commit 2ad2b4c4d8f0776012d36f1f3ae17c5fef55c7f9
Author: root <root@lenovo-x3950-01.khw.lab.eng.bos.redhat.com>
Date:   Thu Jan 18 17:43:15 2018 -0500

    HJ's patch #2

diff --git a/gcc/config/i386/i386-protos.h b/gcc/config/i386/i386-protos.h
index ecdf108..4e4b210 100644
--- a/gcc/config/i386/i386-protos.h
+++ b/gcc/config/i386/i386-protos.h
@@ -307,6 +307,7 @@ extern enum attr_cpu ix86_schedule;
 
 extern const char * ix86_output_call_insn (rtx insn, rtx call_op);
 extern const char * ix86_output_indirect_jmp (rtx call_op, bool ret_p);
+extern const char * ix86_output_function_return (bool long_p);
 
 #ifdef RTX_CODE
 /* Target data for multipass lookahead scheduling.
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index ebc9a90..9dffd02f 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4635,6 +4635,31 @@ ix86_set_indirect_branch_type (tree fndecl)
       else
 	cfun->machine->indirect_branch_type = ix86_indirect_branch;
     }
+
+  if (cfun->machine->function_return_type == indirect_branch_unset)
+    {
+      tree attr = lookup_attribute ("function_return",
+				    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->function_return_type = indirect_branch_keep;
+	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk") == 0)
+	    cfun->machine->function_return_type = indirect_branch_thunk;
+	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-inline") == 0)
+	    cfun->machine->function_return_type = indirect_branch_thunk_inline;
+	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-extern") == 0)
+	    cfun->machine->function_return_type = indirect_branch_thunk_extern;
+	  else
+	    gcc_unreachable ();
+	}
+      else
+	cfun->machine->function_return_type = ix86_function_return;
+    }
 }
 
 /* Remember the last target of ix86_set_current_function.  */
@@ -8733,8 +8758,11 @@ static int indirect_thunks_used;
 /* Fills in the label name that should be used for the indirect thunk.  */
 
 static void
-indirect_thunk_name (char name[32], int regno)
+indirect_thunk_name (char name[32], int regno, bool ret_p)
 {
+  if (regno >= 0 && ret_p)
+    gcc_unreachable ();
+
   if (USE_HIDDEN_LINKONCE)
     {
       if (regno >= 0)
@@ -8748,14 +8776,22 @@ indirect_thunk_name (char name[32], int regno)
 		   reg_prefix, reg_names[regno]);
 	}
       else
-	sprintf (name, "__x86_indirect_thunk");
+	{
+	  const char *ret = ret_p ? "return" : "indirect";
+	  sprintf (name, "__x86_%s_thunk", ret);
+	}
     }
   else
     {
       if (regno >= 0)
 	ASM_GENERATE_INTERNAL_LABEL (name, "LITR", regno);
       else
-	ASM_GENERATE_INTERNAL_LABEL (name, "LIT", 0);
+	{
+	  if (ret_p)
+	    ASM_GENERATE_INTERNAL_LABEL (name, "LRT", 0);
+	  else
+	    ASM_GENERATE_INTERNAL_LABEL (name, "LIT", 0);
+	}
     }
 }
 
@@ -8841,7 +8877,7 @@ output_indirect_thunk_function (int regno)
   tree decl;
 
   /* Create __x86_indirect_thunk.  */
-  indirect_thunk_name (name, regno);
+  indirect_thunk_name (name, regno, false);
   decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL,
 		     get_identifier (name),
 		     build_function_type_list (void_type_node, NULL_TREE));
@@ -8885,6 +8921,36 @@ output_indirect_thunk_function (int regno)
 	ASM_OUTPUT_LABEL (asm_out_file, name);
       }
 
+  if (regno < 0)
+    {
+      /* Create alias for __x86.return_thunk/__x86.return_thunk_bnd.  */
+      char alias[32];
+
+      indirect_thunk_name (alias, regno, true);
+#if TARGET_MACHO
+      if (TARGET_MACHO)
+	{
+	  fputs ("\t.weak_definition\t", asm_out_file);
+	  assemble_name (asm_out_file, alias);
+	  fputs ("\n\t.private_extern\t", asm_out_file);
+	  assemble_name (asm_out_file, alias);
+	  putc ('\n', asm_out_file);
+	  ASM_OUTPUT_LABEL (asm_out_file, alias);
+	}
+#else
+      ASM_OUTPUT_DEF (asm_out_file, alias, name);
+      if (USE_HIDDEN_LINKONCE)
+	{
+	  fputs ("\t.globl\t", asm_out_file);
+	  assemble_name (asm_out_file, alias);
+	  putc ('\n', asm_out_file);
+	  fputs ("\t.hidden\t", asm_out_file);
+	  assemble_name (asm_out_file, alias);
+	  putc ('\n', asm_out_file);
+	}
+#endif
+    }
+
   DECL_INITIAL (decl) = make_node (BLOCK);
   current_function_decl = decl;
   allocate_struct_function (decl, false);
@@ -24353,7 +24419,7 @@ ix86_output_indirect_branch_via_reg (rtx call_op, bool sibcall_p)
 	    i -= (FIRST_REX_INT_REG - LAST_INT_REG - 1);
 	  indirect_thunks_used |= 1 << i;
 	}
-      indirect_thunk_name (thunk_name_buf, regno);
+      indirect_thunk_name (thunk_name_buf, regno, false);
       thunk_name = thunk_name_buf;
     }
   else
@@ -24437,7 +24503,7 @@ ix86_output_indirect_branch_via_push (rtx call_op, const char *xasm,
     {
       if (cfun->machine->indirect_branch_type == indirect_branch_thunk)
 	indirect_thunk_needed = true;
-      indirect_thunk_name (thunk_name_buf, regno);
+      indirect_thunk_name (thunk_name_buf, regno, false);
       thunk_name = thunk_name_buf;
     }
   else
@@ -24559,6 +24625,37 @@ ix86_output_indirect_jmp (rtx call_op, bool ret_p)
     return "jmp\t%A0";
 }
 
+/* Output function return.  CALL_OP is the jump target.  Add a REP
+   prefix to RET if LONG_P is true and function return is kept.  */
+
+const char *
+ix86_output_function_return (bool long_p)
+{
+  if (cfun->machine->function_return_type != indirect_branch_keep)
+    {
+      char thunk_name[32];
+
+      if (cfun->machine->function_return_type
+	  != indirect_branch_thunk_inline)
+	{
+	  bool need_thunk = (cfun->machine->function_return_type
+			     == indirect_branch_thunk);
+	  indirect_thunk_name (thunk_name, -1, true);
+	  indirect_thunk_needed |= need_thunk;
+	  fprintf (asm_out_file, "\tjmp\t%s\n", thunk_name);
+	}
+      else
+	output_indirect_thunk (-1);
+
+      return "";
+    }
+
+  if (!long_p)
+    return "ret";
+
+  return "rep%; ret";
+}
+
 /* Output the assembly for a call instruction.  */
 
 const char *
@@ -35972,6 +36069,28 @@ ix86_handle_fndecl_attribute (tree *node, tree name,
 	}
     }
 
+  if (is_attribute_p ("function_return", 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;
 }
 
@@ -39492,6 +39611,9 @@ static const struct attribute_spec ix86_attribute_table[] =
     ix86_handle_callee_pop_aggregate_return, true },
   { "indirect_branch", 1, 1, true, false, false,
     ix86_handle_fndecl_attribute, false },
+  { "function_return", 1, 1, true, false, false,
+    ix86_handle_fndecl_attribute, false },
+
   /* End element.  */
   { NULL,        0, 0, false, false, false, NULL, false }
 };
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 8183cee7..8ff7026 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -2329,6 +2329,9 @@ struct GTY(()) machine_function {
      "indirect_jump" or "tablejump".  */
   BOOL_BITFIELD has_local_indirect_jump : 1;
 
+  /* How to generate function return.  */
+  ENUM_BITFIELD(indirect_branch) function_return_type : 3;
+
   /* During prologue/epilogue generation, the current frame state.
      Otherwise, the frame state at the end of the prologue.  */
   struct machine_frame_state fs;
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index b943849..ef16cf5 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -11749,7 +11749,7 @@
 (define_insn "simple_return_internal"
   [(simple_return)]
   "reload_completed"
-  "ret"
+  "* return ix86_output_function_return (false);"
   [(set_attr "length" "1")
    (set_attr "atom_unit" "jeu")
    (set_attr "length_immediate" "0")
@@ -11762,7 +11762,7 @@
   [(simple_return)
    (unspec [(const_int 0)] UNSPEC_REP)]
   "reload_completed"
-  "rep%; ret"
+  "* return ix86_output_function_return (true);"
   [(set_attr "length" "2")
    (set_attr "atom_unit" "jeu")
    (set_attr "length_immediate" "0")
diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt
index 0f6965a..9dfa2cb 100644
--- a/gcc/config/i386/i386.opt
+++ b/gcc/config/i386/i386.opt
@@ -635,9 +635,13 @@ 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.
 
+mfunction-return=
+Target Report RejectNegative Joined Enum(indirect_branch) Var(ix86_function_return) Init(indirect_branch_keep)
+Convert function return to call and return thunk.
+
 Enum
 Name(indirect_branch) Type(enum indirect_branch)
-Known indirect branch choices (for use with the -mindirect-branch= option):
+Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
 
 EnumValue
 Enum(indirect_branch) String(keep) Value(indirect_branch_keep)
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 847991c..add4f18 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -3821,6 +3821,15 @@ 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 function_return("@var{choice}")
+@cindex @code{function_return} function attribute, x86
+On x86 targets, the @code{function_return} attribute causes the compiler
+to convert function return with @var{choice}.  @samp{keep} keeps function
+return unmodified.  @samp{thunk} converts function return to call and
+return thunk.  @samp{thunk-inline} converts function return to inlined
+call and return thunk.  @samp{thunk-extern} converts function return to
+external call and return thunk provided in a separate object file.
 @end table
 
 On the PowerPC, the following options are allowed:
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b299fbf..5acd23a 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -658,7 +658,7 @@ Objective-C and Objective-C++ Dialects}.
 -m32 -m64 -mx32 -mlarge-data-threshold=@var{num} @gol
 -msse2avx -mfentry -m8bit-idiv @gol
 -mavx256-split-unaligned-load -mavx256-split-unaligned-store @gol
--mindirect-branch=@var{choice}}
+-mindirect-branch=@var{choice} -mfunction-return==@var{choice}}
 
 @emph{i386 and x86-64 Windows Options}
 @gccoptlist{-mconsole -mcygwin -mno-cygwin -mdll @gol
@@ -14658,6 +14658,17 @@ 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}.
 
+@item -mfunction-return=@var{choice}
+@opindex -mfunction-return
+Convert function return with @var{choice}.  The default is @samp{keep},
+which keeps function return unmodified.  @samp{thunk} converts function
+return to call and return thunk.  @samp{thunk-inline} converts function
+return to inlined call and return thunk.  @samp{thunk-extern} converts
+function return 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{function_return}.
+@xref{Function Attributes}.
+
 @end table
 
 These @samp{-m} switches are supported in addition to the above
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c
index 87f6dae..034b4cc 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c
index 6bc4f0a..e0c57cb 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c
index f20d35c..3c0d4c3 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c
index 0eff8fb..14d4ef6 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c
index afdb600..bc6b47a 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
@@ -35,7 +35,7 @@ bar (int i)
     }
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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" } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c
index efccdec..7c45142 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c
index ca3814e..9eebc84 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c
index 97744d6..f938db0 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -14,7 +14,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler {\tpause} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c
index bfce3ea..4e58599 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -13,7 +13,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 2 } } */
 /* { dg-final { scan-assembler {\tpause} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c
index 0833606..b8d5024 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-5.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -14,7 +14,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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 } } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c
index 2eba0fb..455adab 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-6.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -13,7 +13,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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 } } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c
index f58427e..4595b84 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
@@ -36,7 +36,7 @@ bar (int i)
     }
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c
index 564ed39..d730d31 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-8.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c
index 7fd01d6..f424181 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c
index 825f6b2..ac54868 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c
index 395634e..06ebf1c 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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 } } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c
index fd3f633..1c8f944 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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 } } } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c
index 6652523..86e9fd1 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-extern -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
@@ -35,7 +35,7 @@ bar (int i)
     }
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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)} } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c
index 48c4dd4..4117a35 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c
index 355dad5..650d55c 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c
index 244fec7..9540996 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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 } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c
index 107ebe3..f3db6e2 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 typedef void (*dispatch_t)(long offset);
 
@@ -12,7 +12,7 @@ male_indirect_jump (long offset)
   return 0;
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?dispatch" { target { { ! x32 } && *-*-linux* } } } } */
 /* { 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 } } */
diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c
index d02b1dc..764a375 100644
--- a/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c
+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mindirect-branch=thunk-inline -fno-pic" } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
 
 void func0 (void);
 void func1 (void);
@@ -35,7 +35,7 @@ bar (int i)
     }
 }
 
-/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*\.L\[0-9\]+\\(,%" { target { { ! x32 } && *-*-linux* } } } } */
 /* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
 /* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
 /* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-1.c b/gcc/testsuite/gcc.target/i386/ret-thunk-1.c
new file mode 100644
index 0000000..7223f67
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-1.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk" } */
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_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/ret-thunk-10.c b/gcc/testsuite/gcc.target/i386/ret-thunk-10.c
new file mode 100644
index 0000000..3a6727b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-10.c
@@ -0,0 +1,23 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-inline -mindirect-branch=thunk -fno-pic" } */
+
+extern void (*bar) (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-times {\tpause} 2 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 2 } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } }  } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk:" { target { ! x32 } }  } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } }  } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk_(r|e)ax:" { target { x32 } }  } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-11.c b/gcc/testsuite/gcc.target/i386/ret-thunk-11.c
new file mode 100644
index 0000000..b8f6818
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-11.c
@@ -0,0 +1,23 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-extern -mindirect-branch=thunk -fno-pic" } */
+
+extern void (*bar) (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk:" { target { ! x32 } }  } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } }  } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk_(r|e)ax:" { target { x32 } }  } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-12.c b/gcc/testsuite/gcc.target/i386/ret-thunk-12.c
new file mode 100644
index 0000000..01b0a02
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-12.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk -fno-pic" } */
+
+extern void (*bar) (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk:" { target { ! x32 } }  } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } }  } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk_(r|e)ax:" { target { x32 } }  } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-13.c b/gcc/testsuite/gcc.target/i386/ret-thunk-13.c
new file mode 100644
index 0000000..4b497b5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-13.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-inline -fno-pic" } */
+
+extern void (*bar) (void);
+extern int foo (void) __attribute__ ((function_return("thunk")));
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler-times {\tpause} 2 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 2 } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler-times "jmp\[ \t\]*\.LIND" 3 } } */
+/* { dg-final { scan-assembler-times "call\[ \t\]*\.LIND" 3 } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } }  } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-14.c b/gcc/testsuite/gcc.target/i386/ret-thunk-14.c
new file mode 100644
index 0000000..4ae4c44
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-14.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=thunk-extern -fno-pic" } */
+
+extern void (*bar) (void);
+
+__attribute__ ((function_return("thunk-inline")))
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { 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 "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-15.c b/gcc/testsuite/gcc.target/i386/ret-thunk-15.c
new file mode 100644
index 0000000..5b5bc76
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-15.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=keep -fno-pic" } */
+
+extern void (*bar) (void);
+
+__attribute__ ((function_return("thunk-extern"), indirect_branch("thunk")))
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { 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 "pushq\[ \t\]%rax" { target x32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-16.c b/gcc/testsuite/gcc.target/i386/ret-thunk-16.c
new file mode 100644
index 0000000..a16cad1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-16.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-inline -mindirect-branch=thunk-extern -fno-pic" } */
+
+extern void (*bar) (void);
+
+__attribute__ ((function_return("keep"), indirect_branch("keep")))
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler-not "__x86_indirect_thunk" } } */
+/* { dg-final { scan-assembler-not "__x86_return_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/ret-thunk-2.c b/gcc/testsuite/gcc.target/i386/ret-thunk-2.c
new file mode 100644
index 0000000..c6659e3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-2.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-inline" } */
+
+void
+foo (void)
+{
+}
+
+/* { 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 "jmp\[ \t\]*__x86_return_thunk" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-3.c b/gcc/testsuite/gcc.target/i386/ret-thunk-3.c
new file mode 100644
index 0000000..0f7f388
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-3.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-extern" } */
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_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/ret-thunk-4.c b/gcc/testsuite/gcc.target/i386/ret-thunk-4.c
new file mode 100644
index 0000000..9ae37e8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-4.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep" } */
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_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/ret-thunk-5.c b/gcc/testsuite/gcc.target/i386/ret-thunk-5.c
new file mode 100644
index 0000000..4bd0d2a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-5.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep" } */
+
+extern void foo (void) __attribute__ ((function_return("thunk")));
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_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/ret-thunk-6.c b/gcc/testsuite/gcc.target/i386/ret-thunk-6.c
new file mode 100644
index 0000000..053841f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-6.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep" } */
+
+__attribute__ ((function_return("thunk-inline")))
+void
+foo (void)
+{
+}
+
+/* { 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 "jmp\[ \t\]*__x86_return_thunk" } } */
diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-7.c b/gcc/testsuite/gcc.target/i386/ret-thunk-7.c
new file mode 100644
index 0000000..262e678
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-7.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=keep" } */
+
+__attribute__ ((function_return("thunk-extern")))
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_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/ret-thunk-8.c b/gcc/testsuite/gcc.target/i386/ret-thunk-8.c
new file mode 100644
index 0000000..c1658e9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-8.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk-inline" } */
+
+extern void foo (void) __attribute__ ((function_return("keep")));
+
+void
+foo (void)
+{
+}
+
+/* { dg-final { scan-assembler-not "jmp\[ \t\]*__x86_return_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/ret-thunk-9.c b/gcc/testsuite/gcc.target/i386/ret-thunk-9.c
new file mode 100644
index 0000000..fa24a1f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-9.c
@@ -0,0 +1,24 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mfunction-return=thunk -mindirect-branch=thunk -fno-pic" } */
+
+extern void (*bar) (void);
+
+int
+foo (void)
+{
+  bar ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_return_thunk" } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "call\[ \t\]*\.LIND" } } */
+/* { dg-final { scan-assembler "__x86_indirect_thunk:" } } */
+/* { dg-final { scan-assembler-times {\tpause} 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times {\tlfence} 1 { target { ! x32 } } } } */
+/* { dg-final { scan-assembler "push(?:l|q)\[ \t\]*_?bar" { target { { ! x32 } && *-*-linux* } } } } */
+/* { dg-final { scan-assembler "jmp\[ \t\]*__x86_indirect_thunk" { target { ! x32 } } } } */
+/* { dg-final { scan-assembler-times {\tpause} 2 { target { x32 } } } } */
+/* { dg-final { scan-assembler-times {\tlfence} 2 { target { x32 } } } } */
+/* { dg-final { scan-assembler "call\[ \t\]*__x86_indirect_thunk_(r|e)ax" { target { x32 } } } } */
+/* { dg-final { scan-assembler-not "pushq\[ \t\]%rax" { target x32 } } } */