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04f82b424c
Modify IRGen to emit “anonymous” string constants with names of the form `@.str.<len>.<contents>` (with a special mangling for internal `\0` characters). This makes it much easier to write IRGen tests that check for the contents of strings, because matching the constant name also implies that the constant has the expected content.
27 lines
1.6 KiB
Swift
27 lines
1.6 KiB
Swift
// RUN: %target-swift-frontend -primary-file %s -emit-ir > %t.ir
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// RUN: %FileCheck %s --input-file=%t.ir
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// This test checks that `@.str` string constants have names accurately
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// reflecting their contents. Other tests rely on this behavior so they can
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// simply test the names of constants and assume that their values match.
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func strings() {
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// String literal containing only identifier-safe characters.
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blackHole("01234567890123456789")
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// CHECK-DAG: @.str.20.01234567890123456789 = private unnamed_addr constant [21 x i8] c"01234567890123456789\00"
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// String literal containing spaces and punctuation.
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blackHole("Hello, world! Padding past 16.")
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// CHECK-DAG: @".str.30.Hello, world! Padding past 16." = private unnamed_addr constant [31 x i8] c"Hello, world! Padding past 16.\00"
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// String literal containing non-ASCII characters.
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blackHole("🏳️⚧️👩❤️💋👩🥹")
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// CHECK-DAG: @".str.47.\F0\9F\8F\B3\EF\B8\8F\E2\80\8D\E2\9A\A7\EF\B8\8F\F0\9F\91\A9\E2\80\8D\E2\9D\A4\EF\B8\8F\E2\80\8D\F0\9F\92\8B\E2\80\8D\F0\9F\91\A9\F0\9F\A5\B9" = private unnamed_addr constant [48 x i8] c"\F0\9F\8F\B3\EF\B8\8F\E2\80\8D\E2\9A\A7\EF\B8\8F\F0\9F\91\A9\E2\80\8D\E2\9D\A4\EF\B8\8F\E2\80\8D\F0\9F\92\8B\E2\80\8D\F0\9F\91\A9\F0\9F\A5\B9\00"
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// String literal containing nul characters. These require special encoding.
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blackHole("\01\02\03\04\05\06\07\08")
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// CHECK-DAG: @.str.16._1_2_3_4_5_6_7_8.nul8.nul10.nul12.nul14.nul16.nul18.nul20.nul22 = private unnamed_addr constant [17 x i8] c"\001\002\003\004\005\006\007\008\00"
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}
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@inline(never) func blackHole(_: String) {}
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