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| author | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-06-22 18:45:58 +0000 |
|---|---|---|
| committer | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-06-22 18:45:58 +0000 |
| commit | 41e117358ed4bb389ce63c2fa769b77c67513944 (patch) | |
| tree | fec79d33e20d038b1ffb9d9aa5399045dabe8f12 | |
| parent | 0f93641f41997fd9440eb22c3392a10ded9db6c7 (diff) | |
| download | gcc-41e117358ed4bb389ce63c2fa769b77c67513944.tar.gz | |
2015-06-22 Vladimir Makarov <vmakarov@redhat.com>
PR bootstrap/63740
* lra-lives.c (process_bb_lives): Check insn copying the same
reload pseudo and don't create a copy for it.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@224753 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/lra-lives.c | 10 |
2 files changed, 15 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 8f20c77dd4a..05ed274a9f7 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2015-06-22 Vladimir Makarov <vmakarov@redhat.com> + + PR bootstrap/63740 + * lra-lives.c (process_bb_lives): Check insn copying the same + reload pseudo and don't create a copy for it. + 2015-06-22 Tom de Vries <tom@codesourcery.com> * tree-parloops.c (transform_to_exit_first_loop_alt): Add update_stmt diff --git a/gcc/lra-lives.c b/gcc/lra-lives.c index 16e1f386b3e..5157c85895e 100644 --- a/gcc/lra-lives.c +++ b/gcc/lra-lives.c @@ -768,7 +768,15 @@ process_bb_lives (basic_block bb, int &curr_point, bool dead_insn_p) dst_regno = REGNO (SET_DEST (set)); if (dst_regno >= lra_constraint_new_regno_start && src_regno >= lra_constraint_new_regno_start) - lra_create_copy (dst_regno, src_regno, freq); + { + /* It might be still an original (non-reload) insn with + one unused output and a constraint requiring to use + the same reg for input/output operands. In this case + dst_regno and src_regno have the same value, we don't + need a misleading copy for this case. */ + if (dst_regno != src_regno) + lra_create_copy (dst_regno, src_regno, freq); + } else if (dst_regno >= lra_constraint_new_regno_start) { if ((hard_regno = src_regno) >= FIRST_PSEUDO_REGISTER) |