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| author | Kai Tietz <ktietz@redhat.com> | 2014-06-23 23:52:31 +0200 |
|---|---|---|
| committer | Kai Tietz <ktietz@gcc.gnu.org> | 2014-06-23 23:52:31 +0200 |
| commit | 47c80ef5ab8fe002c4166b9e77ab945dd35be841 (patch) | |
| tree | 27a570c7008aafb5336eab029fece919f57bb6eb | |
| parent | 9b7a5864abed3d317b8e4b0a37b3998848e7c81b (diff) | |
| download | gcc-47c80ef5ab8fe002c4166b9e77ab945dd35be841.zip gcc-47c80ef5ab8fe002c4166b9e77ab945dd35be841.tar.gz gcc-47c80ef5ab8fe002c4166b9e77ab945dd35be841.tar.bz2 | |
re PR middle-end/39284 (Computed gotos combined too aggressively)
PR target/39284
* passes.def (peephole2): Move peephole2 pass before
before sched2 pass.
* config/i386/i386.md (peehole2): Combine memories
and indirect jumps.
From-SVN: r211919
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/config/i386/i386.md | 9 | ||||
| -rw-r--r-- | gcc/passes.def | 9 |
3 files changed, 25 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index df29feb..7d7bd25 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2014-06-23 Kai Tietz <ktietz@redhat.com> + + PR target/39284 + * passes.def (peephole2): Move peephole2 pass before + before sched2 pass. + * config/i386/i386.md (peehole2): Combine memories + and indirect jumps. + 2014-06-23 Richard Biener <rguenther@suse.de> * tree-ssa-loop.c (gate_loop): New function. diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index 44c7a0a..695b981 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -11466,6 +11466,15 @@ (match_dup 4))) (unspec [(const_int 0)] UNSPEC_PEEPSIB)])]) +;; Combining simple memory jump instruction + +(define_peephole2 + [(set (match_operand:W 0 "register_operand") + (match_operand:W 1 "memory_operand")) + (set (pc) (match_dup 0))] + "!TARGET_X32 && peep2_reg_dead_p (2, operands[0])" + [(set (pc) (match_dup 1))]) + ;; Call subroutine, returning value in operand 0 (define_expand "call_value" diff --git a/gcc/passes.def b/gcc/passes.def index c574b4e..729be9c 100644 --- a/gcc/passes.def +++ b/gcc/passes.def @@ -394,13 +394,20 @@ along with GCC; see the file COPYING3. If not see NEXT_PASS (pass_rtl_dse2); NEXT_PASS (pass_stack_adjustments); NEXT_PASS (pass_jump2); - NEXT_PASS (pass_peephole2); NEXT_PASS (pass_if_after_reload); NEXT_PASS (pass_regrename); NEXT_PASS (pass_cprop_hardreg); NEXT_PASS (pass_fast_rtl_dce); NEXT_PASS (pass_duplicate_computed_gotos); NEXT_PASS (pass_reorder_blocks); + /* We need to run peephole2 pass after the duplicate- + compute-gotos and the reorder-blocks pass (PR/39284). + We have a single indirect branch in the entire function + before duplicate-compute-gotos pass. This vastly reduces + the size of the CFG. + For preventing to run peephole2 pass twice, its run after + the jump2 got removed. */ + NEXT_PASS (pass_peephole2); NEXT_PASS (pass_branch_target_load_optimize2); NEXT_PASS (pass_leaf_regs); NEXT_PASS (pass_split_before_sched2); |