+2011-12-19 Richard Sandiford <rdsandiford@googlemail.com>
+
+ PR rtl-optimization/42839
+ * fwprop.c (forward_propagate_subreg): Skip the SIGN/ZERO_EXTEND
+ optimization if the source register is already extended.
+
+2011-12-19 Richard Sandiford <rdsandiford@googlemail.com>
+
+ * lower-subreg.c (can_decompose_p): Check every word of a hard
+ register.
+
+2011-12-19 Sandra Loosemore <sandra@codesourcery.com>
+ Tom de Vries <tom@codesourcery.com>
+
+ PR rtl-opt/50380
+ * cse.c (find_comparison_args): Detect fixed point and
+ bail early.
+
+2011-12-19 Aldy Hernandez <aldyh@redhat.com>
+
+ PR middle-end/51411
+ * trans-mem.c (ipa_tm_create_version): Unset DECL_WEAK.
+
+2011-12-19 Quentin Neill <quentin.neill@amd.com>
+
+ PR target/48743
+ * config/i386/driver-i386.c (host_detect_local_cpu): Also check
+ family to distinguish PROCESSOR_ATHLON.
+
+2011-12-19 Richard Guenther <rguenther@suse.de>
+
+ PR lto/51573
+ * streamer-hooks.h (struct streamer_hooks): Add second
+ ref_p parameter to write_tree.
+ (stream_write_tree): Adjust.
+ (stream_write_tree_shallow_non_ref): New define.
+ * lto-streamer.h (lto_output_tree): Adjust.
+ * lto-streamer-out.c (lto_output_tree): Likewise.
+ * tree-streamer-out.c (streamer_write_chain): Only
+ force the immediate tree to be streamed as non-reference.
+
+2011-12-19 Martin Jambor <mjambor@suse.cz>
+
+ PR tree-optimization/51583
+ * tree-sra.c (load_assign_lhs_subreplacements): Call
+ force_gimple_operand_gsi when necessary also in case of no
+ corresponding replacement on the RHS.
+
+2011-12-19 Jakub Jelinek <jakub@redhat.com>
+
+ * gimple.h (gimplify_seq_add_stmt): Rename to...
+ (gimple_seq_add_stmt_without_update): ... this.
+ * gimplify.c (gimplify_seq_add_stmt): Rename to...
+ (gimple_seq_add_stmt_without_update): ... this.
+ (gimplify_seq_add_stmt): New inline wrapper for it.
+ * tree-vect-patterns.c (append_pattern_def_seq): Use
+ gimple_seq_add_stmt_without_update instead of gimplify_seq_add_stmt.
+
+ PR tree-optimization/51596
+ * tree-cfg.c (replace_uses_by): Call gimple_purge_dead_eh_edges
+ when needed.
+
+ PR middle-end/51590
+ PR tree-optimization/51606
+ * tree-vect-patterns.c (append_pattern_def_seq, new_pattern_def_seq):
+ New inline functions.
+ (vect_recog_over_widening_pattern,
+ vect_recog_vector_vector_shift_pattern,
+ vect_recog_sdivmod_pow2_pattern, vect_recog_mixed_size_cond_pattern,
+ adjust_bool_pattern_cast, vect_recog_bool_pattern): Use them.
+
+2011-12-19 Richard Guenther <rguenther@suse.de>
+
+ PR lto/51572
+ * tree.c (free_lang_data_in_type): Do not unlink TYPE_DECL
+ from TYPE_FIELDS.
+ (find_decls_types_r): Walk TYPE_DECLs in TYPE_FIELDS.
+ * tree-streamer-out.c (write_ts_field_decl_tree_pointers): Do
+ not stream TREE_CHAIN.
+ (write_ts_type_non_common_tree_pointers): Stream TYPE_FIELDS
+ using streamer_write_chain.
+ * tree-streamer-in.c (lto_input_ts_field_decl_tree_pointers):
+ Do not stream TREE_CHAIN.
+ (lto_input_ts_type_non_common_tree_pointers): Stream TYPE_FIELDS
+ using streamer_read_chain.
+ * gimple-streamer-in.c (input_gimple_stmt): Skip non-FIELD_DECLs.
+ * gimple.c (gimple_canonical_types_compatible_p): Properly
+ handle trailing non-FIELD_DECLs in TYPE_FIELDS.
+
+2011-12-19 Andreas Schwab <schwab@linux-m68k.org>
+
+ * configure: Regenerate.
+
+2011-12-19 Bernd Schmidt <bernds@codesourcery.com>
+
+ * emit-rtl.c (init_emit_once): Initialize const_tiny_rtx[3] for
+ partial integer modes.
+
+2011-12-19 Andreas Schwab <schwab@linux-m68k.org>
+
+ PR target/51532
+ * config/m68k/m68k.h (FL_CAS, TARGET_CAS): Define.
+ * config/m68k/m68k.c (FL_FOR_isa_20): Add FL_CAS.
+ * config/m68k/sync.md: Use TARGET_CAS instead of (TARGET_68020 ||
+ TARGET_68040).
+
+2011-12-18 Anatoly Sokolov <aesok@post.ru>
+
+ * config/ia64/ia64.h (REG_OK_FOR_BASE_P, REG_OK_FOR_INDEX_P,
+ LEGITIMATE_ADDRESS_REG, LEGITIMATE_ADDRESS_DISP,
+ GO_IF_LEGITIMATE_ADDRESS): Remove macros.
+ * config/ia64/ia64.c (TARGET_LEGITIMATE_ADDRESS_P): Define.
+ (ia64_reg_ok_for_base_p, ia64_legitimate_address_reg,
+ ia64_legitimate_address_disp, ia64_legitimate_address_p): New
+ functions.
+
+2011-12-17 Tom de Vries <tom@codesourcery.com>
+
+ PR tree-optimization/51491
+ * tree-ssa-ccp.c (insert_clobber_before_stack_restore)
+ (gsi_prev_dom_bb_nondebug, insert_clobbers_for_var): New function.
+ (ccp_fold_stmt): Use insert_clobbers_for_var after a successful
+ fold_builtin_alloca_with_align.
+ (ccp_visit_stmt): Calculate and free dominator info.
+
+2011-12-16 Eric Botcazou <ebotcazou@adacore.com>
+
+ * config/sparc/sparc.md (UNSPEC_FRAME_BLOCKAGE): New constant.
+ (frame_blockage): New expander.
+ (frame_blockage<P:mode>): New instruction.
+ * config/sparc/sparc.c (sparc_expand_prologue): When the sequence of
+ instructions establishing the frame isn't atomic, emit frame blockage.
+
+2011-12-16 Tristan Gingold <gingold@adacore.com>
+
+ * config/alpha/vms.h (USE_TM_CLONE_REGISTRY): Define.
+
+2011-12-16 Tristan Gingold <gingold@adacore.com>
+
+ * config/alpha/alpha.c (alpha_use_linkage): Follow transparent alias.
+ (alpha_write_one_linkage): Use assemble_name to emit linkage name.
+
+2011-12-16 Tristan Gingold <gingold@adacore.com>
+
+ * config/vms/t-vms (vms.o, vms-c.o): Force output filename.
+
+2011-12-16 Tristan Gingold <gingold@adacore.com>
+
+ * config/vms/vms.c (VMS_CRTL_GLOBAL): Define.
+ (vms_patch_builtins): Handle.
+ * config/vms/vms-crtlmap.map: Add an entry for environ.
+
2011-12-16 Jakub Jelinek <jakub@redhat.com>
PR debug/51557