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[JVM IR] Use append(Char) for 1-length string literals in string

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templates and plus concatenations.

This is slightly more efficient and mirrors the behavior of the non-IR
backend for templates (but not for plus concatenations).

#KT-36638 Fixed
This commit is contained in:
Mark Punzalan
2020-02-12 11:26:59 -08:00
committed by Dmitry Petrov
parent bd9877cc62
commit 4234fa79c0
9 changed files with 78 additions and 17 deletions
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6
compiler/testData/codegen/bytecodeText/stringOperations/useAppendCharForOneCharStringInTemplate.kt vendored Normal file
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@@ -0,0 +1,6 @@
fun test(s: String, i: Int) = "${"x"}${s}${" "}${i}${"y"}"
// 1 INVOKEVIRTUAL java/lang/StringBuilder.append \(Ljava/lang/String;\)Ljava/lang/StringBuilder
// 1 INVOKEVIRTUAL java/lang/StringBuilder.append \(I\)Ljava/lang/StringBuilder
// 3 INVOKEVIRTUAL java/lang/StringBuilder.append \(C\)Ljava/lang/StringBuilder
// 5 INVOKEVIRTUAL java/lang/StringBuilder.append