re PR target/77957 (Undefined .LCTOC0 with -fstack-protector-strong -mminimal-toc -O0 on ppc64)

	PR target/77957
	* hooks.h (hook_tree_void_null): Declare.
	* hooks.c (hook_tree_void_null): New function.
	* langhooks.c (lhd_return_null_tree_v): Remove.
	* langhooks-def.h (lhd_return_null_tree_v): Remove.
	* cfgexpand.c (stack_protect_prologue): If guard_decl is NULL,
	set y to const0_rtx.
	* function.c (stack_protect_epilogue): Likewise.
	* config/tilepro/tilepro.c (TARGET_STACK_PROTECT_GUARD): Redefine
	if TARGET_THREAD_SSP_OFFSET is defined.
	* config/s390/s390.c (TARGET_STACK_PROTECT_GUARD): Likewise.
	* config/sparc/sparc.c (TARGET_STACK_PROTECT_GUARD): Likewise.
	* config/tilegx/tilegx.c (TARGET_STACK_PROTECT_GUARD): Likewise.
	* config/rs6000/rs6000.c (TARGET_STACK_PROTECT_GUARD): Likewise.
	* config/i386/i386.c (TARGET_STACK_PROTECT_GUARD): Likewise.
	(ix86_stack_protect_guard): New function.
c/
	* c-objc-common.h (LANG_HOOKS_GETDECLS): Use hook_tree_void_null
	instead of lhd_return_null_tree_v.
ada/
	* gcc-interface/misc.c (LANG_HOOKS_GETDECLS): Use hook_tree_void_null
	instead of lhd_return_null_tree_v.

From-SVN: r241087

6 files changed, 42 insertions, 0 deletions

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index f694611..eef6d7b 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -44023,6 +44023,18 @@ ix86_mangle_type (const_tree type)
     }
 }
 
+#ifdef TARGET_THREAD_SSP_OFFSET
+/* If using TLS guards, don't waste time creating and expanding
+   __stack_chk_guard decl and MEM as we are going to ignore it.  */
+static tree
+ix86_stack_protect_guard (void)
+{
+  if (TARGET_SSP_TLS_GUARD)
+    return NULL_TREE;
+  return default_stack_protect_guard ();
+}
+#endif
+
 /* For 32-bit code we can save PIC register setup by using
    __stack_chk_fail_local hidden function instead of calling
    __stack_chk_fail directly.  64-bit code doesn't need to setup any PIC
@@ -50614,6 +50626,11 @@ ix86_addr_space_zero_address_valid (addr_space_t as)
 #undef TARGET_MANGLE_TYPE
 #define TARGET_MANGLE_TYPE ix86_mangle_type
 
+#ifdef TARGET_THREAD_SSP_OFFSET
+#undef TARGET_STACK_PROTECT_GUARD
+#define TARGET_STACK_PROTECT_GUARD ix86_stack_protect_guard
+#endif
+
 #if !TARGET_MACHO
 #undef TARGET_STACK_PROTECT_FAIL
 #define TARGET_STACK_PROTECT_FAIL ix86_stack_protect_fail
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 1110ee2..c688e87 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -1752,6 +1752,11 @@ static const struct attribute_spec rs6000_attribute_table[] =
 #define TARGET_VECTORIZE_BUILTIN_MD_VECTORIZED_FUNCTION \
   rs6000_builtin_md_vectorized_function
 
+#ifdef TARGET_THREAD_SSP_OFFSET
+#undef TARGET_STACK_PROTECT_GUARD
+#define TARGET_STACK_PROTECT_GUARD hook_tree_void_null
+#endif
+
 #if !TARGET_MACHO
 #undef TARGET_STACK_PROTECT_FAIL
 #define TARGET_STACK_PROTECT_FAIL rs6000_stack_protect_fail
diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index 3bdb648..04d6d44 100644
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -15124,6 +15124,11 @@ s390_invalid_binary_op (int op ATTRIBUTE_UNUSED, const_tree type1, const_tree ty
 #undef TARGET_OPTION_OVERRIDE
 #define TARGET_OPTION_OVERRIDE s390_option_override
 
+#ifdef TARGET_THREAD_SSP_OFFSET
+#undef TARGET_STACK_PROTECT_GUARD
+#define TARGET_STACK_PROTECT_GUARD hook_tree_void_null
+#endif
+
 #undef	TARGET_ENCODE_SECTION_INFO
 #define TARGET_ENCODE_SECTION_INFO s390_encode_section_info
 
diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c
index f721ec2..ac05d96 100644
--- a/gcc/config/sparc/sparc.c
+++ b/gcc/config/sparc/sparc.c
@@ -798,6 +798,11 @@ char sparc_hard_reg_printed[8];
 #undef TARGET_OPTION_OVERRIDE
 #define TARGET_OPTION_OVERRIDE sparc_option_override
 
+#ifdef TARGET_THREAD_SSP_OFFSET
+#undef TARGET_STACK_PROTECT_GUARD
+#define TARGET_STACK_PROTECT_GUARD hook_tree_void_null
+#endif
+
 #if TARGET_GNU_TLS && defined(HAVE_AS_SPARC_UA_PCREL)
 #undef TARGET_ASM_OUTPUT_DWARF_DTPREL
 #define TARGET_ASM_OUTPUT_DWARF_DTPREL sparc_output_dwarf_dtprel
diff --git a/gcc/config/tilegx/tilegx.c b/gcc/config/tilegx/tilegx.c
index d743c63..0ef7559 100644
--- a/gcc/config/tilegx/tilegx.c
+++ b/gcc/config/tilegx/tilegx.c
@@ -5544,6 +5544,11 @@ tilegx_file_end (void)
 #undef  TARGET_OPTION_OVERRIDE
 #define TARGET_OPTION_OVERRIDE tilegx_option_override
 
+#ifdef TARGET_THREAD_SSP_OFFSET
+#undef TARGET_STACK_PROTECT_GUARD
+#define TARGET_STACK_PROTECT_GUARD hook_tree_void_null
+#endif
+
 #undef  TARGET_SCALAR_MODE_SUPPORTED_P
 #define TARGET_SCALAR_MODE_SUPPORTED_P tilegx_scalar_mode_supported_p
 
diff --git a/gcc/config/tilepro/tilepro.c b/gcc/config/tilepro/tilepro.c
index b39eff4..505c7a4 100644
--- a/gcc/config/tilepro/tilepro.c
+++ b/gcc/config/tilepro/tilepro.c
@@ -4948,6 +4948,11 @@ tilepro_file_end (void)
 #undef  TARGET_OPTION_OVERRIDE
 #define TARGET_OPTION_OVERRIDE tilepro_option_override
 
+#ifdef TARGET_THREAD_SSP_OFFSET
+#undef TARGET_STACK_PROTECT_GUARD
+#define TARGET_STACK_PROTECT_GUARD hook_tree_void_null
+#endif
+
 #undef  TARGET_SCALAR_MODE_SUPPORTED_P
 #define TARGET_SCALAR_MODE_SUPPORTED_P tilepro_scalar_mode_supported_p