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Because layout minimizes the number of tag bits used, and favors high spare bits, the spare bit representations end up overlapping the extra inhabitant representations, since we just counted down from -1. If there are fewer tag bits than total spare bits, rotate the extra inhabitant values so they correctly line up with the tag representations in this situation. rdar://problem/46468090
253 lines
15 KiB
Swift
253 lines
15 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-build-swift -parse-stdlib -Xfrontend -verify-type-layout -Xfrontend SpareBitExtraInhabitants -Xfrontend -verify-type-layout -Xfrontend SpareBitSingleExtraInhabitant -Xfrontend -verify-type-layout -Xfrontend SpareBitNoExtraInhabitant -Xfrontend -verify-type-layout -Xfrontend SpareBitNoExtraInhabitant2 -Xfrontend -verify-type-layout -Xfrontend TwoTagExtraInhabitants -Xfrontend -verify-type-layout -Xfrontend ThreeTagExtraInhabitants -Xfrontend -verify-type-layout -Xfrontend NoTagExtraInhabitants -Xfrontend -verify-type-layout -Xfrontend DynamicExtraInhabitantsNever -Xfrontend -verify-type-layout -Xfrontend DynamicExtraInhabitantsZeroBytes -Xfrontend -verify-type-layout -Xfrontend DynamicExtraInhabitantsOneByte -Xfrontend -verify-type-layout -Xfrontend DynamicExtraInhabitantsTwoBytes -Xfrontend -verify-type-layout -Xfrontend MoreSpareBitsThanTagsExtraInhabitants -Xfrontend -verify-type-layout -Xfrontend OptOptMoreSpareBitsThanTagsExtraInhabitants -O -o %t/a.out %s
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// RUN: %target-run %t/a.out 2>&1
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// Type layout verifier is only compiled into the runtime in asserts builds.
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// REQUIRES: swift_stdlib_asserts
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// REQUIRES: executable_test
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// CHECK-NOT: Type verification
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import Swift
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import StdlibUnittest
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enum SpareBitExtraInhabitants {
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case a(Builtin.Int30)
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case b(Builtin.Int30)
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}
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enum SpareBitSingleExtraInhabitant {
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case a(Builtin.Int30)
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case b(Builtin.Int30)
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case c(Builtin.Int30)
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}
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enum SpareBitNoExtraInhabitant {
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case a(Builtin.Int30)
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case b(Builtin.Int30)
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case c(Builtin.Int30)
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case d(Builtin.Int30)
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}
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enum SpareBitNoExtraInhabitant2 {
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case a(Builtin.Int30)
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case b(Builtin.Int30)
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case c(Builtin.Int30)
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case d
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}
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enum TwoTagExtraInhabitants {
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case a(Builtin.Int32)
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case b(Builtin.Int32)
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}
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enum ThreeTagExtraInhabitants {
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case a(Builtin.Int32)
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case b(Builtin.Int32)
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case c(Builtin.Int32)
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}
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enum MoreSpareBitsThanTagsExtraInhabitants {
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case a(Builtin.Int29)
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case b(Builtin.Int29)
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case c(Builtin.Int29)
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case d(Builtin.Int29)
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}
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typealias OptOptMoreSpareBitsThanTagsExtraInhabitants =
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Optional<Optional<MoreSpareBitsThanTagsExtraInhabitants>>
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enum MoreSpareBitsThanTagsExtraInhabitants2 {
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case a(Builtin.Int29)
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case b(Builtin.Int29)
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case c(Builtin.Int29)
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}
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enum NoTagExtraInhabitants {
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case aaa(Builtin.Int32), aab(Builtin.Int32), aac(Builtin.Int32), aad(Builtin.Int32), aae(Builtin.Int32), aaf(Builtin.Int32), aag(Builtin.Int32), aah(Builtin.Int32)
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case aba(Builtin.Int32), abb(Builtin.Int32), abc(Builtin.Int32), abd(Builtin.Int32), abe(Builtin.Int32), abf(Builtin.Int32), abg(Builtin.Int32), abh(Builtin.Int32)
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case aca(Builtin.Int32), acb(Builtin.Int32), acc(Builtin.Int32), acd(Builtin.Int32), ace(Builtin.Int32), acf(Builtin.Int32), acg(Builtin.Int32), ach(Builtin.Int32)
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case ada(Builtin.Int32), adb(Builtin.Int32), adc(Builtin.Int32), add(Builtin.Int32), ade(Builtin.Int32), adf(Builtin.Int32), adg(Builtin.Int32), adh(Builtin.Int32)
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case aea(Builtin.Int32), aeb(Builtin.Int32), aec(Builtin.Int32), aed(Builtin.Int32), aee(Builtin.Int32), aef(Builtin.Int32), aeg(Builtin.Int32), aeh(Builtin.Int32)
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case afa(Builtin.Int32), afb(Builtin.Int32), afc(Builtin.Int32), afd(Builtin.Int32), afe(Builtin.Int32), aff(Builtin.Int32), afg(Builtin.Int32), afh(Builtin.Int32)
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case aga(Builtin.Int32), agb(Builtin.Int32), agc(Builtin.Int32), agd(Builtin.Int32), age(Builtin.Int32), agf(Builtin.Int32), agg(Builtin.Int32), agh(Builtin.Int32)
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case aha(Builtin.Int32), ahb(Builtin.Int32), ahc(Builtin.Int32), ahd(Builtin.Int32), ahe(Builtin.Int32), ahf(Builtin.Int32), ahg(Builtin.Int32), ahh(Builtin.Int32)
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case baa(Builtin.Int32), bab(Builtin.Int32), bac(Builtin.Int32), bad(Builtin.Int32), bae(Builtin.Int32), baf(Builtin.Int32), bag(Builtin.Int32), bah(Builtin.Int32)
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case bba(Builtin.Int32), bbb(Builtin.Int32), bbc(Builtin.Int32), bbd(Builtin.Int32), bbe(Builtin.Int32), bbf(Builtin.Int32), bbg(Builtin.Int32), bbh(Builtin.Int32)
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case bca(Builtin.Int32), bcb(Builtin.Int32), bcc(Builtin.Int32), bcd(Builtin.Int32), bce(Builtin.Int32), bcf(Builtin.Int32), bcg(Builtin.Int32), bch(Builtin.Int32)
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case bda(Builtin.Int32), bdb(Builtin.Int32), bdc(Builtin.Int32), bdd(Builtin.Int32), bde(Builtin.Int32), bdf(Builtin.Int32), bdg(Builtin.Int32), bdh(Builtin.Int32)
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case bea(Builtin.Int32), beb(Builtin.Int32), bec(Builtin.Int32), bed(Builtin.Int32), bee(Builtin.Int32), bef(Builtin.Int32), beg(Builtin.Int32), beh(Builtin.Int32)
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case bfa(Builtin.Int32), bfb(Builtin.Int32), bfc(Builtin.Int32), bfd(Builtin.Int32), bfe(Builtin.Int32), bff(Builtin.Int32), bfg(Builtin.Int32), bfh(Builtin.Int32)
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case bga(Builtin.Int32), bgb(Builtin.Int32), bgc(Builtin.Int32), bgd(Builtin.Int32), bge(Builtin.Int32), bgf(Builtin.Int32), bgg(Builtin.Int32), bgh(Builtin.Int32)
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case bha(Builtin.Int32), bhb(Builtin.Int32), bhc(Builtin.Int32), bhd(Builtin.Int32), bhe(Builtin.Int32), bhf(Builtin.Int32), bhg(Builtin.Int32), bhh(Builtin.Int32)
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case caa(Builtin.Int32), cab(Builtin.Int32), cac(Builtin.Int32), cad(Builtin.Int32), cae(Builtin.Int32), caf(Builtin.Int32), cag(Builtin.Int32), cah(Builtin.Int32)
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case cba(Builtin.Int32), cbb(Builtin.Int32), cbc(Builtin.Int32), cbd(Builtin.Int32), cbe(Builtin.Int32), cbf(Builtin.Int32), cbg(Builtin.Int32), cbh(Builtin.Int32)
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case cca(Builtin.Int32), ccb(Builtin.Int32), ccc(Builtin.Int32), ccd(Builtin.Int32), cce(Builtin.Int32), ccf(Builtin.Int32), ccg(Builtin.Int32), cch(Builtin.Int32)
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case cda(Builtin.Int32), cdb(Builtin.Int32), cdc(Builtin.Int32), cdd(Builtin.Int32), cde(Builtin.Int32), cdf(Builtin.Int32), cdg(Builtin.Int32), cdh(Builtin.Int32)
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case cea(Builtin.Int32), ceb(Builtin.Int32), cec(Builtin.Int32), ced(Builtin.Int32), cee(Builtin.Int32), cef(Builtin.Int32), ceg(Builtin.Int32), ceh(Builtin.Int32)
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case cfa(Builtin.Int32), cfb(Builtin.Int32), cfc(Builtin.Int32), cfd(Builtin.Int32), cfe(Builtin.Int32), cff(Builtin.Int32), cfg(Builtin.Int32), cfh(Builtin.Int32)
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case cga(Builtin.Int32), cgb(Builtin.Int32), cgc(Builtin.Int32), cgd(Builtin.Int32), cge(Builtin.Int32), cgf(Builtin.Int32), cgg(Builtin.Int32), cgh(Builtin.Int32)
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case cha(Builtin.Int32), chb(Builtin.Int32), chc(Builtin.Int32), chd(Builtin.Int32), che(Builtin.Int32), chf(Builtin.Int32), chg(Builtin.Int32), chh(Builtin.Int32)
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case daa(Builtin.Int32), dab(Builtin.Int32), dac(Builtin.Int32), dad(Builtin.Int32), dae(Builtin.Int32), daf(Builtin.Int32), dag(Builtin.Int32), dah(Builtin.Int32)
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case dba(Builtin.Int32), dbb(Builtin.Int32), dbc(Builtin.Int32), dbd(Builtin.Int32), dbe(Builtin.Int32), dbf(Builtin.Int32), dbg(Builtin.Int32), dbh(Builtin.Int32)
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case dca(Builtin.Int32), dcb(Builtin.Int32), dcc(Builtin.Int32), dcd(Builtin.Int32), dce(Builtin.Int32), dcf(Builtin.Int32), dcg(Builtin.Int32), dch(Builtin.Int32)
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case dda(Builtin.Int32), ddb(Builtin.Int32), ddc(Builtin.Int32), ddd(Builtin.Int32), dde(Builtin.Int32), ddf(Builtin.Int32), ddg(Builtin.Int32), ddh(Builtin.Int32)
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case dea(Builtin.Int32), deb(Builtin.Int32), dec(Builtin.Int32), ded(Builtin.Int32), dee(Builtin.Int32), def(Builtin.Int32), deg(Builtin.Int32), deh(Builtin.Int32)
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case dfa(Builtin.Int32), dfb(Builtin.Int32), dfc(Builtin.Int32), dfd(Builtin.Int32), dfe(Builtin.Int32), dff(Builtin.Int32), dfg(Builtin.Int32), dfh(Builtin.Int32)
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case dga(Builtin.Int32), dgb(Builtin.Int32), dgc(Builtin.Int32), dgd(Builtin.Int32), dge(Builtin.Int32), dgf(Builtin.Int32), dgg(Builtin.Int32), dgh(Builtin.Int32)
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case dha(Builtin.Int32), dhb(Builtin.Int32), dhc(Builtin.Int32), dhd(Builtin.Int32), dhe(Builtin.Int32), dhf(Builtin.Int32), dhg(Builtin.Int32), dhh(Builtin.Int32)
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}
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enum DynamicExtraInhabitants<T> {
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case payloadA(T)
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case payloadB(T)
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case tagAAA, tagAAB, tagAAC, tagAAD, tagAAE, tagAAF, tagAAG, tagAAH
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case tagABA, tagABB, tagABC, tagABD, tagABE, tagABF, tagABG, tagABH
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case tagACA, tagACB, tagACC, tagACD, tagACE, tagACF, tagACG, tagACH
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case tagADA, tagADB, tagADC, tagADD, tagADE, tagADF, tagADG, tagADH
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case tagAEA, tagAEB, tagAEC, tagAED, tagAEE, tagAEF, tagAEG, tagAEH
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case tagAFA, tagAFB, tagAFC, tagAFD, tagAFE, tagAFF, tagAFG, tagAFH
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case tagAGA, tagAGB, tagAGC, tagAGD, tagAGE, tagAGF, tagAGG, tagAGH
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case tagAHA, tagAHB, tagAHC, tagAHD, tagAHE, tagAHF, tagAHG, tagAHH
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case tagAIA, tagAIB, tagAIC, tagAID, tagAIE, tagAIF, tagAIG, tagAIH
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case tagBAA, tagBAB, tagBAC, tagBAD, tagBAE, tagBAF, tagBAG, tagBAH
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case tagBBA, tagBBB, tagBBC, tagBBD, tagBBE, tagBBF, tagBBG, tagBBH
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case tagBCA, tagBCB, tagBCC, tagBCD, tagBCE, tagBCF, tagBCG, tagBCH
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case tagBDA, tagBDB, tagBDC, tagBDD, tagBDE, tagBDF, tagBDG, tagBDH
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case tagBEA, tagBEB, tagBEC, tagBED, tagBEE, tagBEF, tagBEG, tagBEH
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case tagBFA, tagBFB, tagBFC, tagBFD, tagBFE, tagBFF, tagBFG, tagBFH
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case tagBGA, tagBGB, tagBGC, tagBGD, tagBGE, tagBGF, tagBGG, tagBGH
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case tagBHA, tagBHB, tagBHC, tagBHD, tagBHE, tagBHF, tagBHG, tagBHH
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case tagBIA, tagBIB, tagBIC, tagBID, tagBIE, tagBIF, tagBIG, tagBIH
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case tagCAA, tagCAB, tagCAC, tagCAD, tagCAE, tagCAF, tagCAG, tagCAH
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case tagCBA, tagCBB, tagCBC, tagCBD, tagCBE, tagCBF, tagCBG, tagCBH
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case tagCCA, tagCCB, tagCCC, tagCCD, tagCCE, tagCCF, tagCCG, tagCCH
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case tagCDA, tagCDB, tagCDC, tagCDD, tagCDE, tagCDF, tagCDG, tagCDH
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case tagCEA, tagCEB, tagCEC, tagCED, tagCEE, tagCEF, tagCEG, tagCEH
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case tagCFA, tagCFB, tagCFC, tagCFD, tagCFE, tagCFF, tagCFG, tagCFH
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case tagCGA, tagCGB, tagCGC, tagCGD, tagCGE, tagCGF, tagCGG, tagCGH
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case tagCHA, tagCHB, tagCHC, tagCHD, tagCHE, tagCHF, tagCHG, tagCHH
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case tagCIA, tagCIB, tagCIC, tagCID, tagCIE, tagCIF, tagCIG, tagCIH
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case tagDAA, tagDAB, tagDAC, tagDAD, tagDAE, tagDAF, tagDAG, tagDAH
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case tagDBA, tagDBB, tagDBC, tagDBD, tagDBE, tagDBF, tagDBG, tagDBH
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case tagDCA, tagDCB, tagDCC, tagDCD, tagDCE, tagDCF, tagDCG, tagDCH
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case tagDDA, tagDDB, tagDDC, tagDDD, tagDDE, tagDDF, tagDDG, tagDDH
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case tagDEA, tagDEB, tagDEC, tagDED, tagDEE, tagDEF, tagDEG, tagDEH
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case tagDFA, tagDFB, tagDFC, tagDFD, tagDFE, tagDFF, tagDFG, tagDFH
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case tagDGA, tagDGB, tagDGC, tagDGD, tagDGE, tagDGF, tagDGG, tagDGH
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case tagDHA, tagDHB, tagDHC, tagDHD, tagDHE, tagDHF, tagDHG, tagDHH
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case tagDIA, tagDIB, tagDIC, tagDID, tagDIE, tagDIF, tagDIG, tagDIH
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}
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typealias DynamicExtraInhabitantsNever = DynamicExtraInhabitants<Never>
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typealias DynamicExtraInhabitantsZeroBytes = DynamicExtraInhabitants<()>
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typealias DynamicExtraInhabitantsOneByte = DynamicExtraInhabitants<UInt8>
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typealias DynamicExtraInhabitantsTwoBytes = DynamicExtraInhabitants<UInt16>
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var tests = TestSuite("extra inhabitants of structs")
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@inline(never)
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func expectHasAtLeastTwoExtraInhabitants<T>(_: T.Type,
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nil theNil: T??,
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someNil: T??,
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file: String = #file, line: UInt = #line) {
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expectEqual(MemoryLayout<T>.size, MemoryLayout<T??>.size,
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"\(T.self) has at least two extra inhabitants",
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file: file, line: line)
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expectNil(theNil,
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"\(T.self) extra inhabitant should agree in generic and concrete " +
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"context")
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expectNil(someNil!,
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"\(T.self) extra inhabitant should agree in generic and concrete " +
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"context")
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}
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@inline(never)
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func expectHasExtraInhabitant<T>(_: T.Type, nil theNil: T?,
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file: String = #file, line: UInt = #line) {
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expectEqual(MemoryLayout<T>.size, MemoryLayout<T?>.size,
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"\(T.self) has extra inhabitant",
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file: file, line: line)
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expectNil(theNil,
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"\(T.self) extra inhabitant should agree in generic and concrete " +
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"context")
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}
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func expectHasNoExtraInhabitant<T>(_: T.Type,
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file: String = #file, line: UInt = #line) {
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expectNotEqual(MemoryLayout<T>.size, MemoryLayout<T?>.size,
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"\(T.self) does not have extra inhabitant",
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file: file, line: line)
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}
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tests.test("types that have no extra inhabitant") {
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expectHasNoExtraInhabitant(SpareBitNoExtraInhabitant.self)
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expectHasNoExtraInhabitant(SpareBitNoExtraInhabitant2.self)
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expectHasNoExtraInhabitant(NoTagExtraInhabitants.self)
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}
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tests.test("types that have at least one extra inhabitant") {
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expectHasExtraInhabitant(SpareBitExtraInhabitants.self, nil: nil)
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expectHasExtraInhabitant(SpareBitSingleExtraInhabitant.self, nil: nil)
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expectHasExtraInhabitant(TwoTagExtraInhabitants.self, nil: nil)
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expectHasExtraInhabitant(ThreeTagExtraInhabitants.self, nil: nil)
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expectHasExtraInhabitant(DynamicExtraInhabitantsNever.self, nil: nil)
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expectHasExtraInhabitant(DynamicExtraInhabitantsZeroBytes.self, nil: nil)
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expectHasExtraInhabitant(DynamicExtraInhabitantsOneByte.self, nil: nil)
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expectHasExtraInhabitant(DynamicExtraInhabitantsTwoBytes.self, nil: nil)
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}
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tests.test("types that have at least two extra inhabitants") {
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expectHasAtLeastTwoExtraInhabitants(SpareBitExtraInhabitants.self, nil: nil, someNil: .some(nil))
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expectHasAtLeastTwoExtraInhabitants(TwoTagExtraInhabitants.self, nil: nil, someNil: .some(nil))
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expectHasAtLeastTwoExtraInhabitants(ThreeTagExtraInhabitants.self, nil: nil, someNil: .some(nil))
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expectHasAtLeastTwoExtraInhabitants(DynamicExtraInhabitantsNever.self, nil: nil, someNil: .some(nil))
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expectHasAtLeastTwoExtraInhabitants(DynamicExtraInhabitantsZeroBytes.self, nil: nil, someNil: .some(nil))
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expectHasAtLeastTwoExtraInhabitants(DynamicExtraInhabitantsOneByte.self, nil: nil, someNil: .some(nil))
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expectHasAtLeastTwoExtraInhabitants(DynamicExtraInhabitantsTwoBytes.self, nil: nil, someNil: .some(nil))
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}
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tests.test("types with more spare bits than used by tags") {
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expectHasAtLeastTwoExtraInhabitants(MoreSpareBitsThanTagsExtraInhabitants.self,
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nil: nil, someNil: .some(nil))
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for x in [MoreSpareBitsThanTagsExtraInhabitants.a(Builtin.zeroInitializer()),
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MoreSpareBitsThanTagsExtraInhabitants.b(Builtin.zeroInitializer()),
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MoreSpareBitsThanTagsExtraInhabitants.c(Builtin.zeroInitializer()),
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MoreSpareBitsThanTagsExtraInhabitants.d(Builtin.zeroInitializer())]{
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let opt = Optional(x)
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expectNotNil(opt)
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let opt2 = Optional(opt)
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expectNotNil(opt2)
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let opt3 = Optional(opt2)
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expectNotNil(opt3)
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let opt4 = Optional(opt3)
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expectNotNil(opt4)
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}
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for x in [MoreSpareBitsThanTagsExtraInhabitants.a(Builtin.zeroInitializer()),
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MoreSpareBitsThanTagsExtraInhabitants.b(Builtin.zeroInitializer()),
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MoreSpareBitsThanTagsExtraInhabitants.c(Builtin.zeroInitializer())]{
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let opt = Optional(x)
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expectNotNil(opt)
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let opt2 = Optional(opt)
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expectNotNil(opt2)
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let opt3 = Optional(opt2)
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expectNotNil(opt3)
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let opt4 = Optional(opt3)
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expectNotNil(opt4)
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let opt5 = Optional(opt4)
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expectNotNil(opt5)
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}
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}
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runAllTests()
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