https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62011
--- Comment #12 from uros at gcc dot gnu.org --- Author: uros Date: Thu Aug 21 18:03:49 2014 New Revision: 214279 URL: https://gcc.gnu.org/viewcvs?rev=214279&root=gcc&view=rev Log: Backport from mainline 2014-08-19 H.J. Lu <hongjiu...@intel.com> * config/i386/i386.md (*ctz<mode>2_falsedep_1): Don't clear destination if it is used in source. (*clz<mode>2_lzcnt_falsedep_1): Likewise. (*popcount<mode>2_falsedep_1): Likewise. Backport from mainline 2014-08-18 Uros Bizjak <ubiz...@gmail.com> PR target/62011 * config/i386/x86-tune.def (X86_TUNE_AVOID_FALSE_DEP_FOR_BMI): New tune flag. * config/i386/i386.h (TARGET_AVOID_FALSE_DEP_FOR_BMI): New define. * config/i386/i386.md (unspec) <UNSPEC_INSN_FALSE_DEP>: New unspec. (ffs<mode>2): Do not expand with tzcnt for TARGET_AVOID_FALSE_DEP_FOR_BMI. (ffssi2_no_cmove): Ditto. (*tzcnt<mode>_1): Disable for TARGET_AVOID_FALSE_DEP_FOR_BMI. (ctz<mode>2): New expander. (*ctz<mode>2_falsedep_1): New insn_and_split pattern. (*ctz<mode>2_falsedep): New insn. (*ctz<mode>2): Rename from ctz<mode>2. (clz<mode>2_lzcnt): New expander. (*clz<mode>2_lzcnt_falsedep_1): New insn_and_split pattern. (*clz<mode>2_lzcnt_falsedep): New insn. (*clz<mode>2): Rename from ctz<mode>2. (popcount<mode>2): New expander. (*popcount<mode>2_falsedep_1): New insn_and_split pattern. (*popcount<mode>2_falsedep): New insn. (*popcount<mode>2): Rename from ctz<mode>2. (*popcount<mode>2_cmp): Remove. (*popcountsi2_cmp_zext): Ditto. Modified: branches/gcc-4_9-branch/gcc/ChangeLog branches/gcc-4_9-branch/gcc/config/i386/i386.h branches/gcc-4_9-branch/gcc/config/i386/i386.md branches/gcc-4_9-branch/gcc/config/i386/x86-tune.def
