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| author | Jakub Jelinek <jakub@redhat.com> | 2016-10-28 09:12:52 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2016-10-28 09:12:52 +0200 |
| commit | 0d9e143c62c7a68474a39de40e5d6104074eee96 (patch) | |
| tree | 6863d090de2407d3069a9ae76f697e28c272cfda /gcc/ree.c | |
| parent | 4d925a90692f9191679ce0517c50ed197038c44d (diff) | |
| download | gcc-0d9e143c62c7a68474a39de40e5d6104074eee96.zip gcc-0d9e143c62c7a68474a39de40e5d6104074eee96.tar.gz gcc-0d9e143c62c7a68474a39de40e5d6104074eee96.tar.bz2 | |
re PR rtl-optimization/78132 (GCC produces invalid instruction (kmovd and kmovq) for KNL.)
PR rtl-optimization/78132
* ree.c (combine_reaching_defs): Give up if copy_needed and
!HARD_REGNO_MODE_OK (REGNO (src_reg), dst_mode).
* gcc.target/i386/pr78132.c: New test.
From-SVN: r241641
Diffstat (limited to 'gcc/ree.c')
| -rw-r--r-- | gcc/ree.c | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -788,6 +788,11 @@ combine_reaching_defs (ext_cand *cand, const_rtx set_pat, ext_state *state) machine_mode dst_mode = GET_MODE (SET_DEST (PATTERN (cand->insn))); rtx src_reg = get_extended_src_reg (SET_SRC (PATTERN (cand->insn))); + /* Ensure we can use the src_reg in dst_mode (needed for + the (set (reg1) (reg2)) insn mentioned above). */ + if (!HARD_REGNO_MODE_OK (REGNO (src_reg), dst_mode)) + return false; + /* Ensure the number of hard registers of the copy match. */ if (HARD_REGNO_NREGS (REGNO (src_reg), dst_mode) != HARD_REGNO_NREGS (REGNO (src_reg), GET_MODE (src_reg))) |