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72 Commits

Author SHA1 Message Date
Vladimir Ivanov
7e2640432b 8255000: C2: Unify IGVN processing when loop opts are over 
Reviewed-by: neliasso, iveresov, kvn
 2020-10-21 08:09:00 +00:00
Vladimir Ivanov
27230fae24 8255026: C2: Miscellaneous cleanups in Compile and PhaseIdealLoop code 
Reviewed-by: thartmann, neliasso, redestad
 2020-10-21 07:34:54 +00:00
Roland Westrelin
e76de18956 8223051: support loops with long (64b) trip counts 
Reviewed-by: vlivanov, thartmann, jrose
 2020-10-19 11:30:13 +00:00
Roland Westrelin
a6c23b7753 8253923: C2 doesn't always run loop opts for compilations that include loops 
Reviewed-by: neliasso, thartmann
 2020-10-12 10:55:22 +00:00
Roland Westrelin
76a5852776 8253756: C2 CompilerThread0 crash in Node::add_req(Node*) 
Reviewed-by: vlivanov, thartmann
 2020-10-08 08:39:40 +00:00
Roberto Castaneda Lozano
f3ea0d362f 8252583: Clean up unused phi-to-copy degradation mechanism 
Remove unused notion of 'PhiNode-to-copy degradation', where PhiNodes can be
degraded to copies by setting their RegionNode to NULL. Remove corresponding
PhiNode::is_copy() test, which always returned NULL (false). Assert that
PhiNodes have an associated RegionNode in PhiNode::Ideal().

Reviewed-by: thartmann, kvn
 2020-09-24 08:10:56 +00:00
Christian Hagedorn
8d30bb03ee 8249607: C2: assert(!had_error) failed: bad dominance 
Fix prevented igvn optimization in SplitIf for LoadNodes which resulted in dominanance errors with loop strip mining.

Reviewed-by: roland, kvn
 2020-08-31 12:10:25 +02:00
Roland Westrelin
c663323043 8252292: 8240795 may cause anti-dependence to be missed 
Reviewed-by: thartmann, kvn
 2020-08-24 11:29:40 +02:00
Mikael Vidstedt
1f5e21a16e Merge 2020-07-15 21:24:39 -07:00
Roland Westrelin
b67814941f 8229495: SIGILL in C2 generated OSR compilation 
Reviewed-by: kvn, chagedorn
 2020-07-01 17:28:49 +02:00
Christian Hagedorn
840867efa6 8247218: Add default constructor to VectorSet to use Thread::current()->resource_area() as arena by default 
Add a default construction to VectorSet and clean up uses of the old constructor.

Reviewed-by: kvn, thartmann
 2020-06-29 17:14:19 +02:00
Roland Westrelin
01cfedf2c9 8244086: Following 8241492, strip mined loop may run extra iterations 
Reviewed-by: mdoerr, thartmann
 2020-04-29 10:06:38 +02:00
Roland Westrelin
57388f807f 8244504: C2: refactor counted loop code in preparation for long counted loop 
Reviewed-by: jrose, thartmann
 2020-05-28 14:34:01 +02:00
Yong Zhou
dc54da232d 8244407: JVM crashes after transformation in C2 IdealLoopTree::split_fall_in 
Reviewed-by: thartmann, kvn
 2020-05-13 07:25:47 +08:00
Roland Westrelin
73ddea766a 8241492: Strip mining not working for test/hotspot/jtreg/compiler/c2/Test6850611.java 
Reviewed-by: mdoerr, thartmann, neliasso
 2020-03-24 17:56:15 +01:00
Roland Westrelin
c9faf88cb7 8240795: [REDO] 8238384 CTW: C2 compilation fails with "assert(store != load->find_exact_control(load->in(0))) failed: dependence cycle found" 
Reviewed-by: kvn, thartmann
 2020-03-13 16:32:51 +01:00
Roland Westrelin
43e0165eea 8240794: [BACKOUT] 8238384 CTW: C2 compilation fails with "assert(store != load->find_exact_control(load->in(0))) failed: dependence cycle found" 
Reviewed-by: thartmann
 2020-03-10 10:45:01 +01:00
Dongbo He
aa2be1141d 8240576: JVM crashes after transformation in C2 IdealLoopTree::merge_many_backedges 
Reviewed-by: kvn
 2020-03-09 22:31:12 +08:00
Roland Westrelin
86ad195099 8238384: CTW: C2 compilation fails with "assert(store != load->find_exact_control(load->in(0))) failed: dependence cycle found" 
Reviewed-by: vlivanov, thartmann
 2020-02-20 16:41:05 +01:00
Stefan Karlsson
1491340708 8240223: Use consistent predicate order in and with PhaseIdealLoop::find_predicate 
Reviewed-by: thartmann, neliasso, chagedorn
 2020-03-02 12:30:59 +01:00
Stefan Karlsson
ac60e4b98e 8240220: IdealLoopTree::dump_head predicate printing is broken 
Reviewed-by: thartmann, neliasso, chagedorn
 2020-03-02 12:30:57 +01:00
Roland Westrelin
52d46c314b 8238691: C2: turn subtype check into macro node 
Reviewed-by: vlivanov, thartmann
 2020-02-14 10:31:34 +01:00
Stefan Karlsson
e4b27a48a0 8183574: Unify the is_power_of_2 functions 
Reviewed-by: kbarrett, redestad
 2020-02-17 10:03:17 +01:00
Roland Westrelin
1af059d4cb 8231291: C2: loop opts before EA should maximally unroll loops 
Reviewed-by: kvn, vlivanov
 2019-12-20 17:17:37 +01:00
Jesper Wilhelmsson
b936939454 Merge 2020-01-20 18:05:07 +01:00
Roland Westrelin
995fae6d4b 8235584: UseProfiledLoopPredicate fails with assert(_phase->get_loop(c) == loop) failed: have to be in the same loop 
Reviewed-by: thartmann, neliasso
 2020-01-10 17:50:51 +01:00
Patric Hedlin
9549cd2877 8235870: C2 crashes in IdealLoopTree::est_loop_flow_merge_sz() 
Reviewed-by: thartmann
 2020-01-13 11:26:44 +01:00
Nils Eliasson
e1b94b1635 8235653: Clean-up BarrierSetC2 
Reviewed-by: redestad, rkennke, thartmann
 2019-12-11 14:08:20 +01:00
Tobias Hartmann
642d2ddcbc 8235452: Strip mined loop verification fails with assert(is_OuterStripMinedLoop()) failed: invalid node class 
Do not try to verify strip mining if the strip mined loop is malformed.

Reviewed-by: roland, vlivanov
 2019-12-11 10:42:44 +01:00
Claes Redestad
06cb195865 8234331: Add robust and optimized utility for rounding up to next power of two 
Reviewed-by: eosterlund, stuefe, jrose
 2019-12-06 18:05:36 +01:00
Jesper Wilhelmsson
d34f561de0 Merge 2020-01-15 20:41:46 +01:00
Roland Westrelin
8d2e11397a 8237007: Shenandoah: assert(_base == Tuple) failure during C2 compilation 
Reviewed-by: thartmann, rkennke
 2020-01-09 17:26:26 +01:00
Claes Redestad
12adeca887 8233708: VectorSet cleanup 
Reviewed-by: neliasso, shade, thartmann
 2019-11-07 12:12:39 +01:00
Erik Österlund
42885307f6 8230565: ZGC: Redesign C2 load barrier to expand on the MachNode level 
Co-authored-by: Per Liden <per.liden@oracle.com>
Co-authored-by: Stefan Karlsson <stefan.karlsson@oracle.com>
Co-authored-by: Nils Eliasson <nils.eliasson@oracle.com>
Reviewed-by: pliden, stefank, neliasso
 2019-10-09 12:30:06 +00:00
Roland Westrelin
703760bbec 8231550: C2: ShouldNotReachHere() in verify_strip_mined_scheduling 
Reviewed-by: vlivanov, thartmann
 2019-10-02 17:32:08 +02:00
Patric Hedlin
8275b17b07 8229499: Node budget assert in fuzzed test 
Reviewed-by: thartmann, neliasso
 2019-09-12 11:44:51 +02:00
Christian Hagedorn
2c3973af9b 8225653: Provide more information when hitting SIGILL from HaltNode 
Add information string for each HaltNode which is printed if hit at runtime.

Reviewed-by: vlivanov, thartmann
 2019-09-10 08:43:33 +02:00
Erik Österlund
a8842c9f59 8225642: ZGC: Crash due to bad oops being spilled to stack in load barriers 
Co-authored-by: Stuart Monteith <stuart.monteith@linaro.org>
Reviewed-by: neliasso, pliden
 2019-07-02 11:33:05 +02:00
Patric Hedlin
ca29203cac 8225475: Node budget asserts on x86_32/64 
Make the (ad-hoc) loop cloning size estimate more pessimistic.

Reviewed-by: shade
 2019-06-25 11:43:36 +02:00
Nils Eliasson
75e9d0a290 8224675: Late GC barrier insertion for ZGC 
Reviewed-by: roland, eosterlund, pliden
 2019-02-14 14:54:05 +01:00
Patric Hedlin
d222b01dee 8223363: Bad node estimate assertion failure 
8223502: Node estimate for loop unswitching is not correct: assert(delta <= 2 * required) failed: Bad node estimate
8224648: assert(!exceeding_node_budget()) failed: Too many NODES required! failure with ctw

Tighten the node estimates. New est_loop_clone_sz() implementation that will compute a "fan-out" complexity estimate as part of the size estimate (to better estimate complex loop body size after cloning). New est_loop_unroll_sz() function, used to estimate the size of a loop body att full/maximal unrolling. Correction to node budget final tests and asserts.

Reviewed-by: neliasso, kvn
 2019-05-28 14:56:58 +02:00
Patric Hedlin
e08506e683 8216137: assert failed: Live node limit exceeded 
8219520: assert failed: Live node limit exceeded

Adding simplistic node budget support for loop-transformations. This /should/attempts to/ resolve most cases of: "assert(Compile::current()->live_nodes() < Compile::current()->max_node_limit()) failed: Live Node limit exceeded limit".

Reviewed-by: vlivanov, neliasso
 2019-04-17 14:57:53 +02:00
Patric Hedlin
f4faee7bae 8223140: Clean-up in 'ok_to_convert()' 
Simplify logic in function. Added precond/postcond macros.

Reviewed-by: vlivanov, neliasso
 2019-04-17 14:55:11 +02:00
Patric Hedlin
205085d8d5 8223138: Small clean-up in loop-tree support 
Rename predicate 'is_inner()' to 'is_innermost()' to be accurate. Added 'is_root()' predicate for root parent test in loop-tree. Changed definition of 'is_loop()' to always lazy-read the tail, since it should never be NULL. Cleanup of 'tail()' definition.

Reviewed-by: vlivanov, neliasso
 2019-05-02 11:05:47 +02:00
Patric Hedlin
fcbca82247 8223137: Rename predicate 'do_unroll_only()' to 'is_unroll_only()' 
Reviewed-by: vlivanov
 2019-04-17 14:52:25 +02:00
Roman Kennke
03ab1404f0 8221766: Load-reference barriers for Shenandoah 
Reviewed-by: kvn, erikj, aph, shade
 2019-04-02 23:00:22 +02:00
Roland Westrelin
3ec1137c1f 8220374: C2: LoopStripMining doesn't strip as expected 
Reviewed-by: rkennke, thartmann, mdoerr
 2019-03-12 15:42:32 +01:00
Vladimir Ivanov
40c61cce4b 8218874: C2: Unsafe to access PhaseIdealLoop outside of constructors 
Reviewed-by: thartmann, kvn
 2019-02-14 15:27:12 -08:00
Roman Kennke
8b62a2ee9d 8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) 
Co-authored-by: Christine Flood <chf@redhat.com>
Co-authored-by: Aleksey Shipilev <shade@redhat.com>
Co-authored-by: Roland Westrelin <rwestrel@redhat.com>
Co-authored-by: Zhenygu Gu <zgu@redhat.com>
Co-authored-by: Andrew Haley <aph@redhat.com>
Co-authored-by: Andrew Dinn <adinn@redhat.com>
Co-authored-by: Mario Torre <mtorre@redhat.com>
Reviewed-by: kvn, roland, shade, coleenp, lmesnik, pliden, jgeorge, ihse, erikj
 2018-12-10 15:47:44 +01:00
Roland Westrelin
8849b1c7b7 8214172: GC interface entry points for loop opts 
Reviewed-by: kvn, rkennke
 2018-11-27 09:35:02 +01:00