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go/test/inline_big.go
Matthew Dempsky 417955d151 [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 23:40:56 +00:00

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// 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
func small(a []int) int { // ERROR "can inline small with cost .* as:.*" "a does not escape"
// Cost 16 body (need cost < 20).
// See cmd/compile/internal/gc/inl.go:inlineBigFunction*
return a[0] + a[1] + a[2] + a[3]
}
func medium(a []int) int { // ERROR "can inline medium with cost .* as:.*" "a does not escape"
// 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]
}
func f(a []int) int { // ERROR "cannot inline f:.*" "a does not escape"
// 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
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a[539] = 0
a[540] = 0
a[541] = 0
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a[543] = 0
a[544] = 0
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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
x := small(a) // ERROR "inlining call to small"
y := medium(a) // The crux of this test: medium is not inlined.
return x + y
}
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