Improve AGU stalls avoidance optimization.

[pf3gnuchains/gcc-fork.git] / gcc / ChangeLog

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+2011-09-08  Enkovich Ilya  <ilya.enkovich@intel.com>
+
+       * config/i386/i386-protos.h (ix86_lea_outperforms): New.
+       (ix86_avoid_lea_for_add): Likewise.
+       (ix86_avoid_lea_for_addr): Likewise.
+       (ix86_split_lea_for_addr): Likewise.
+
+       * config/i386/i386.c (LEA_MAX_STALL): New.
+       (increase_distance): Likewise.
+       (insn_defines_reg): Likewise.
+       (insn_uses_reg_mem): Likewise.
+       (distance_non_agu_define_in_bb): Likewise.
+       (distance_agu_use_in_bb): Likewise.
+       (ix86_lea_outperforms): Likewise.
+       (ix86_ok_to_clobber_flags): Likewise.
+       (ix86_avoid_lea_for_add): Likewise.
+       (ix86_avoid_lea_for_addr): Likewise.
+       (ix86_split_lea_for_addr): Likewise.
+       (distance_non_agu_define): Search in pred BBs added.
+       (distance_agu_use): Search in succ BBs added.
+       (IX86_LEA_PRIORITY): Value changed from 2 to 0.
+       (LEA_SEARCH_THRESHOLD): Now depends on LEA_MAX_STALL.
+       (ix86_lea_for_add_ok): Use ix86_lea_outperforms to make decision.
+
+       * config/i386/i386.md: Split added to transform non destructive
+       add into move and add.
+       (lea_1): transformed into insn_and_split to avoid AGU stalls.
+       (lea<mode>_2): Likewise.
+
+2011-09-08  Martin Jambor  <mjambor@suse.cz>
+
+       PR tree-optimization/50287
+       * ipa-split.c (split_function): Do not create SSA names for
+       non-gimple-registers.
+
 2011-09-08  Richard Guenther  <rguenther@suse.de>
 
        PR tree-optimization/19831