ChangeLog:

	* configure.ac (--enable-lto): Add x86_64-apple-darwin* as
	a platform that supports LTO.
	* configure: Regenerate.

gcc/ChangeLog:
	* config.gcc (i[34567]86-*-darwin*, x86_64-*-darwin*): Add
	lto-macho as lto_binary_reader.
	* target.h (struct gcc_target): New hooks lto_start and	lto_end.
	* target-def.h (TARGET_ASM_LTO_START, TARGET_ASM_LTO_END): Define.
	* cgraphunit.c (ipa_passes): Wrap LTO assembler output generation
	in lto_start and lto_end calls.
	(is_elf_or_coff): Rename to maybe_lto_object_file.  Add Mach-O
	magic numbers.
	(scan_prog_file): Update is_elf_or_coff call.
	* doc/tm.text (TARGET_ASM_LTO_START, TARGET_ASM_LTO_END): Document.

	* collect2.c (main): Fix enum comparison.

	* config/darwin-protos.h (darwin_asm_lto_start, darwin_asm_lto_end):
	Add prototypes.
	* darwin9.h (LINK_COMMAND_SPEC): Pass -flto and -fwhopr to the linker.
	* darwin.h (LINK_COMMAND_SPEC): Likewise.  Define TARGET_ASM_LTO_START
	and TARGET_ASM_LTO_END.
	* darwin.c: Include obstack.h and lto-streamer.h.
	(lto_section_names_offset, lto_section_names_obstack,
	lto_asm_out_file, lto_asm_out_name, saved_asm_out_file): New static
	global variables.
	(LTO_SEGMENT_NAME, LTO_NAMES_SECTION): New defines.
	(darwin_asm_lto_start): New function.  Redirect output to asm_out_file
	to a temporary file.
	(darwin_asm_lto_end): New function.  Restore asm_out_file.
	(darwin_asm_named_section): For LTO sections, replace the name with
	the offset of the section name in a string table, and build this
	table.
	(darwin_file_start): Initialize global vars for LTO support.
	(darwin_file_end): If output to asm_out_file was redirected, append it
	to the proper asm_out_file here.  Add the section names section.

lto/ChangeLog:
	* lto.h (struct lto_file_struct): Document offset member.
	* lto-endian.h: New file.
	* lto-macho.h: New file.
	* lto-macho.c: New file.
	* Make-lang.in: Add rule for lto-macho.o.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@159173 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 11 insertions, 0 deletions

diff --git a/gcc/config/darwin.h b/gcc/config/darwin.h
index 9e60b1112e2..a0a4974c38a 100644
--- a/gcc/config/darwin.h
+++ b/gcc/config/darwin.h
@@ -273,6 +273,7 @@ extern GTY(()) int darwin_ms_struct;
     %{o*}%{!o:-o a.out} \
     %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
+    %{flto} %{fwhopr} \
     %{fopenmp|ftree-parallelize-loops=*: \
       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
     %{!nostdlib:%{!nodefaultlibs: %(link_ssp) %G %L }} \
@@ -581,6 +582,16 @@ extern GTY(()) int darwin_ms_struct;
 #undef  TARGET_ASM_FILE_END
 #define TARGET_ASM_FILE_END darwin_file_end
 
+/* Because Mach-O relocations have a counter from 1 to 255 for the
+   section number they apply to, it is necessary to output all
+   normal sections before the LTO sections, to make sure that the
+   sections that may have relocations always have a section number
+   smaller than 255.  */
+#undef  TARGET_ASM_LTO_START
+#define TARGET_ASM_LTO_START darwin_asm_lto_start
+#undef  TARGET_ASM_LTO_END
+#define TARGET_ASM_LTO_END darwin_asm_lto_end
+
 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)