gdb/

	Fix entry-values if the callee called a noreturn function.
	* dwarf2-frame-tailcall.c (dwarf2_tailcall_sniffer_first): Use
	get_frame_address_in_block.  Add new comment.

gdb/testsuite/
	Fix entry-values if the callee called a noreturn function.
	* gdb.arch/amd64-tailcall-noret.S: New file.
	* gdb.arch/amd64-tailcall-noret.c: New file.
	* gdb.arch/amd64-tailcall-noret.exp: New file.

4 files changed, 783 insertions, 0 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 81421eb..7d57e7d 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,12 @@
 2013-03-10  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
+	Fix entry-values if the callee called a noreturn function.
+	* gdb.arch/amd64-tailcall-noret.S: New file.
+	* gdb.arch/amd64-tailcall-noret.c: New file.
+	* gdb.arch/amd64-tailcall-noret.exp: New file.
+
+2013-03-10  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
 	Fix entry-values in C++ across CUs.
 	* gdb.arch/amd64-tailcall-cxx.exp: New file.
 	* gdb.arch/amd64-tailcall-cxx1.S: New file.
diff --git a/gdb/testsuite/gdb.arch/amd64-tailcall-noret.S b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.S
new file mode 100644
index 0000000..25397e9
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.S
@@ -0,0 +1,694 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2013 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* This source file was generated by:
+   gcc -o gdb.arch/amd64-tailcall-noret.S gdb.arch/amd64-tailcall-noret.c -Wall -S -dA -O2 -g
+   */
+
+	.file	"amd64-tailcall-noret.c"
+	.text
+.Ltext0:
+	.section	.text.unlikely,"ax",@progbits
+	.type	noret, @function
+noret:
+.LFB9:
+	.file 1 "gdb.arch/amd64-tailcall-noret.c"
+	# gdb.arch/amd64-tailcall-noret.c:24
+	.loc 1 24 0
+	.cfi_startproc
+.LVL0:
+# BLOCK 2 freq:10000 seq:0
+# PRED: ENTRY [100.0%]  (fallthru)
+	pushq	%rax
+.LCFI0:
+	.cfi_def_cfa_offset 16
+	# gdb.arch/amd64-tailcall-noret.c:25
+	.loc 1 25 0
+	call	abort
+.LVL1:
+# SUCC:
+	.cfi_endproc
+.LFE9:
+	.size	noret, .-noret
+	.text
+	.p2align 4,,15
+	.type	mayret, @function
+mayret:
+.LFB10:
+	# gdb.arch/amd64-tailcall-noret.c:30
+	.loc 1 30 0
+	.cfi_startproc
+.LVL2:
+# BLOCK 2 freq:10000 seq:0
+# PRED: ENTRY [100.0%]  (fallthru)
+	# gdb.arch/amd64-tailcall-noret.c:31
+	.loc 1 31 0
+	movl	v(%rip), %eax
+	testl	%eax, %eax
+# SUCC: 4 [0.0%]  (can_fallthru) 3 [100.0%]  (fallthru,can_fallthru)
+	jne	.L8
+# BLOCK 3 freq:9996 seq:1
+# PRED: 2 [100.0%]  (fallthru,can_fallthru)
+# SUCC: EXIT [100.0%] 
+	rep
+	ret
+# BLOCK 4 freq:4 seq:2
+# PRED: 2 [0.0%]  (can_fallthru)
+.L8:
+	# gdb.arch/amd64-tailcall-noret.c:30
+	.loc 1 30 0
+	pushq	%rdx
+.LCFI1:
+	.cfi_def_cfa_offset 16
+	# gdb.arch/amd64-tailcall-noret.c:32
+	.loc 1 32 0
+	xorl	%eax, %eax
+	call	noret
+.LVL3:
+# SUCC:
+	.cfi_endproc
+.LFE10:
+	.size	mayret, .-mayret
+	.p2align 4,,15
+	.type	tailcall, @function
+tailcall:
+.LFB11:
+	# gdb.arch/amd64-tailcall-noret.c:37
+	.loc 1 37 0
+	.cfi_startproc
+.LVL4:
+# BLOCK 2 freq:10000 seq:0
+# PRED: ENTRY [100.0%]  (fallthru)
+	# gdb.arch/amd64-tailcall-noret.c:38
+	.loc 1 38 0
+	jmp	mayret
+.LVL5:
+# SUCC: EXIT [100.0%]  (ab,sibcall)
+	.cfi_endproc
+.LFE11:
+	.size	tailcall, .-tailcall
+	.section	.text.startup,"ax",@progbits
+	.p2align 4,,15
+	.globl	main
+	.type	main, @function
+main:
+.LFB12:
+	# gdb.arch/amd64-tailcall-noret.c:43
+	.loc 1 43 0
+	.cfi_startproc
+# BLOCK 2 freq:10000 seq:0
+# PRED: ENTRY [100.0%]  (fallthru)
+	subq	$8, %rsp
+.LCFI2:
+	.cfi_def_cfa_offset 16
+	# gdb.arch/amd64-tailcall-noret.c:44
+	.loc 1 44 0
+	movl	$1, %edi
+	call	tailcall
+.LVL6:
+	# gdb.arch/amd64-tailcall-noret.c:46
+	.loc 1 46 0
+	xorl	%eax, %eax
+	addq	$8, %rsp
+.LCFI3:
+	.cfi_def_cfa_offset 8
+# SUCC: EXIT [100.0%] 
+	ret
+	.cfi_endproc
+.LFE12:
+	.size	main, .-main
+	.globl	v
+	.data
+	.align 4
+	.type	v, @object
+	.size	v, 4
+v:
+	.long	1
+	.text
+.Letext0:
+	.file 2 "/usr/include/stdlib.h"
+	.section	.debug_info,"",@progbits
+.Ldebug_info0:
+	.long	0x19d	# Length of Compilation Unit Info
+	.value	0x2	# DWARF version number
+	.long	.Ldebug_abbrev0	# Offset Into Abbrev. Section
+	.byte	0x8	# Pointer Size (in bytes)
+	.uleb128 0x1	# (DIE (0xb) DW_TAG_compile_unit)
+	.long	.LASF14	# DW_AT_producer: "GNU C 4.7.3 20130221 (prerelease)"
+	.byte	0x1	# DW_AT_language
+	.long	.LASF15	# DW_AT_name: "gdb.arch/amd64-tailcall-noret.c"
+	.long	.LASF16	# DW_AT_comp_dir: ""
+	.long	.Ldebug_ranges0+0	# DW_AT_ranges
+	.quad	0	# DW_AT_low_pc
+	.quad	0	# DW_AT_entry_pc
+	.long	.Ldebug_line0	# DW_AT_stmt_list
+	.uleb128 0x2	# (DIE (0x31) DW_TAG_base_type)
+	.byte	0x8	# DW_AT_byte_size
+	.byte	0x7	# DW_AT_encoding
+	.long	.LASF0	# DW_AT_name: "long unsigned int"
+	.uleb128 0x3	# (DIE (0x38) DW_TAG_base_type)
+	.byte	0x4	# DW_AT_byte_size
+	.byte	0x5	# DW_AT_encoding
+	.ascii "int\0"	# DW_AT_name
+	.uleb128 0x2	# (DIE (0x3f) DW_TAG_base_type)
+	.byte	0x1	# DW_AT_byte_size
+	.byte	0x8	# DW_AT_encoding
+	.long	.LASF1	# DW_AT_name: "unsigned char"
+	.uleb128 0x2	# (DIE (0x46) DW_TAG_base_type)
+	.byte	0x2	# DW_AT_byte_size
+	.byte	0x7	# DW_AT_encoding
+	.long	.LASF2	# DW_AT_name: "short unsigned int"
+	.uleb128 0x2	# (DIE (0x4d) DW_TAG_base_type)
+	.byte	0x4	# DW_AT_byte_size
+	.byte	0x7	# DW_AT_encoding
+	.long	.LASF3	# DW_AT_name: "unsigned int"
+	.uleb128 0x2	# (DIE (0x54) DW_TAG_base_type)
+	.byte	0x1	# DW_AT_byte_size
+	.byte	0x6	# DW_AT_encoding
+	.long	.LASF4	# DW_AT_name: "signed char"
+	.uleb128 0x2	# (DIE (0x5b) DW_TAG_base_type)
+	.byte	0x2	# DW_AT_byte_size
+	.byte	0x5	# DW_AT_encoding
+	.long	.LASF5	# DW_AT_name: "short int"
+	.uleb128 0x2	# (DIE (0x62) DW_TAG_base_type)
+	.byte	0x8	# DW_AT_byte_size
+	.byte	0x5	# DW_AT_encoding
+	.long	.LASF6	# DW_AT_name: "long int"
+	.uleb128 0x2	# (DIE (0x69) DW_TAG_base_type)
+	.byte	0x8	# DW_AT_byte_size
+	.byte	0x7	# DW_AT_encoding
+	.long	.LASF7	# DW_AT_name: "sizetype"
+	.uleb128 0x2	# (DIE (0x70) DW_TAG_base_type)
+	.byte	0x1	# DW_AT_byte_size
+	.byte	0x6	# DW_AT_encoding
+	.long	.LASF8	# DW_AT_name: "char"
+	.uleb128 0x2	# (DIE (0x77) DW_TAG_base_type)
+	.byte	0x8	# DW_AT_byte_size
+	.byte	0x5	# DW_AT_encoding
+	.long	.LASF9	# DW_AT_name: "long long int"
+	.uleb128 0x2	# (DIE (0x7e) DW_TAG_base_type)
+	.byte	0x8	# DW_AT_byte_size
+	.byte	0x7	# DW_AT_encoding
+	.long	.LASF10	# DW_AT_name: "long long unsigned int"
+	.uleb128 0x4	# (DIE (0x85) DW_TAG_volatile_type)
+	.long	0x38	# DW_AT_type
+	.uleb128 0x5	# (DIE (0x8a) DW_TAG_subprogram)
+	.long	.LASF11	# DW_AT_name: "noret"
+	.byte	0x1	# DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c)
+	.byte	0x17	# DW_AT_decl_line
+	.byte	0x1	# DW_AT_prototyped
+	.quad	.LFB9	# DW_AT_low_pc
+	.quad	.LFE9	# DW_AT_high_pc
+	.long	.LLST0	# DW_AT_frame_base
+	.byte	0x1	# DW_AT_GNU_all_call_sites
+	.long	0xc7	# DW_AT_sibling
+	.uleb128 0x6	# (DIE (0xab) DW_TAG_formal_parameter)
+	.ascii "x\0"	# DW_AT_name
+	.byte	0x1	# DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c)
+	.byte	0x17	# DW_AT_decl_line
+	.long	0x38	# DW_AT_type
+	.long	.LLST1	# DW_AT_location
+	.uleb128 0x7	# (DIE (0xb8) DW_TAG_unspecified_parameters)
+	.uleb128 0x8	# (DIE (0xb9) DW_TAG_GNU_call_site)
+	.quad	.LVL1	# DW_AT_low_pc
+	.long	0x195	# DW_AT_abstract_origin
+	.byte	0	# end of children of DIE 0x8a
+	.uleb128 0x5	# (DIE (0xc7) DW_TAG_subprogram)
+	.long	.LASF12	# DW_AT_name: "mayret"
+	.byte	0x1	# DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c)
+	.byte	0x1d	# DW_AT_decl_line
+	.byte	0x1	# DW_AT_prototyped
+	.quad	.LFB10	# DW_AT_low_pc
+	.quad	.LFE10	# DW_AT_high_pc
+	.long	.LLST2	# DW_AT_frame_base
+	.byte	0x1	# DW_AT_GNU_all_call_sites
+	.long	0x103	# DW_AT_sibling
+	.uleb128 0x6	# (DIE (0xe8) DW_TAG_formal_parameter)
+	.ascii "x\0"	# DW_AT_name
+	.byte	0x1	# DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c)
+	.byte	0x1d	# DW_AT_decl_line
+	.long	0x38	# DW_AT_type
+	.long	.LLST3	# DW_AT_location
+	.uleb128 0x8	# (DIE (0xf5) DW_TAG_GNU_call_site)
+	.quad	.LVL3	# DW_AT_low_pc
+	.long	0x8a	# DW_AT_abstract_origin
+	.byte	0	# end of children of DIE 0xc7
+	.uleb128 0x9	# (DIE (0x103) DW_TAG_subprogram)
+	.long	.LASF13	# DW_AT_name: "tailcall"
+	.byte	0x1	# DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c)
+	.byte	0x24	# DW_AT_decl_line
+	.byte	0x1	# DW_AT_prototyped
+	.quad	.LFB11	# DW_AT_low_pc
+	.quad	.LFE11	# DW_AT_high_pc
+	.byte	0x2	# DW_AT_frame_base
+	.byte	0x77	# DW_OP_breg7
+	.sleb128 8
+	.byte	0x1	# DW_AT_GNU_all_call_sites
+	.long	0x147	# DW_AT_sibling
+	.uleb128 0x6	# (DIE (0x123) DW_TAG_formal_parameter)
+	.ascii "x\0"	# DW_AT_name
+	.byte	0x1	# DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c)
+	.byte	0x24	# DW_AT_decl_line
+	.long	0x38	# DW_AT_type
+	.long	.LLST4	# DW_AT_location
+	.uleb128 0xa	# (DIE (0x130) DW_TAG_GNU_call_site)
+	.quad	.LVL5	# DW_AT_low_pc
+	.byte	0x1	# DW_AT_GNU_tail_call
+	.long	0xc7	# DW_AT_abstract_origin
+	.uleb128 0xb	# (DIE (0x13e) DW_TAG_GNU_call_site_parameter)
+	.byte	0x1	# DW_AT_location
+	.byte	0x55	# DW_OP_reg5
+	.byte	0x3	# DW_AT_GNU_call_site_value
+	.byte	0xf3	# DW_OP_GNU_entry_value
+	.uleb128 0x1
+	.byte	0x55	# DW_OP_reg5
+	.byte	0	# end of children of DIE 0x130
+	.byte	0	# end of children of DIE 0x103
+	.uleb128 0xc	# (DIE (0x147) DW_TAG_subprogram)
+	.byte	0x1	# DW_AT_external
+	.long	.LASF17	# DW_AT_name: "main"
+	.byte	0x1	# DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c)
+	.byte	0x2a	# DW_AT_decl_line
+	.byte	0x1	# DW_AT_prototyped
+	.long	0x38	# DW_AT_type
+	.quad	.LFB12	# DW_AT_low_pc
+	.quad	.LFE12	# DW_AT_high_pc
+	.long	.LLST5	# DW_AT_frame_base
+	.byte	0x1	# DW_AT_GNU_all_call_sites
+	.long	0x181	# DW_AT_sibling
+	.uleb128 0xd	# (DIE (0x16d) DW_TAG_GNU_call_site)
+	.quad	.LVL6	# DW_AT_low_pc
+	.long	0x103	# DW_AT_abstract_origin
+	.uleb128 0xb	# (DIE (0x17a) DW_TAG_GNU_call_site_parameter)
+	.byte	0x1	# DW_AT_location
+	.byte	0x55	# DW_OP_reg5
+	.byte	0x1	# DW_AT_GNU_call_site_value
+	.byte	0x31	# DW_OP_lit1
+	.byte	0	# end of children of DIE 0x16d
+	.byte	0	# end of children of DIE 0x147
+	.uleb128 0xe	# (DIE (0x181) DW_TAG_variable)
+	.ascii "v\0"	# DW_AT_name
+	.byte	0x1	# DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c)
+	.byte	0x14	# DW_AT_decl_line
+	.long	0x85	# DW_AT_type
+	.byte	0x1	# DW_AT_external
+	.byte	0x9	# DW_AT_location
+	.byte	0x3	# DW_OP_addr
+	.quad	v
+	.uleb128 0xf	# (DIE (0x195) DW_TAG_subprogram)
+	.byte	0x1	# DW_AT_external
+	.long	.LASF18	# DW_AT_name: "abort"
+	.byte	0x2	# DW_AT_decl_file (/usr/include/stdlib.h)
+	.value	0x202	# DW_AT_decl_line
+	.byte	0x1	# DW_AT_prototyped
+	.byte	0x1	# DW_AT_declaration
+	.byte	0	# end of children of DIE 0xb
+	.section	.debug_abbrev,"",@progbits
+.Ldebug_abbrev0:
+	.uleb128 0x1	# (abbrev code)
+	.uleb128 0x11	# (TAG: DW_TAG_compile_unit)
+	.byte	0x1	# DW_children_yes
+	.uleb128 0x25	# (DW_AT_producer)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.uleb128 0x13	# (DW_AT_language)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.uleb128 0x1b	# (DW_AT_comp_dir)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.uleb128 0x55	# (DW_AT_ranges)
+	.uleb128 0x6	# (DW_FORM_data4)
+	.uleb128 0x11	# (DW_AT_low_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x52	# (DW_AT_entry_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x10	# (DW_AT_stmt_list)
+	.uleb128 0x6	# (DW_FORM_data4)
+	.byte	0
+	.byte	0
+	.uleb128 0x2	# (abbrev code)
+	.uleb128 0x24	# (TAG: DW_TAG_base_type)
+	.byte	0	# DW_children_no
+	.uleb128 0xb	# (DW_AT_byte_size)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3e	# (DW_AT_encoding)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.byte	0
+	.byte	0
+	.uleb128 0x3	# (abbrev code)
+	.uleb128 0x24	# (TAG: DW_TAG_base_type)
+	.byte	0	# DW_children_no
+	.uleb128 0xb	# (DW_AT_byte_size)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3e	# (DW_AT_encoding)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0x8	# (DW_FORM_string)
+	.byte	0
+	.byte	0
+	.uleb128 0x4	# (abbrev code)
+	.uleb128 0x35	# (TAG: DW_TAG_volatile_type)
+	.byte	0	# DW_children_no
+	.uleb128 0x49	# (DW_AT_type)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0x5	# (abbrev code)
+	.uleb128 0x2e	# (TAG: DW_TAG_subprogram)
+	.byte	0x1	# DW_children_yes
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.uleb128 0x3a	# (DW_AT_decl_file)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3b	# (DW_AT_decl_line)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x27	# (DW_AT_prototyped)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x11	# (DW_AT_low_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x12	# (DW_AT_high_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x40	# (DW_AT_frame_base)
+	.uleb128 0x6	# (DW_FORM_data4)
+	.uleb128 0x2117	# (DW_AT_GNU_all_call_sites)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x1	# (DW_AT_sibling)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0x6	# (abbrev code)
+	.uleb128 0x5	# (TAG: DW_TAG_formal_parameter)
+	.byte	0	# DW_children_no
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0x8	# (DW_FORM_string)
+	.uleb128 0x3a	# (DW_AT_decl_file)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3b	# (DW_AT_decl_line)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x49	# (DW_AT_type)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.uleb128 0x2	# (DW_AT_location)
+	.uleb128 0x6	# (DW_FORM_data4)
+	.byte	0
+	.byte	0
+	.uleb128 0x7	# (abbrev code)
+	.uleb128 0x18	# (TAG: DW_TAG_unspecified_parameters)
+	.byte	0	# DW_children_no
+	.byte	0
+	.byte	0
+	.uleb128 0x8	# (abbrev code)
+	.uleb128 0x4109	# (TAG: DW_TAG_GNU_call_site)
+	.byte	0	# DW_children_no
+	.uleb128 0x11	# (DW_AT_low_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x31	# (DW_AT_abstract_origin)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0x9	# (abbrev code)
+	.uleb128 0x2e	# (TAG: DW_TAG_subprogram)
+	.byte	0x1	# DW_children_yes
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.uleb128 0x3a	# (DW_AT_decl_file)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3b	# (DW_AT_decl_line)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x27	# (DW_AT_prototyped)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x11	# (DW_AT_low_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x12	# (DW_AT_high_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x40	# (DW_AT_frame_base)
+	.uleb128 0xa	# (DW_FORM_block1)
+	.uleb128 0x2117	# (DW_AT_GNU_all_call_sites)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x1	# (DW_AT_sibling)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0xa	# (abbrev code)
+	.uleb128 0x4109	# (TAG: DW_TAG_GNU_call_site)
+	.byte	0x1	# DW_children_yes
+	.uleb128 0x11	# (DW_AT_low_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x2115	# (DW_AT_GNU_tail_call)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x31	# (DW_AT_abstract_origin)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0xb	# (abbrev code)
+	.uleb128 0x410a	# (TAG: DW_TAG_GNU_call_site_parameter)
+	.byte	0	# DW_children_no
+	.uleb128 0x2	# (DW_AT_location)
+	.uleb128 0xa	# (DW_FORM_block1)
+	.uleb128 0x2111	# (DW_AT_GNU_call_site_value)
+	.uleb128 0xa	# (DW_FORM_block1)
+	.byte	0
+	.byte	0
+	.uleb128 0xc	# (abbrev code)
+	.uleb128 0x2e	# (TAG: DW_TAG_subprogram)
+	.byte	0x1	# DW_children_yes
+	.uleb128 0x3f	# (DW_AT_external)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.uleb128 0x3a	# (DW_AT_decl_file)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3b	# (DW_AT_decl_line)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x27	# (DW_AT_prototyped)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x49	# (DW_AT_type)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.uleb128 0x11	# (DW_AT_low_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x12	# (DW_AT_high_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x40	# (DW_AT_frame_base)
+	.uleb128 0x6	# (DW_FORM_data4)
+	.uleb128 0x2117	# (DW_AT_GNU_all_call_sites)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x1	# (DW_AT_sibling)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0xd	# (abbrev code)
+	.uleb128 0x4109	# (TAG: DW_TAG_GNU_call_site)
+	.byte	0x1	# DW_children_yes
+	.uleb128 0x11	# (DW_AT_low_pc)
+	.uleb128 0x1	# (DW_FORM_addr)
+	.uleb128 0x31	# (DW_AT_abstract_origin)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.byte	0
+	.byte	0
+	.uleb128 0xe	# (abbrev code)
+	.uleb128 0x34	# (TAG: DW_TAG_variable)
+	.byte	0	# DW_children_no
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0x8	# (DW_FORM_string)
+	.uleb128 0x3a	# (DW_AT_decl_file)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3b	# (DW_AT_decl_line)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x49	# (DW_AT_type)
+	.uleb128 0x13	# (DW_FORM_ref4)
+	.uleb128 0x3f	# (DW_AT_external)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x2	# (DW_AT_location)
+	.uleb128 0xa	# (DW_FORM_block1)
+	.byte	0
+	.byte	0
+	.uleb128 0xf	# (abbrev code)
+	.uleb128 0x2e	# (TAG: DW_TAG_subprogram)
+	.byte	0	# DW_children_no
+	.uleb128 0x3f	# (DW_AT_external)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x3	# (DW_AT_name)
+	.uleb128 0xe	# (DW_FORM_strp)
+	.uleb128 0x3a	# (DW_AT_decl_file)
+	.uleb128 0xb	# (DW_FORM_data1)
+	.uleb128 0x3b	# (DW_AT_decl_line)
+	.uleb128 0x5	# (DW_FORM_data2)
+	.uleb128 0x27	# (DW_AT_prototyped)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.uleb128 0x3c	# (DW_AT_declaration)
+	.uleb128 0xc	# (DW_FORM_flag)
+	.byte	0
+	.byte	0
+	.byte	0
+	.section	.debug_loc,"",@progbits
+.Ldebug_loc0:
+.LLST0:
+	.quad	.LFB9	# Location list begin address (*.LLST0)
+	.quad	.LCFI0	# Location list end address (*.LLST0)
+	.value	0x2	# Location expression size
+	.byte	0x77	# DW_OP_breg7
+	.sleb128 8
+	.quad	.LCFI0	# Location list begin address (*.LLST0)
+	.quad	.LFE9	# Location list end address (*.LLST0)
+	.value	0x2	# Location expression size
+	.byte	0x77	# DW_OP_breg7
+	.sleb128 16
+	.quad	0	# Location list terminator begin (*.LLST0)
+	.quad	0	# Location list terminator end (*.LLST0)
+.LLST1:
+	.quad	.LVL0	# Location list begin address (*.LLST1)
+	.quad	.LVL1-1	# Location list end address (*.LLST1)
+	.value	0x1	# Location expression size
+	.byte	0x55	# DW_OP_reg5
+	.quad	.LVL1-1	# Location list begin address (*.LLST1)
+	.quad	.LFE9	# Location list end address (*.LLST1)
+	.value	0x4	# Location expression size
+	.byte	0xf3	# DW_OP_GNU_entry_value
+	.uleb128 0x1
+	.byte	0x55	# DW_OP_reg5
+	.byte	0x9f	# DW_OP_stack_value
+	.quad	0	# Location list terminator begin (*.LLST1)
+	.quad	0	# Location list terminator end (*.LLST1)
+.LLST2:
+	.quad	.LFB10	# Location list begin address (*.LLST2)
+	.quad	.LCFI1	# Location list end address (*.LLST2)
+	.value	0x2	# Location expression size
+	.byte	0x77	# DW_OP_breg7
+	.sleb128 8
+	.quad	.LCFI1	# Location list begin address (*.LLST2)
+	.quad	.LFE10	# Location list end address (*.LLST2)
+	.value	0x2	# Location expression size
+	.byte	0x77	# DW_OP_breg7
+	.sleb128 16
+	.quad	0	# Location list terminator begin (*.LLST2)
+	.quad	0	# Location list terminator end (*.LLST2)
+.LLST3:
+	.quad	.LVL2	# Location list begin address (*.LLST3)
+	.quad	.LVL3-1	# Location list end address (*.LLST3)
+	.value	0x1	# Location expression size
+	.byte	0x55	# DW_OP_reg5
+	.quad	.LVL3-1	# Location list begin address (*.LLST3)
+	.quad	.LFE10	# Location list end address (*.LLST3)
+	.value	0x4	# Location expression size
+	.byte	0xf3	# DW_OP_GNU_entry_value
+	.uleb128 0x1
+	.byte	0x55	# DW_OP_reg5
+	.byte	0x9f	# DW_OP_stack_value
+	.quad	0	# Location list terminator begin (*.LLST3)
+	.quad	0	# Location list terminator end (*.LLST3)
+.LLST4:
+	.quad	.LVL4	# Location list begin address (*.LLST4)
+	.quad	.LVL5-1	# Location list end address (*.LLST4)
+	.value	0x1	# Location expression size
+	.byte	0x55	# DW_OP_reg5
+	.quad	.LVL5-1	# Location list begin address (*.LLST4)
+	.quad	.LFE11	# Location list end address (*.LLST4)
+	.value	0x4	# Location expression size
+	.byte	0xf3	# DW_OP_GNU_entry_value
+	.uleb128 0x1
+	.byte	0x55	# DW_OP_reg5
+	.byte	0x9f	# DW_OP_stack_value
+	.quad	0	# Location list terminator begin (*.LLST4)
+	.quad	0	# Location list terminator end (*.LLST4)
+.LLST5:
+	.quad	.LFB12	# Location list begin address (*.LLST5)
+	.quad	.LCFI2	# Location list end address (*.LLST5)
+	.value	0x2	# Location expression size
+	.byte	0x77	# DW_OP_breg7
+	.sleb128 8
+	.quad	.LCFI2	# Location list begin address (*.LLST5)
+	.quad	.LCFI3	# Location list end address (*.LLST5)
+	.value	0x2	# Location expression size
+	.byte	0x77	# DW_OP_breg7
+	.sleb128 16
+	.quad	.LCFI3	# Location list begin address (*.LLST5)
+	.quad	.LFE12	# Location list end address (*.LLST5)
+	.value	0x2	# Location expression size
+	.byte	0x77	# DW_OP_breg7
+	.sleb128 8
+	.quad	0	# Location list terminator begin (*.LLST5)
+	.quad	0	# Location list terminator end (*.LLST5)
+	.section	.debug_aranges,"",@progbits
+	.long	0x4c	# Length of Address Ranges Info
+	.value	0x2	# DWARF Version
+	.long	.Ldebug_info0	# Offset of Compilation Unit Info
+	.byte	0x8	# Size of Address
+	.byte	0	# Size of Segment Descriptor
+	.value	0	# Pad to 16 byte boundary
+	.value	0
+	.quad	.Ltext0	# Address
+	.quad	.Letext0-.Ltext0	# Length
+	.quad	.LFB9	# Address
+	.quad	.LFE9-.LFB9	# Length
+	.quad	.LFB12	# Address
+	.quad	.LFE12-.LFB12	# Length
+	.quad	0
+	.quad	0
+	.section	.debug_ranges,"",@progbits
+.Ldebug_ranges0:
+	.quad	.Ltext0	# Offset 0
+	.quad	.Letext0
+	.quad	.LFB9	# Offset 0x10
+	.quad	.LFE9
+	.quad	.LFB12	# Offset 0x20
+	.quad	.LFE12
+	.quad	0
+	.quad	0
+	.section	.debug_line,"",@progbits
+.Ldebug_line0:
+	.section	.debug_str,"MS",@progbits,1
+.LASF9:
+	.string	"long long int"
+.LASF14:
+	.string	"GNU C 4.7.3 20130221 (prerelease)"
+.LASF3:
+	.string	"unsigned int"
+.LASF17:
+	.string	"main"
+.LASF0:
+	.string	"long unsigned int"
+.LASF10:
+	.string	"long long unsigned int"
+.LASF16:
+	.string	""
+.LASF13:
+	.string	"tailcall"
+.LASF1:
+	.string	"unsigned char"
+.LASF8:
+	.string	"char"
+.LASF6:
+	.string	"long int"
+.LASF11:
+	.string	"noret"
+.LASF2:
+	.string	"short unsigned int"
+.LASF4:
+	.string	"signed char"
+.LASF12:
+	.string	"mayret"
+.LASF18:
+	.string	"abort"
+.LASF5:
+	.string	"short int"
+.LASF7:
+	.string	"sizetype"
+.LASF15:
+	.string	"gdb.arch/amd64-tailcall-noret.c"
+	.ident	"GCC: (GNU) 4.7.3 20130221 (prerelease)"
+	.section	.note.GNU-stack,"",@progbits
diff --git a/gdb/testsuite/gdb.arch/amd64-tailcall-noret.c b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.c
new file mode 100644
index 0000000..6a84c76
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.c
@@ -0,0 +1,46 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2013 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+
+volatile int v = 1;
+
+static __attribute__ ((noinline, noclone, noreturn)) void
+noret (int x, ...)
+{
+  abort ();
+}
+
+static __attribute__ ((noinline, noclone)) void
+mayret (int x)
+{
+  if (v)
+    noret (x);
+}
+
+static __attribute__ ((noinline, noclone)) void
+tailcall (int x)
+{
+  mayret (x);
+}
+
+int
+main (void)
+{
+  tailcall (1);
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.arch/amd64-tailcall-noret.exp b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.exp
new file mode 100644
index 0000000..cd15596
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.exp
@@ -0,0 +1,36 @@
+# Copyright (C) 2012-2013 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set opts {}
+standard_testfile .S
+
+if [info exists COMPILE] {
+    # make check RUNTESTFLAGS="gdb.arch/amd64-tailcall-noret.exp COMPILE=1"
+    standard_testfile
+    lappend opts debug optimize=-O2
+} elseif { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
+    verbose "Skipping ${testfile}."
+    return
+}
+
+if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} $opts] } {
+    return -1
+}
+
+if ![runto noret] {
+    return -1
+}
+
+gdb_test "bt" "#0 +noret \\(x=1\\) at \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in mayret \\(x=x@entry=1\\) at \[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in tailcall \\(x=x@entry=1\\) at \[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in main \\(\\) at .*"