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go/test/inline_big.go

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cmd/compile: set stricter inlining threshold in large functions If we're compiling a large function, be more picky about how big the function we're inlining is. If the function is >5000 nodes, we lower the inlining threshold from a cost of 80 to 20. Turns out reflect.Value's cost is exactly 80. That's the function at issue in #26546. 20 was chosen as a proxy for "inlined body is smaller than the call would be". Simple functions still get inlined, like this one at cost 7: func ifaceIndir(t *rtype) bool { return t.kind&kindDirectIface == 0 } 5000 nodes was chosen as the big function size. Here are all the 5000+ node (~~1000+ lines) functions in the stdlib: 5187 cmd/internal/obj/arm (*ctxt5).asmout 6879 cmd/internal/obj/s390x (*ctxtz).asmout 6567 cmd/internal/obj/ppc64 (*ctxt9).asmout 9643 cmd/internal/obj/arm64 (*ctxt7).asmout 5042 cmd/internal/obj/x86 (*AsmBuf).doasm 8768 cmd/compile/internal/ssa rewriteBlockAMD64 8878 cmd/compile/internal/ssa rewriteBlockARM 8344 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_20 7916 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_30 5427 cmd/compile/internal/ssa rewriteBlockARM64 5126 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_50 6152 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_60 6412 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_70 6486 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_80 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_90 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_100 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_110 6675 cmd/compile/internal/gc typecheck1 5433 cmd/compile/internal/gc walkexpr 14070 cmd/vendor/golang.org/x/arch/arm64/arm64asm decodeArg There are a lot more smaller (~1000 node) functions in the stdlib. The function in #26546 has 12477 nodes. At some point it might be nice to have a better heuristic for "inlined body is smaller than the call", a non-cliff way to scale down the cost as the function gets bigger, doing cheaper inlined calls first, etc. All that can wait for another release. I'd like to do this CL for 1.11. Fixes #26546 Update #17566 Change-Id: Idda13020e46ec2b28d79a17217f44b189f8139ac Reviewed-on: https://go-review.googlesource.com/125516 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
2018-07-23 14:09:48 -06:00
// errorcheck -0 -m=2
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test that we restrict inlining into very large functions.
// See issue #26546.
package foo
cmd/compile: output cost while inlining function with Debug['m'] > 1 The existing implementation outputs inline cost iff function cannot be inlined with Debug['m'] > 1, the cost info is also useful if the function is inlineable. Fixes #36780 Change-Id: Ic96f6baf96aee25fb4b33d31d4d644dc2310e536 Reviewed-on: https://go-review.googlesource.com/c/go/+/216778 Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2020-01-28 20:47:49 -07:00
func small(a []int) int { // ERROR "can inline small with cost .* as:.*" "a does not escape"
cmd/compile: set stricter inlining threshold in large functions If we're compiling a large function, be more picky about how big the function we're inlining is. If the function is >5000 nodes, we lower the inlining threshold from a cost of 80 to 20. Turns out reflect.Value's cost is exactly 80. That's the function at issue in #26546. 20 was chosen as a proxy for "inlined body is smaller than the call would be". Simple functions still get inlined, like this one at cost 7: func ifaceIndir(t *rtype) bool { return t.kind&kindDirectIface == 0 } 5000 nodes was chosen as the big function size. Here are all the 5000+ node (~~1000+ lines) functions in the stdlib: 5187 cmd/internal/obj/arm (*ctxt5).asmout 6879 cmd/internal/obj/s390x (*ctxtz).asmout 6567 cmd/internal/obj/ppc64 (*ctxt9).asmout 9643 cmd/internal/obj/arm64 (*ctxt7).asmout 5042 cmd/internal/obj/x86 (*AsmBuf).doasm 8768 cmd/compile/internal/ssa rewriteBlockAMD64 8878 cmd/compile/internal/ssa rewriteBlockARM 8344 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_20 7916 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_30 5427 cmd/compile/internal/ssa rewriteBlockARM64 5126 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_50 6152 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_60 6412 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_70 6486 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_80 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_90 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_100 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_110 6675 cmd/compile/internal/gc typecheck1 5433 cmd/compile/internal/gc walkexpr 14070 cmd/vendor/golang.org/x/arch/arm64/arm64asm decodeArg There are a lot more smaller (~1000 node) functions in the stdlib. The function in #26546 has 12477 nodes. At some point it might be nice to have a better heuristic for "inlined body is smaller than the call", a non-cliff way to scale down the cost as the function gets bigger, doing cheaper inlined calls first, etc. All that can wait for another release. I'd like to do this CL for 1.11. Fixes #26546 Update #17566 Change-Id: Idda13020e46ec2b28d79a17217f44b189f8139ac Reviewed-on: https://go-review.googlesource.com/125516 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
2018-07-23 14:09:48 -06:00
// Cost 16 body (need cost < 20).
// See cmd/compile/internal/gc/inl.go:inlineBigFunction*
return a[0] + a[1] + a[2] + a[3]
}
cmd/compile: output cost while inlining function with Debug['m'] > 1 The existing implementation outputs inline cost iff function cannot be inlined with Debug['m'] > 1, the cost info is also useful if the function is inlineable. Fixes #36780 Change-Id: Ic96f6baf96aee25fb4b33d31d4d644dc2310e536 Reviewed-on: https://go-review.googlesource.com/c/go/+/216778 Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2020-01-28 20:47:49 -07:00
func medium(a []int) int { // ERROR "can inline medium with cost .* as:.*" "a does not escape"
cmd/compile: set stricter inlining threshold in large functions If we're compiling a large function, be more picky about how big the function we're inlining is. If the function is >5000 nodes, we lower the inlining threshold from a cost of 80 to 20. Turns out reflect.Value's cost is exactly 80. That's the function at issue in #26546. 20 was chosen as a proxy for "inlined body is smaller than the call would be". Simple functions still get inlined, like this one at cost 7: func ifaceIndir(t *rtype) bool { return t.kind&kindDirectIface == 0 } 5000 nodes was chosen as the big function size. Here are all the 5000+ node (~~1000+ lines) functions in the stdlib: 5187 cmd/internal/obj/arm (*ctxt5).asmout 6879 cmd/internal/obj/s390x (*ctxtz).asmout 6567 cmd/internal/obj/ppc64 (*ctxt9).asmout 9643 cmd/internal/obj/arm64 (*ctxt7).asmout 5042 cmd/internal/obj/x86 (*AsmBuf).doasm 8768 cmd/compile/internal/ssa rewriteBlockAMD64 8878 cmd/compile/internal/ssa rewriteBlockARM 8344 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_20 7916 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_30 5427 cmd/compile/internal/ssa rewriteBlockARM64 5126 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_50 6152 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_60 6412 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_70 6486 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_80 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_90 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_100 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_110 6675 cmd/compile/internal/gc typecheck1 5433 cmd/compile/internal/gc walkexpr 14070 cmd/vendor/golang.org/x/arch/arm64/arm64asm decodeArg There are a lot more smaller (~1000 node) functions in the stdlib. The function in #26546 has 12477 nodes. At some point it might be nice to have a better heuristic for "inlined body is smaller than the call", a non-cliff way to scale down the cost as the function gets bigger, doing cheaper inlined calls first, etc. All that can wait for another release. I'd like to do this CL for 1.11. Fixes #26546 Update #17566 Change-Id: Idda13020e46ec2b28d79a17217f44b189f8139ac Reviewed-on: https://go-review.googlesource.com/125516 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
2018-07-23 14:09:48 -06:00
// Cost 32 body (need cost > 20 and cost < 80).
// See cmd/compile/internal/gc/inl.go:inlineBigFunction*
return a[0] + a[1] + a[2] + a[3] + a[4] + a[5] + a[6] + a[7]
}
cmd/compile: flag 'large' functions when -m=2+ in effect When -m=N (where N > 1) is in effect, include a note in the trace output if a given function is considered "big" during inlining analysis, since this causes the inliner to be less aggressive. If a small change to a large function happens to nudge it over the large function threshold, it can be confusing for developers, thus it's probably worth including this info in the remark output. Change-Id: Id31a1b76371ab1ef9265ba28a377f97b0247d0a7 Reviewed-on: https://go-review.googlesource.com/c/go/+/460317 Reviewed-by: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Than McIntosh <thanm@google.com> Reviewed-by: Keith Randall <khr@google.com>
2023-01-03 11:11:10 -07:00
func f(a []int) int { // ERROR "cannot inline f:.*" "a does not escape" "function f considered 'big'"
cmd/compile: set stricter inlining threshold in large functions If we're compiling a large function, be more picky about how big the function we're inlining is. If the function is >5000 nodes, we lower the inlining threshold from a cost of 80 to 20. Turns out reflect.Value's cost is exactly 80. That's the function at issue in #26546. 20 was chosen as a proxy for "inlined body is smaller than the call would be". Simple functions still get inlined, like this one at cost 7: func ifaceIndir(t *rtype) bool { return t.kind&kindDirectIface == 0 } 5000 nodes was chosen as the big function size. Here are all the 5000+ node (~~1000+ lines) functions in the stdlib: 5187 cmd/internal/obj/arm (*ctxt5).asmout 6879 cmd/internal/obj/s390x (*ctxtz).asmout 6567 cmd/internal/obj/ppc64 (*ctxt9).asmout 9643 cmd/internal/obj/arm64 (*ctxt7).asmout 5042 cmd/internal/obj/x86 (*AsmBuf).doasm 8768 cmd/compile/internal/ssa rewriteBlockAMD64 8878 cmd/compile/internal/ssa rewriteBlockARM 8344 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_20 7916 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_30 5427 cmd/compile/internal/ssa rewriteBlockARM64 5126 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_50 6152 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_60 6412 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_70 6486 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_80 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_90 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_100 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_110 6675 cmd/compile/internal/gc typecheck1 5433 cmd/compile/internal/gc walkexpr 14070 cmd/vendor/golang.org/x/arch/arm64/arm64asm decodeArg There are a lot more smaller (~1000 node) functions in the stdlib. The function in #26546 has 12477 nodes. At some point it might be nice to have a better heuristic for "inlined body is smaller than the call", a non-cliff way to scale down the cost as the function gets bigger, doing cheaper inlined calls first, etc. All that can wait for another release. I'd like to do this CL for 1.11. Fixes #26546 Update #17566 Change-Id: Idda13020e46ec2b28d79a17217f44b189f8139ac Reviewed-on: https://go-review.googlesource.com/125516 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
2018-07-23 14:09:48 -06:00
// Add lots of nodes to f's body. We need >5000.
// See cmd/compile/internal/gc/inl.go:inlineBigFunction*
a[0] = 0
a[1] = 0
a[2] = 0
a[3] = 0
a[4] = 0
a[5] = 0
a[6] = 0
a[7] = 0
a[8] = 0
a[9] = 0
a[10] = 0
a[11] = 0
a[12] = 0
a[13] = 0
a[14] = 0
a[15] = 0
a[16] = 0
a[17] = 0
a[18] = 0
a[19] = 0
a[20] = 0
a[21] = 0
a[22] = 0
a[23] = 0
a[24] = 0
a[25] = 0
a[26] = 0
a[27] = 0
a[28] = 0
a[29] = 0
a[30] = 0
a[31] = 0
a[32] = 0
a[33] = 0
a[34] = 0
a[35] = 0
a[36] = 0
a[37] = 0
a[38] = 0
a[39] = 0
a[40] = 0
a[41] = 0
a[42] = 0
a[43] = 0
a[44] = 0
a[45] = 0
a[46] = 0
a[47] = 0
a[48] = 0
a[49] = 0
a[50] = 0
a[51] = 0
a[52] = 0
a[53] = 0
a[54] = 0
a[55] = 0
a[56] = 0
a[57] = 0
a[58] = 0
a[59] = 0
a[60] = 0
a[61] = 0
a[62] = 0
a[63] = 0
a[64] = 0
a[65] = 0
a[66] = 0
a[67] = 0
a[68] = 0
a[69] = 0
a[70] = 0
a[71] = 0
a[72] = 0
a[73] = 0
a[74] = 0
a[75] = 0
a[76] = 0
a[77] = 0
a[78] = 0
a[79] = 0
a[80] = 0
a[81] = 0
a[82] = 0
a[83] = 0
a[84] = 0
a[85] = 0
a[86] = 0
a[87] = 0
a[88] = 0
a[89] = 0
a[90] = 0
a[91] = 0
a[92] = 0
a[93] = 0
a[94] = 0
a[95] = 0
a[96] = 0
a[97] = 0
a[98] = 0
a[99] = 0
a[100] = 0
a[101] = 0
a[102] = 0
a[103] = 0
a[104] = 0
a[105] = 0
a[106] = 0
a[107] = 0
a[108] = 0
a[109] = 0
a[110] = 0
a[111] = 0
a[112] = 0
a[113] = 0
a[114] = 0
a[115] = 0
a[116] = 0
a[117] = 0
a[118] = 0
a[119] = 0
a[120] = 0
a[121] = 0
a[122] = 0
a[123] = 0
a[124] = 0
a[125] = 0
a[126] = 0
a[127] = 0
a[128] = 0
a[129] = 0
a[130] = 0
a[131] = 0
a[132] = 0
a[133] = 0
a[134] = 0
a[135] = 0
a[136] = 0
a[137] = 0
a[138] = 0
a[139] = 0
a[140] = 0
a[141] = 0
a[142] = 0
a[143] = 0
a[144] = 0
a[145] = 0
a[146] = 0
a[147] = 0
a[148] = 0
a[149] = 0
a[150] = 0
a[151] = 0
a[152] = 0
a[153] = 0
a[154] = 0
a[155] = 0
a[156] = 0
a[157] = 0
a[158] = 0
a[159] = 0
a[160] = 0
a[161] = 0
a[162] = 0
a[163] = 0
a[164] = 0
a[165] = 0
a[166] = 0
a[167] = 0
a[168] = 0
a[169] = 0
a[170] = 0
a[171] = 0
a[172] = 0
a[173] = 0
a[174] = 0
a[175] = 0
a[176] = 0
a[177] = 0
a[178] = 0
a[179] = 0
a[180] = 0
a[181] = 0
a[182] = 0
a[183] = 0
a[184] = 0
a[185] = 0
a[186] = 0
a[187] = 0
a[188] = 0
a[189] = 0
a[190] = 0
a[191] = 0
a[192] = 0
a[193] = 0
a[194] = 0
a[195] = 0
a[196] = 0
a[197] = 0
a[198] = 0
a[199] = 0
a[200] = 0
a[201] = 0
a[202] = 0
a[203] = 0
a[204] = 0
a[205] = 0
a[206] = 0
a[207] = 0
a[208] = 0
a[209] = 0
a[210] = 0
a[211] = 0
a[212] = 0
a[213] = 0
a[214] = 0
a[215] = 0
a[216] = 0
a[217] = 0
a[218] = 0
a[219] = 0
a[220] = 0
a[221] = 0
a[222] = 0
a[223] = 0
a[224] = 0
a[225] = 0
a[226] = 0
a[227] = 0
a[228] = 0
a[229] = 0
a[230] = 0
a[231] = 0
a[232] = 0
a[233] = 0
a[234] = 0
a[235] = 0
a[236] = 0
a[237] = 0
a[238] = 0
a[239] = 0
a[240] = 0
a[241] = 0
a[242] = 0
a[243] = 0
a[244] = 0
a[245] = 0
a[246] = 0
a[247] = 0
a[248] = 0
a[249] = 0
a[250] = 0
a[251] = 0
a[252] = 0
a[253] = 0
a[254] = 0
a[255] = 0
a[256] = 0
a[257] = 0
a[258] = 0
a[259] = 0
a[260] = 0
a[261] = 0
a[262] = 0
a[263] = 0
a[264] = 0
a[265] = 0
a[266] = 0
a[267] = 0
a[268] = 0
a[269] = 0
a[270] = 0
a[271] = 0
a[272] = 0
a[273] = 0
a[274] = 0
a[275] = 0
a[276] = 0
a[277] = 0
a[278] = 0
a[279] = 0
a[280] = 0
a[281] = 0
a[282] = 0
a[283] = 0
a[284] = 0
a[285] = 0
a[286] = 0
a[287] = 0
a[288] = 0
a[289] = 0
a[290] = 0
a[291] = 0
a[292] = 0
a[293] = 0
a[294] = 0
a[295] = 0
a[296] = 0
a[297] = 0
a[298] = 0
a[299] = 0
a[300] = 0
a[301] = 0
a[302] = 0
a[303] = 0
a[304] = 0
a[305] = 0
a[306] = 0
a[307] = 0
a[308] = 0
a[309] = 0
a[310] = 0
a[311] = 0
a[312] = 0
a[313] = 0
a[314] = 0
a[315] = 0
a[316] = 0
a[317] = 0
a[318] = 0
a[319] = 0
a[320] = 0
a[321] = 0
a[322] = 0
a[323] = 0
a[324] = 0
a[325] = 0
a[326] = 0
a[327] = 0
a[328] = 0
a[329] = 0
a[330] = 0
a[331] = 0
a[332] = 0
a[333] = 0
a[334] = 0
a[335] = 0
a[336] = 0
a[337] = 0
a[338] = 0
a[339] = 0
a[340] = 0
a[341] = 0
a[342] = 0
a[343] = 0
a[344] = 0
a[345] = 0
a[346] = 0
a[347] = 0
a[348] = 0
a[349] = 0
a[350] = 0
a[351] = 0
a[352] = 0
a[353] = 0
a[354] = 0
a[355] = 0
a[356] = 0
a[357] = 0
a[358] = 0
a[359] = 0
a[360] = 0
a[361] = 0
a[362] = 0
a[363] = 0
a[364] = 0
a[365] = 0
a[366] = 0
a[367] = 0
a[368] = 0
a[369] = 0
a[370] = 0
a[371] = 0
a[372] = 0
a[373] = 0
a[374] = 0
a[375] = 0
a[376] = 0
a[377] = 0
a[378] = 0
a[379] = 0
a[380] = 0
a[381] = 0
a[382] = 0
a[383] = 0
a[384] = 0
a[385] = 0
a[386] = 0
a[387] = 0
a[388] = 0
a[389] = 0
a[390] = 0
a[391] = 0
a[392] = 0
a[393] = 0
a[394] = 0
a[395] = 0
a[396] = 0
a[397] = 0
a[398] = 0
a[399] = 0
a[400] = 0
a[401] = 0
a[402] = 0
a[403] = 0
a[404] = 0
a[405] = 0
a[406] = 0
a[407] = 0
a[408] = 0
a[409] = 0
a[410] = 0
a[411] = 0
a[412] = 0
a[413] = 0
a[414] = 0
a[415] = 0
a[416] = 0
a[417] = 0
a[418] = 0
a[419] = 0
a[420] = 0
a[421] = 0
a[422] = 0
a[423] = 0
a[424] = 0
a[425] = 0
a[426] = 0
a[427] = 0
a[428] = 0
a[429] = 0
a[430] = 0
a[431] = 0
a[432] = 0
a[433] = 0
a[434] = 0
a[435] = 0
a[436] = 0
a[437] = 0
a[438] = 0
a[439] = 0
a[440] = 0
a[441] = 0
a[442] = 0
a[443] = 0
a[444] = 0
a[445] = 0
a[446] = 0
a[447] = 0
a[448] = 0
a[449] = 0
a[450] = 0
a[451] = 0
a[452] = 0
a[453] = 0
a[454] = 0
a[455] = 0
a[456] = 0
a[457] = 0
a[458] = 0
a[459] = 0
a[460] = 0
a[461] = 0
a[462] = 0
a[463] = 0
a[464] = 0
a[465] = 0
a[466] = 0
a[467] = 0
a[468] = 0
a[469] = 0
a[470] = 0
a[471] = 0
a[472] = 0
a[473] = 0
a[474] = 0
a[475] = 0
a[476] = 0
a[477] = 0
a[478] = 0
a[479] = 0
a[480] = 0
a[481] = 0
a[482] = 0
a[483] = 0
a[484] = 0
a[485] = 0
a[486] = 0
a[487] = 0
a[488] = 0
a[489] = 0
a[490] = 0
a[491] = 0
a[492] = 0
a[493] = 0
a[494] = 0
a[495] = 0
a[496] = 0
a[497] = 0
a[498] = 0
a[499] = 0
a[500] = 0
a[501] = 0
a[502] = 0
a[503] = 0
a[504] = 0
a[505] = 0
a[506] = 0
a[507] = 0
a[508] = 0
a[509] = 0
a[510] = 0
a[511] = 0
a[512] = 0
a[513] = 0
a[514] = 0
a[515] = 0
a[516] = 0
a[517] = 0
a[518] = 0
a[519] = 0
a[520] = 0
a[521] = 0
a[522] = 0
a[523] = 0
a[524] = 0
a[525] = 0
a[526] = 0
a[527] = 0
a[528] = 0
a[529] = 0
a[530] = 0
a[531] = 0
a[532] = 0
a[533] = 0
a[534] = 0
a[535] = 0
a[536] = 0
a[537] = 0
a[538] = 0
a[539] = 0
a[540] = 0
a[541] = 0
a[542] = 0
a[543] = 0
a[544] = 0
a[545] = 0
a[546] = 0
a[547] = 0
a[548] = 0
a[549] = 0
a[550] = 0
a[551] = 0
a[552] = 0
a[553] = 0
a[554] = 0
a[555] = 0
a[556] = 0
a[557] = 0
a[558] = 0
a[559] = 0
a[560] = 0
a[561] = 0
a[562] = 0
a[563] = 0
a[564] = 0
a[565] = 0
a[566] = 0
a[567] = 0
a[568] = 0
a[569] = 0
a[570] = 0
a[571] = 0
a[572] = 0
a[573] = 0
a[574] = 0
a[575] = 0
a[576] = 0
a[577] = 0
a[578] = 0
a[579] = 0
a[580] = 0
a[581] = 0
a[582] = 0
a[583] = 0
a[584] = 0
a[585] = 0
a[586] = 0
a[587] = 0
a[588] = 0
a[589] = 0
a[590] = 0
a[591] = 0
a[592] = 0
a[593] = 0
a[594] = 0
a[595] = 0
a[596] = 0
a[597] = 0
a[598] = 0
a[599] = 0
a[600] = 0
a[601] = 0
a[602] = 0
a[603] = 0
a[604] = 0
a[605] = 0
a[606] = 0
a[607] = 0
a[608] = 0
a[609] = 0
a[610] = 0
a[611] = 0
a[612] = 0
a[613] = 0
a[614] = 0
a[615] = 0
a[616] = 0
a[617] = 0
a[618] = 0
a[619] = 0
a[620] = 0
a[621] = 0
a[622] = 0
a[623] = 0
a[624] = 0
a[625] = 0
a[626] = 0
a[627] = 0
a[628] = 0
a[629] = 0
a[630] = 0
a[631] = 0
a[632] = 0
a[633] = 0
a[634] = 0
a[635] = 0
a[636] = 0
a[637] = 0
a[638] = 0
a[639] = 0
a[640] = 0
a[641] = 0
a[642] = 0
a[643] = 0
a[644] = 0
a[645] = 0
a[646] = 0
a[647] = 0
a[648] = 0
a[649] = 0
a[650] = 0
a[651] = 0
a[652] = 0
a[653] = 0
a[654] = 0
a[655] = 0
a[656] = 0
a[657] = 0
a[658] = 0
a[659] = 0
a[660] = 0
a[661] = 0
a[662] = 0
a[663] = 0
a[664] = 0
a[665] = 0
a[666] = 0
a[667] = 0
a[668] = 0
a[669] = 0
a[670] = 0
a[671] = 0
a[672] = 0
a[673] = 0
a[674] = 0
a[675] = 0
a[676] = 0
a[677] = 0
a[678] = 0
a[679] = 0
a[680] = 0
a[681] = 0
a[682] = 0
a[683] = 0
a[684] = 0
a[685] = 0
a[686] = 0
a[687] = 0
a[688] = 0
a[689] = 0
a[690] = 0
a[691] = 0
a[692] = 0
a[693] = 0
a[694] = 0
a[695] = 0
a[696] = 0
a[697] = 0
a[698] = 0
a[699] = 0
a[700] = 0
a[701] = 0
a[702] = 0
a[703] = 0
a[704] = 0
a[705] = 0
a[706] = 0
a[707] = 0
a[708] = 0
a[709] = 0
a[710] = 0
a[711] = 0
a[712] = 0
a[713] = 0
a[714] = 0
a[715] = 0
a[716] = 0
a[717] = 0
a[718] = 0
a[719] = 0
a[720] = 0
a[721] = 0
a[722] = 0
a[723] = 0
a[724] = 0
a[725] = 0
a[726] = 0
a[727] = 0
a[728] = 0
a[729] = 0
a[730] = 0
a[731] = 0
a[732] = 0
a[733] = 0
a[734] = 0
a[735] = 0
a[736] = 0
a[737] = 0
a[738] = 0
a[739] = 0
a[740] = 0
a[741] = 0
a[742] = 0
a[743] = 0
a[744] = 0
a[745] = 0
a[746] = 0
a[747] = 0
a[748] = 0
a[749] = 0
a[750] = 0
a[751] = 0
a[752] = 0
a[753] = 0
a[754] = 0
a[755] = 0
a[756] = 0
a[757] = 0
a[758] = 0
a[759] = 0
a[760] = 0
a[761] = 0
a[762] = 0
a[763] = 0
a[764] = 0
a[765] = 0
a[766] = 0
a[767] = 0
a[768] = 0
a[769] = 0
a[770] = 0
a[771] = 0
a[772] = 0
a[773] = 0
a[774] = 0
a[775] = 0
a[776] = 0
a[777] = 0
a[778] = 0
a[779] = 0
a[780] = 0
a[781] = 0
a[782] = 0
a[783] = 0
a[784] = 0
a[785] = 0
a[786] = 0
a[787] = 0
a[788] = 0
a[789] = 0
a[790] = 0
a[791] = 0
a[792] = 0
a[793] = 0
a[794] = 0
a[795] = 0
a[796] = 0
a[797] = 0
a[798] = 0
a[799] = 0
a[800] = 0
a[801] = 0
a[802] = 0
a[803] = 0
a[804] = 0
a[805] = 0
a[806] = 0
a[807] = 0
a[808] = 0
a[809] = 0
a[810] = 0
a[811] = 0
a[812] = 0
a[813] = 0
a[814] = 0
a[815] = 0
a[816] = 0
a[817] = 0
a[818] = 0
a[819] = 0
a[820] = 0
a[821] = 0
a[822] = 0
a[823] = 0
a[824] = 0
a[825] = 0
a[826] = 0
a[827] = 0
a[828] = 0
a[829] = 0
a[830] = 0
a[831] = 0
a[832] = 0
a[833] = 0
a[834] = 0
a[835] = 0
a[836] = 0
a[837] = 0
a[838] = 0
a[839] = 0
a[840] = 0
a[841] = 0
a[842] = 0
a[843] = 0
a[844] = 0
a[845] = 0
a[846] = 0
a[847] = 0
a[848] = 0
a[849] = 0
a[850] = 0
a[851] = 0
a[852] = 0
a[853] = 0
a[854] = 0
a[855] = 0
a[856] = 0
a[857] = 0
a[858] = 0
a[859] = 0
a[860] = 0
a[861] = 0
a[862] = 0
a[863] = 0
a[864] = 0
a[865] = 0
a[866] = 0
a[867] = 0
a[868] = 0
a[869] = 0
a[870] = 0
a[871] = 0
a[872] = 0
a[873] = 0
a[874] = 0
a[875] = 0
a[876] = 0
a[877] = 0
a[878] = 0
a[879] = 0
a[880] = 0
a[881] = 0
a[882] = 0
a[883] = 0
a[884] = 0
a[885] = 0
a[886] = 0
a[887] = 0
a[888] = 0
a[889] = 0
a[890] = 0
a[891] = 0
a[892] = 0
a[893] = 0
a[894] = 0
a[895] = 0
a[896] = 0
a[897] = 0
a[898] = 0
a[899] = 0
a[900] = 0
a[901] = 0
a[902] = 0
a[903] = 0
a[904] = 0
a[905] = 0
a[906] = 0
a[907] = 0
a[908] = 0
a[909] = 0
a[910] = 0
a[911] = 0
a[912] = 0
a[913] = 0
a[914] = 0
a[915] = 0
a[916] = 0
a[917] = 0
a[918] = 0
a[919] = 0
a[920] = 0
a[921] = 0
a[922] = 0
a[923] = 0
a[924] = 0
a[925] = 0
a[926] = 0
a[927] = 0
a[928] = 0
a[929] = 0
a[930] = 0
a[931] = 0
a[932] = 0
a[933] = 0
a[934] = 0
a[935] = 0
a[936] = 0
a[937] = 0
a[938] = 0
a[939] = 0
a[940] = 0
a[941] = 0
a[942] = 0
a[943] = 0
a[944] = 0
a[945] = 0
a[946] = 0
a[947] = 0
a[948] = 0
a[949] = 0
a[950] = 0
a[951] = 0
a[952] = 0
a[953] = 0
a[954] = 0
a[955] = 0
a[956] = 0
a[957] = 0
a[958] = 0
a[959] = 0
a[960] = 0
a[961] = 0
a[962] = 0
a[963] = 0
a[964] = 0
a[965] = 0
a[966] = 0
a[967] = 0
a[968] = 0
a[969] = 0
a[970] = 0
a[971] = 0
a[972] = 0
a[973] = 0
a[974] = 0
a[975] = 0
a[976] = 0
a[977] = 0
a[978] = 0
a[979] = 0
a[980] = 0
a[981] = 0
a[982] = 0
a[983] = 0
a[984] = 0
a[985] = 0
a[986] = 0
a[987] = 0
a[988] = 0
a[989] = 0
a[990] = 0
a[991] = 0
a[992] = 0
a[993] = 0
a[994] = 0
a[995] = 0
a[996] = 0
a[997] = 0
a[998] = 0
a[999] = 0
[dev.typeparams] cmd/compile/internal/inline: refactor mkinlcall This CL refactors mkinlcall by extracting the core InlinedCallExpr construction code into a new "oldInline" function, and adds a new "NewInline" hook point that can be overriden with a new inliner implementation that only needs to worry about the details of constructing the InlinedCallExpr. It also moves the delayretvars optimization check into CanInline, so it's performed just once per inlinable function rather than once for each inlined call. Finally, it skips printing the function body about to be inlined (and updates the couple of regress tests that expected this output). We already report the inline body as it was saved, and this diagnostic is only applicable to the current inliner, which clones existing function body instances. In the unified IR inliner, we'll directly construct inline bodies from the serialized representation. Change-Id: Ibdbe617da83c07665dcbda402cc8d4d4431dde2f Reviewed-on: https://go-review.googlesource.com/c/go/+/323290 Trust: Matthew Dempsky <mdempsky@google.com> Trust: Dan Scales <danscales@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Dan Scales <danscales@google.com>
2021-05-27 03:47:04 -06:00
x := small(a) // ERROR "inlining call to small"
cmd/compile: set stricter inlining threshold in large functions If we're compiling a large function, be more picky about how big the function we're inlining is. If the function is >5000 nodes, we lower the inlining threshold from a cost of 80 to 20. Turns out reflect.Value's cost is exactly 80. That's the function at issue in #26546. 20 was chosen as a proxy for "inlined body is smaller than the call would be". Simple functions still get inlined, like this one at cost 7: func ifaceIndir(t *rtype) bool { return t.kind&kindDirectIface == 0 } 5000 nodes was chosen as the big function size. Here are all the 5000+ node (~~1000+ lines) functions in the stdlib: 5187 cmd/internal/obj/arm (*ctxt5).asmout 6879 cmd/internal/obj/s390x (*ctxtz).asmout 6567 cmd/internal/obj/ppc64 (*ctxt9).asmout 9643 cmd/internal/obj/arm64 (*ctxt7).asmout 5042 cmd/internal/obj/x86 (*AsmBuf).doasm 8768 cmd/compile/internal/ssa rewriteBlockAMD64 8878 cmd/compile/internal/ssa rewriteBlockARM 8344 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_20 7916 cmd/compile/internal/ssa rewriteValueARM64_OpARM64OR_30 5427 cmd/compile/internal/ssa rewriteBlockARM64 5126 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_50 6152 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_60 6412 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_70 6486 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_80 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_90 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_100 6534 cmd/compile/internal/ssa rewriteValuePPC64_OpPPC64OR_110 6675 cmd/compile/internal/gc typecheck1 5433 cmd/compile/internal/gc walkexpr 14070 cmd/vendor/golang.org/x/arch/arm64/arm64asm decodeArg There are a lot more smaller (~1000 node) functions in the stdlib. The function in #26546 has 12477 nodes. At some point it might be nice to have a better heuristic for "inlined body is smaller than the call", a non-cliff way to scale down the cost as the function gets bigger, doing cheaper inlined calls first, etc. All that can wait for another release. I'd like to do this CL for 1.11. Fixes #26546 Update #17566 Change-Id: Idda13020e46ec2b28d79a17217f44b189f8139ac Reviewed-on: https://go-review.googlesource.com/125516 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
2018-07-23 14:09:48 -06:00
y := medium(a) // The crux of this test: medium is not inlined.
return x + y
}
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