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go/test/fixedbugs
Michael Munday ac743dea8e cmd/compile: always tighten and de-duplicate tuple selectors
The scheduler assumes two special invariants that apply to tuple
selectors (Select0 and Select1 ops):

  1. There is only one tuple selector of each type per generator.
  2. Tuple selectors and generators reside in the same block.

Prior to this CL the assumption was that these invariants would
only be broken by the CSE pass. The CSE pass therefore contained
code to move and de-duplicate selectors to fix these invariants.

However it is also possible to write relatively basic optimization
rules that cause these invariants to be broken. For example:

  (A (Select0 (B))) -> (Select1 (B))

This rule could result in the newly added selector (Select1) being
in a different block to the tuple generator (see issue #38356). It
could also result in duplicate selectors if this rule matches
multiple times for the same tuple generator (see issue #39472).

The CSE pass will 'fix' these invariants. However it will only do
so when optimizations are enabled (since disabling optimizations
disables the CSE pass).

This CL moves the CSE tuple selector fixup code into its own pass
and makes it mandatory even when optimizations are disabled. This
allows tuple selectors to be treated like normal ops for most of
the compilation pipeline until after the new pass has run, at which
point we need to be careful to maintain the invariant again.

Fixes #39472.

Change-Id: Ia3f79e09d9c65ac95f897ce37e967ee1258a080b
Reviewed-on: https://go-review.googlesource.com/c/go/+/237118
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2020-06-10 14:55:29 +00:00
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issue29919.dir cmd/compile: rename init function from init.ializers back to init 2019-03-18 20:41:12 +00:00
issue30659.dir test: add new test for gccgo compilation problem 2019-03-12 00:04:59 +00:00
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issue30907.dir cmd/compile: fix importing rewritten f(g()) calls 2019-03-18 19:43:38 +00:00
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issue31636.dir runtime: revert init order changes 2019-05-22 11:07:00 +00:00
issue31637.dir test: new test for issue 31637 2019-04-24 19:55:13 +00:00
issue31959.dir cmd/compile: fix typecheck type alias makes wrong export symbol metadata 2019-05-21 17:44:21 +00:00
issue32595.dir cmd/compile: don't mark argument array as noalg 2019-06-25 21:30:39 +00:00
issue32778.dir test: add testcase for gccgo compile failure 2019-07-02 16:34:55 +00:00
issue32901.dir test: add a test for gccgo bug #32901 2019-07-03 14:12:22 +00:00
issue32922.dir test: add new test case for gccgo compiler bug 2019-07-08 13:20:23 +00:00
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issue33739.dir test: add test that failed with gccgo 2019-08-28 18:35:32 +00:00
issue33866.dir test: add test that failed with gccgo 2019-09-06 12:11:17 +00:00
issue34503.dir test: add testcase for gccgo compiler buglet 2019-09-25 18:10:57 +00:00
issue34577.dir test: revise testcase for new gccgo compiler bug 2019-10-14 16:13:27 +00:00
issue35586.dir test: new test for gollvm compiler crash bug 2019-11-18 21:19:53 +00:00
issue36085.dir test: add a test for gccgo compiler bug of missing type descriptor 2019-12-11 19:48:39 +00:00
issue37513.dir runtime: print instruction bytes when reporting a SIGILL 2020-03-02 18:46:06 +00:00
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issue13365.go cmd/compile: make duplicate index error distinguish arrays and slices 2019-11-01 01:51:26 +00:00
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issue13799.go cmd/compile: trim function name prefix from escape diagnostics 2019-09-16 15:30:51 +00:00
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issue14636.go all: remove darwin/arm build-tags and files 2020-04-08 18:35:43 +00:00
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issue14999.go cmd/compile: remove period from "not allowed in runtime" errors 2019-10-14 19:32:08 +00:00
issue15002.go cmd/compile,runtime: provide index information on bounds check failure 2019-03-18 17:33:38 +00:00
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issue15071.go test/fixedbugs: fix some tests will not be run 2019-05-23 01:39:41 +00:00
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issue15609.go test: skip a test on failing test on nacl/386 2019-05-23 20:48:20 +00:00
issue15611.go cmd/compile/internal/syntax: better scanner error messages 2020-03-05 00:40:38 +00:00
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issue15992.go test: fix issue 15992 test wrong function call 2020-03-11 06:06:20 +00:00
issue15992.out cmd/compile: rewrite f(g()) for multi-value g() during typecheck 2019-03-14 21:00:20 +00:00
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issue17038.go cmd/compile: rewrite f(g()) for multi-value g() during typecheck 2019-03-14 21:00:20 +00:00
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issue17318.go cmd/compile: trim function name prefix from escape diagnostics 2019-09-16 15:30:51 +00:00
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issue17645.go cmd/compile: rewrite untyped constant conversion logic 2019-09-06 23:15:48 +00:00
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issue18915.go cmd/compile/internal/syntax: better error when an assignment is used in value context 2020-02-21 22:57:52 +00:00
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issue19743.go cmd/compile: skip escape analysis diagnostics for OADDR 2019-04-02 16:34:03 +00:00
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issue20185.go cmd/compile: report more precise errors about untyped constants 2019-09-09 22:12:15 +00:00
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issue21317.go cmd/compile/internal/gc: reword "declared and not used" error message 2019-10-28 23:34:13 +00:00
issue21576.go test/fixedbugs: bump issue21576.go's timeout to 1min 2019-10-11 15:05:18 +00:00
issue21655.go
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issue21709.go cmd/compile: more precise analysis of method values 2020-04-21 20:49:34 +00:00
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issue21934.go cmd/compile: lookup methods of base type for named pointer type 2019-10-04 18:34:18 +00:00
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issue21979.go cmd/compile: report more precise errors about untyped constants 2019-09-09 22:12:15 +00:00
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issue22326.go cmd/compile: fix package initialization ordering 2019-05-29 20:29:04 +00:00
issue22326.out cmd/compile: fix package initialization ordering 2019-05-29 20:29:04 +00:00
issue22327.go
issue22344.go cmd/compile: allow iota inside function in a ConstSpec 2019-09-12 06:46:57 +00:00
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issue23116.go cmd/compile/internal/gc: reword "declared and not used" error message 2019-10-28 23:34:13 +00:00
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issue23823.go cmd/compile: simplify {defer,resume}checkwidth logic 2019-09-03 17:38:32 +00:00
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issue24339.go all: fix typos 2019-09-08 17:28:20 +00:00
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issue24651a.go cmd/compile: output cost while inlining function with Debug['m'] > 1 2020-02-26 14:44:24 +00:00
issue24651b.go cmd/compile: output cost while inlining function with Debug['m'] > 1 2020-02-26 14:44:24 +00:00
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issue25727.go cmd/compile: improve error when setting unexported fields 2020-05-08 20:44:01 +00:00
issue25741.go
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issue25897a.go runtime: get map of args of unstarted goroutines like we do for defers 2019-06-03 18:50:30 +00:00
issue25897b.go runtime: get map of args of unstarted goroutines like we do for defers 2019-06-03 18:50:30 +00:00
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issue27557.go cmd/compile: more precise analysis of method values 2020-04-21 20:49:34 +00:00
issue27595.go
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issue27718.go test/fixedbugs: add more test cases to issue #27718 2019-08-28 02:29:42 +00:00
issue27732a.go test: remove -newescape from regress tests 2019-08-28 19:27:20 +00:00
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issue28748.go reflect: special-case panic message when returning Value{} from MakeFunc function 2019-05-06 21:23:29 +00:00
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issue29218.go cmd/compile: process blocks containing only dead values in fuseIf 2019-05-28 17:13:46 +00:00
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issue29312.go cmd/compile: give every really deep type a unique name 2020-01-08 18:43:55 +00:00
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issue29504.go cmd/compile: fix line numbers for index panics 2019-04-30 21:30:30 +00:00
issue29562.go
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issue29612.go test/fixedbugs: fix some tests will not be run 2019-05-23 01:39:41 +00:00
issue29735.go
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issue29870b.go cmd/compile/internal/gc: reword "declared and not used" error message 2019-10-28 23:34:13 +00:00
issue29919.go
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issue30085.go cmd/compile: return assignment mismatch error in var declarations 2019-04-03 21:14:58 +00:00
issue30087.go
issue30116.go cmd/compile,runtime: provide index information on bounds check failure 2019-03-18 17:33:38 +00:00
issue30116.out cmd/compile,runtime: provide index information on bounds check failure 2019-03-18 17:33:38 +00:00
issue30116u.go cmd/compile,runtime: provide index information on bounds check failure 2019-03-18 17:33:38 +00:00
issue30116u.out cmd/compile,runtime: provide index information on bounds check failure 2019-03-18 17:33:38 +00:00
issue30243.go
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issue30606b.go reflect: fix more issues with StructOf GC programs 2019-03-07 00:06:12 +00:00
issue30659.go test: add new test for gccgo compilation problem 2019-03-12 00:04:59 +00:00
issue30679.go cmd/compile: add handling for new floating-point comparisons flags 2019-03-12 14:01:26 +00:00
issue30709.go cmd/compile: fix const declaration group broken with closure 2019-04-16 19:07:42 +00:00
issue30709.out cmd/compile: fix const declaration group broken with closure 2019-04-16 19:07:42 +00:00
issue30722.go cmd/compile: don't report redundant error for invalid integer literals 2019-03-12 22:59:12 +00:00
issue30862.go test: new test for issue 30862 2019-03-15 19:05:53 +00:00
issue30898.go test: add escape regress for empty variadic function 2019-04-17 17:05:53 +00:00
issue30907.go cmd/compile: fix importing rewritten f(g()) calls 2019-03-18 19:43:38 +00:00
issue30908.go test: fix fixedbugs/issue30908.go to work with no-opt builder 2019-03-27 17:53:36 +00:00
issue30956.go cmd/compile: fix literal struct interface {} lost passing by value 2019-03-27 17:28:06 +00:00
issue30956.out cmd/compile: fix literal struct interface {} lost passing by value 2019-03-27 17:28:06 +00:00
issue30977.go cmd/compile: copy volatile values before emitting write barrier call 2019-03-21 21:05:13 +00:00
issue31010.go cmd/compile: fix "append outside assignment" ICE 2019-03-26 02:20:09 +00:00
issue31053.go cmd/compile: improve error when setting unexported fields 2020-05-08 20:44:01 +00:00
issue31060.go cmd/compile: fix ICE from invalid operations on float/complex constants 2019-03-28 17:46:55 +00:00
issue31252.go cmd/compile: use correct package name for stack object symbol 2019-04-22 17:40:48 +00:00
issue31412a.go test: add testcases for gccgo bug 2019-04-11 20:17:26 +00:00
issue31412b.go test: add testcases for gccgo bug 2019-04-11 20:17:26 +00:00
issue31419.go runtime: set itab.fun[0] only on successful conversion 2019-04-11 18:59:57 +00:00
issue31546.go cmd/compile: don't initialize blank struct fields 2019-04-25 01:30:56 +00:00
issue31573.go cmd/compile: use fixVariadicCall in escape analysis 2020-04-23 22:02:12 +00:00
issue31636.go runtime: revert init order changes 2019-05-22 11:07:00 +00:00
issue31636.out runtime: revert init order changes 2019-05-22 11:07:00 +00:00
issue31637.go test: new test for issue 31637 2019-04-24 19:55:13 +00:00
issue31747.go cmd/compile: better error message for language version errors 2019-10-03 04:48:44 +00:00
issue31777.go cmd/compile: fix maplit init panics for dynamic entry 2019-05-01 21:14:28 +00:00
issue31782.go cmd/compile: fix isStaticCompositeLiteral reports wrong for struct field 2019-05-03 03:49:11 +00:00
issue31782.out cmd/compile: fix isStaticCompositeLiteral reports wrong for struct field 2019-05-03 03:49:11 +00:00
issue31915.go cmd/compile: correct the argument type in SETXXstore -> MOVBstore rules on AMD64 2019-05-13 19:04:43 +00:00
issue31959.go cmd/compile: fix typecheck type alias makes wrong export symbol metadata 2019-05-21 17:44:21 +00:00
issue31959.out cmd/compile: fix typecheck type alias makes wrong export symbol metadata 2019-05-21 17:44:21 +00:00
issue31987.go cmd/compile: make sure to initialize static entries of slices 2019-05-14 16:36:38 +00:00
issue32133.go cmd/compile/internal/syntax: better scanner error messages 2020-03-05 00:40:38 +00:00
issue32175.go cmd/compile: fix capture-by-reference of return parameters 2019-05-22 18:43:09 +00:00
issue32175.out cmd/compile: fix capture-by-reference of return parameters 2019-05-22 18:43:09 +00:00
issue32187.go cmd/compile: ensure interface-to-concrete comparison panics when it should 2019-08-28 19:45:00 +00:00
issue32288.go cmd/compile: don't move nil checks across a VarDef 2019-05-31 21:52:17 +00:00
issue32347.go test: add a test for gccgo bug #32347 2019-05-31 19:57:27 +00:00
issue32454.go cmd/compile: optimize more pointer comparisons 2019-08-29 19:35:18 +00:00
issue32477.go cmd/link: fix deferreturn detector 2019-06-07 18:51:04 +00:00
issue32560.go cmd/compile: fix range analysis of small signed integers 2019-06-12 18:03:46 +00:00
issue32595.go cmd/compile: don't mark argument array as noalg 2019-06-25 21:30:39 +00:00
issue32680.go cmd/compile: add necessary operand to mergePoint in rewrite rules 2019-06-20 16:56:47 +00:00
issue32680.out cmd/compile: add necessary operand to mergePoint in rewrite rules 2019-06-20 16:56:47 +00:00
issue32680b.go test: add another test for issue 32680 2019-07-05 12:11:36 +00:00
issue32723.go cmd/compile: fix internal error on complex comparison 2019-08-29 18:24:31 +00:00
issue32778.go test: add testcase for gccgo compile failure 2019-07-02 16:34:55 +00:00
issue32901.go test: add a test for gccgo bug #32901 2019-07-03 14:12:22 +00:00
issue32922.go test: add new test case for gccgo compiler bug 2019-07-08 13:20:23 +00:00
issue32959.go cmd/compile: fix unsafeValue handles OLSH/ORSH wrong 2019-07-09 01:49:44 +00:00
issue33013.go test: new testcase for gccgo compiler bug 2019-07-10 18:26:53 +00:00
issue33020.go test: new testcase for gccgo bug 2019-07-18 11:34:23 +00:00
issue33020a.go test: new testcase for gollvm bug 2019-08-29 15:21:31 +00:00
issue33062.go test: add a test for gccgo bug #33062. 2019-07-11 22:30:42 +00:00
issue33158.go test: new testcase for gccgo bug 2019-07-18 17:24:59 +00:00
issue33219.go test: new testcase for gccgo compiler failure 2019-07-23 12:39:03 +00:00
issue33275_run.go internal/fmtsort: don't out-of-bounds panic if there's a race condition 2019-08-30 05:41:23 +00:00
issue33275.go internal/fmtsort: don't out-of-bounds panic if there's a race condition 2019-08-30 05:41:23 +00:00
issue33355.go cmd/compile: don't eliminate all registers when restricting to desired ones 2019-08-01 02:15:18 +00:00
issue33386.go cmd/compile/internal/syntax: better error recovery after missing expression 2019-08-27 15:46:41 +00:00
issue33438.go cmd/compile: fix crash on write barrier insertion 2019-08-02 19:35:37 +00:00
issue33460.go cmd/compile: fix "previous" position info for duplicate switch cases 2019-08-27 19:53:05 +00:00
issue33555.go cmd/link: increase the function call limit in stkcheck 2019-08-09 20:22:03 +00:00
issue33724.go cmd/compile: preserve statements in late nilcheckelim optimization 2019-10-15 16:43:44 +00:00
issue33739.go test: add test that failed with gccgo 2019-08-28 18:35:32 +00:00
issue33866.go test: add test that failed with gccgo 2019-09-06 12:11:17 +00:00
issue33903.go cmd/compile: handle infinite loops in shortcircuit pass 2019-08-29 17:41:49 +00:00
issue34123.go runtime: fix line number for faulting instructions 2019-11-08 21:05:17 +00:00
issue34329.go cmd/compile: require -lang=go1.14 for overlapping interfaces 2019-09-16 19:43:54 +00:00
issue34395.go cmd/link: produce valid binaries with large data section on wasm 2019-10-07 18:09:29 +00:00
issue34503.go test: add testcase for gccgo compiler buglet 2019-09-25 18:10:57 +00:00
issue34520.go test: add testcase for Issue 34520 2019-10-04 15:04:57 +00:00
issue34577.go test: new testcase for gccgo compiler problem 2019-10-09 17:26:20 +00:00
issue34723.go cmd/compile: improve write barrier removal 2019-10-07 17:19:13 +00:00
issue34966.go cmd/compile: fix -d=checkptr for named unsafe.Pointer types 2019-10-17 21:10:22 +00:00
issue34968.go cmd/compile: disable checkptr for //go:cgo_unsafe_args functions 2019-10-17 22:27:31 +00:00
issue35027.go cmd/compile: recognize reflect.{Slice,String}Header for -d=checkptr 2019-10-21 20:51:06 +00:00
issue35073.go cmd/compile: don't inline reflect.Value.UnsafeAddr/Pointer if enable checkptr 2020-04-01 06:12:05 +00:00
issue35157.go test: add test for fixed internal compiler error 2019-10-26 08:29:23 +00:00
issue35291.go cmd/compile: make duplicate index error distinguish arrays and slices 2019-11-01 01:51:26 +00:00
issue35518.go test: add another test case for #35518 2019-11-12 21:02:24 +00:00
issue35576.go cmd/compile: allow print/println(f()) where f() is multi-value 2020-02-22 03:34:22 +00:00
issue35576.out cmd/compile: allow print/println(f()) where f() is multi-value 2020-02-22 03:34:22 +00:00
issue35586.go test: new test for gollvm compiler crash bug 2019-11-18 21:19:53 +00:00
issue35652.go cmd/compile: try harder to not use an empty src.XPos for a bogus line 2019-11-22 03:06:22 +00:00
issue36085.go test: add a test for gccgo compiler bug of missing type descriptor 2019-12-11 19:48:39 +00:00
issue36259.go cmd/compile: avoid memmove -> SSA move rewrite when size is negative 2020-02-24 20:23:14 +00:00
issue36437.go cmd/compile: omit file:pos for non-existent errors 2020-05-08 20:28:57 +00:00
issue36516.go test: disable test for #36516 when cgo is not enabled 2020-01-19 20:36:10 +00:00
issue36705.go runtime/cgo: fix unsetenv wrapper 2020-02-24 21:32:48 +00:00
issue36723.go cmd/compile: on PPC64, fold offset into some loads/stores only when offset is 4-aligned 2020-01-27 16:13:58 +00:00
issue37246.go cmd/compile: add test for issue 37246 2020-05-14 15:18:29 +00:00
issue37513.go runtime: print instruction bytes when reporting a SIGILL 2020-03-02 18:46:06 +00:00
issue37716.go runtime: make typehash match compiler generated hashes exactly 2020-03-10 16:26:59 +00:00
issue37753.go cmd/compile: use only bit patterns in isNonNegative 2020-03-09 20:19:25 +00:00
issue37975.go cmd/compile: make isSmallMakeSlice checks slice cap only 2020-03-31 21:51:51 +00:00
issue38093.go runtime: fix race condition between timer and event handler 2020-05-31 18:35:04 +00:00
issue38117.go cmd/compile: fix constant conversion involving complex types 2020-03-31 20:59:14 +00:00
issue38356.go cmd/compile: fix incorrect block for s390x Select1 op 2020-04-14 19:01:47 +00:00
issue38359.go cmd/compile: prevent constant folding of +/- when result is NaN 2020-04-10 19:32:41 +00:00
issue38496.go test: add test for nil check / bounds check compiler confusion 2020-04-17 04:26:54 +00:00
issue38690.go cmd/compile: do not emit code for discardable blank fields 2020-05-06 04:34:54 +00:00
issue38746.go cmd/compile: restrict bit test rewrite rules 2020-05-05 15:41:37 +00:00
issue38916.go cmd/compile: fix tuple selector bug in CSE pass 2020-05-14 08:07:52 +00:00
issue39472.go cmd/compile: always tighten and de-duplicate tuple selectors 2020-06-10 14:55:29 +00:00