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| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2018-12-03 09:49:02 +0000 |
|---|---|---|
| committer | Ilya Leoshkevich <iii@gcc.gnu.org> | 2018-12-03 09:49:02 +0000 |
| commit | 98fe146e5be55232c20ef242ee7c7e2123373df4 (patch) | |
| tree | 2a93928458a1a7d8f995e86940931e86e729de63 /gcc/tree-pass.h | |
| parent | e45130c59e988c6825b14b9f10f41fb2e256c2e5 (diff) | |
| download | gcc-98fe146e5be55232c20ef242ee7c7e2123373df4.zip gcc-98fe146e5be55232c20ef242ee7c7e2123373df4.tar.gz gcc-98fe146e5be55232c20ef242ee7c7e2123373df4.tar.bz2 | |
Repeat jump threading after combine
Consider the following RTL:
(insn (set (reg 65) (if_then_else (eq %cc 0) 1 0)))
(insn (parallel [(set %cc (compare (reg 65) 0)) (clobber %scratch)]))
(jump_insn (set %pc (if_then_else (ne %cc 0) (label_ref 23) %pc)))
Combine simplifies this into:
(note NOTE_INSN_DELETED)
(note NOTE_INSN_DELETED)
(jump_insn (set %pc (if_then_else (eq %cc 0) (label_ref 23) %pc)))
opening up the possibility to perform jump threading.
gcc/ChangeLog:
2018-12-03 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/80080
* cfgcleanup.c (class pass_postreload_jump): New pass.
(pass_postreload_jump::execute): Likewise.
(make_pass_postreload_jump): Likewise.
* passes.def: Add pass_postreload_jump before
pass_postreload_cse.
* tree-pass.h (make_pass_postreload_jump): New pass.
gcc/testsuite/ChangeLog:
2018-12-03 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/80080
* gcc.target/s390/pr80080-4.c: New test.
From-SVN: r266734
Diffstat (limited to 'gcc/tree-pass.h')
| -rw-r--r-- | gcc/tree-pass.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/tree-pass.h b/gcc/tree-pass.h index 2f8779e..b20d34c 100644 --- a/gcc/tree-pass.h +++ b/gcc/tree-pass.h @@ -579,6 +579,7 @@ extern rtl_opt_pass *make_pass_clean_state (gcc::context *ctxt); extern rtl_opt_pass *make_pass_branch_prob (gcc::context *ctxt); extern rtl_opt_pass *make_pass_value_profile_transformations (gcc::context *ctxt); +extern rtl_opt_pass *make_pass_postreload_jump (gcc::context *ctxt); extern rtl_opt_pass *make_pass_postreload_cse (gcc::context *ctxt); extern rtl_opt_pass *make_pass_gcse2 (gcc::context *ctxt); extern rtl_opt_pass *make_pass_split_after_reload (gcc::context *ctxt); |