+char buf[10];
+
+void
+foo (void)
+{
+  bar (buf);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*bar@GOT" } } */
+/* { dg-final { scan-assembler "bnd jmp\[ \t\]*__x86_indirect_thunk_bnd" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "bnd call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "bnd ret" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-4.c
new file mode 100644
index 0000000..c64d12e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-bnd-4.c
@@ -0,0 +1,20 @@
+/* { dg-do compile { target { *-*-linux* && { ! x32 } } } } */
+/* { dg-options "-O2 -mindirect-branch=thunk -fcheck-pointer-bounds -mmpx -fpic -fno-plt" } */
+
+void bar (char *);
+char buf[10];
+
+int
+foo (void)
+{
+  bar (buf);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*bar@GOT" } } */
+/* { dg-final { scan-assembler "bnd jmp\[ \t\]*__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler "bnd jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-times "bnd call\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler "bnd ret" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c
new file mode 100644
index 0000000..49f27b4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch;
+
+void
+male_indirect_jump (long offset)
+{
+  dispatch(offset);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c
new file mode 100644
index 0000000..a1e3eb6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch[256];
+
+void
+male_indirect_jump (long offset)
+{
+  dispatch[offset](offset);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c
new file mode 100644
index 0000000..395634e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch;
+
+int
+male_indirect_jump (long offset)
+{
+  dispatch(offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c
new file mode 100644
index 0000000..fd3f633
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch[256];
+
+int
+male_indirect_jump (long offset)
+{
+  dispatch[offset](offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-5.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-5.c
new file mode 100644
index 0000000..ba2f92b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-5.c
@@ -0,0 +1,16 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk-extern" } */
+
+extern void bar (void);
+
+void
+foo (void)
+{
+  bar ();
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*bar@GOT" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-6.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-6.c
new file mode 100644
index 0000000..0c5a2d4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-6.c
@@ -0,0 +1,17 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk-extern" } */
+
+extern void bar (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*bar@GOT" } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 1 } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 1 } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c
new file mode 100644
index 0000000..6652523
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c
@@ -0,0 +1,43 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+
+void func0 (void);
+void func1 (void);
+void func2 (void);
+void func3 (void);
+void func4 (void);
+void func4 (void);
+void func5 (void);
+
+void
+bar (int i)
+{
+  switch (i)
+    {
+    default:
+      func0 ();
+      break;
+    case 1:
+      func1 ();
+      break;
+    case 2:
+      func2 ();
+      break;
+    case 3:
+      func3 ();
+      break;
+    case 4:
+      func4 ();
+      break;
+    case 5:
+      func5 ();
+      break;
+    }
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target x32 } } } */
+/* { dg-final { scan-assembler-not {\t(lfence|pause)} } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c
new file mode 100644
index 0000000..68c0ff7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch;
+
+void
+male_indirect_jump (long offset)
+{
+  dispatch(offset);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c
new file mode 100644
index 0000000..e2da1fc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch[256];
+
+void
+male_indirect_jump (long offset)
+{
+  dispatch[offset](offset);
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c
new file mode 100644
index 0000000..244fec7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch;
+
+int
+male_indirect_jump (long offset)
+{
+  dispatch(offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c
new file mode 100644
index 0000000..107ebe3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+
+typedef void (*dispatch_t)(long offset);
+
+dispatch_t dispatch[256];
+
+int
+male_indirect_jump (long offset)
+{
+  dispatch[offset](offset);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-5.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-5.c
new file mode 100644
index 0000000..17b04ef
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-5.c
@@ -0,0 +1,17 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk-inline" } */
+
+extern void bar (void);
+
+void
+foo (void)
+{
+  bar ();
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*bar@GOT" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-6.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-6.c
new file mode 100644
index 0000000..d9eb112
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-6.c
@@ -0,0 +1,18 @@
+/* { dg-do compile { target *-*-linux* } } */
+/* { dg-options "-O2 -fpic -fno-plt -mindirect-branch=thunk-inline" } */
+
+extern void bar (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*bar@GOT" } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c
new file mode 100644
index 0000000..d02b1dc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c
@@ -0,0 +1,44 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+
+void func0 (void);
+void func1 (void);
+void func2 (void);
+void func3 (void);
+void func4 (void);
+void func4 (void);
+void func5 (void);
+
+void
+bar (int i)
+{
+  switch (i)
+    {
+    default:
+      func0 ();
+      break;
+    case 1:
+      func1 ();
+      break;
+    case 2:
+      func2 ();
+      break;
+    case 3:
+      func3 ();
+      break;
+    case 4:
+      func4 ();
+      break;
+    case 5:
+      func5 ();
+      break;
+    }
+}
+
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler {\tpause} } } */
+/* { dg-final { scan-assembler {\tlfence} } } */
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */