* doc/invoke.texi: Add mcmodel to powerpc options.

	* configure.ac: Add HAVE_LD_LARGE_TOC test.
	* configure: Regenerate.
	* config.in: Regenerate.
	* config/rs6000/linux64.opt (mcmodel): New.
	* config/rs6000/linux64.h (TARGET_USES_LINUX64_OPT): Define.
	(TARGET_CMODEL): Define.
	(SUBSUBTARGET_OVERRIDE_OPTIONS): Check user -mcmodel choice,
	select CMODEL_MEDIUM default.
	* config/rs6000/rs6000.h (enum rs6000_cmodel): New.
	(TARGET_CMODEL): Define default.
	* config/rs6000/rs6000.c (cmodel): New variable.
	(rs6000_explicit_options): Add cmodel field.
	(rs6000_handle_option): Handle -mcmodel.
	(create_TOC_reference): Add largetoc_reg param.  Generate high,
	lo_sum rtl for CMODEL_MEDIUM and CMODEL_LARGE.  Update all callers.
	(rs6000_delegitimize_address): Recognise new toc reference rtl
	and minimal-toc rtl.
	(rs6000_legitimize_reload_address): Handle new toc references.
	(print_operand_address): Handle legitimate_constant_pool_address_p
	match before lo_sum.
	(rs6000_eliminate_indexed_memrefs): Tidy.
	(rs6000_emit_move): Tweak threshold for inlining constants.
	Keep rs6000_emit_allocate_stack large stack frame offsets
	loaded into r0 inline.
	(rs6000_generate_compare <cmptf_internal2>): One more clobber.
	(tocrel_base, tocrel_offset): New variables.
	(toc_relative_expr_p): Set them here.
	(print_operand_address): Skip over any offset on constant pool
	address.
	(rs6000_output_addr_const_extra): Print tocrel_offset before @toc.
	(rs6000_mode_dependent_address <LO_SUM>): False for new toc refs.
	(offsettable_ok_by_alignment): New function.
	(rs6000_emit_move): Address suitably aligned local symbol_refs
	relative to the toc pointer for -mcmodel=medium.
	(legitimate_constant_pool_address_p): Make param const_rtx.  Add
	strict param.  Allow lo_sum version of addressing.  Verify reg
	used for -mminimal-toc and -mcmodel != small.  Update all callers.
	* config/rs6000/constraints.md: Update for above change.
	* config/rs6000/predicates.md: Likewise.
	* config/rs6000/rs6000.md (tls_gd_aix): Generate -mcmodel=medium/large
	code.
	(tls_gd): Split for -mcmodel=medium/large.
	(tls_gd_high, tls_gd_low): New.
	(tls_ld_aix, tls_ld, tls_ld_high, tls_ld_low): Similarly.
	(tls_got_dtprel, tls_got_dtprel_high, tls_got_dtprel_low): Similarly.
	(tls_got_tprel, tls_got_tprel_high, tls_got_tprel_low): Similarly.
	(largetoc_high, largetoc_low): New.
	(cmptf_internal2): Add clobber.
	* config/rs6000/rs6000-protos.h: Update.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@160773 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 37 insertions, 0 deletions

diff --git a/gcc/configure b/gcc/configure
index 50baf170e19..d1dcf891b8d 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -24844,6 +24844,43 @@ $as_echo "$gcc_cv_ld_no_dot_syms" >&6; }
 $as_echo "#define HAVE_LD_NO_DOT_SYMS 1" >>confdefs.h
 
     fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking linker large toc support" >&5
+$as_echo_n "checking linker large toc support... " >&6; }
+if test "${gcc_cv_ld_large_toc+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_ld_large_toc=no
+    if test $in_tree_ld = yes ; then
+      if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
+        gcc_cv_ld_large_toc=yes
+      fi
+    elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
+      cat > conftest.s <<EOF
+	.section ".tbss","awT",@nobits
+	.align 3
+ie0:	.space 8
+	.global _start
+	.text
+_start:
+	addis 9,13,ie0@got@tprel@ha
+	ld 9,ie0@got@tprel@l(9)
+EOF
+      if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
+         && $gcc_cv_ld -melf64ppc --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
+        gcc_cv_ld_large_toc=yes
+      fi
+      rm -f conftest conftest.o conftest.s
+    fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_ld_large_toc" >&5
+$as_echo "$gcc_cv_ld_large_toc" >&6; }
+    if test x"$gcc_cv_ld_large_toc" = xyes; then
+
+$as_echo "#define HAVE_LD_LARGE_TOC 1" >>confdefs.h
+
+    fi
     ;;
 esac