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[JS IR] Don't concatenate string template segments with '' when possible

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If concatenating with an empty string is a sure no-op, just don't do it.
This commit is contained in:
Sergej Jaskiewicz
2021-11-18 20:13:57 +03:00
committed by Space
parent cad57e693f
commit 060074a9d6
3 changed files with 38 additions and 2 deletions
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compiler/testData/codegen/box/strings/interpolation.kt
Vendored
+25 -1
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@@ -1,9 +1,33 @@
// CHECK_STRING_LITERAL_COUNT: function=foo count=1
fun foo(x: Int) = "foo $x"
// CHECK_STRING_LITERAL_COUNT: function=bar count=2 IGNORED_BACKENDS=JS
fun bar(x: Int) = "$x bar"
// CHECK_STRING_LITERAL_COUNT: function=baz count=1
fun baz(x: Int) = "${x.toString()} baz"
// CHECK_STRING_LITERAL_COUNT: function=beer count=2 IGNORED_BACKENDS=JS
fun beer(x: Int?) = "$x beer"
// CHECK_STRING_LITERAL_COUNT: function=quux count=2 IGNORED_BACKENDS=JS
fun quux(x: Int?) = "${x?.toString()} quux"
// CHECK_STRING_LITERAL_COUNT: function=test count=2
fun test(p: String?): String {
return "${p ?: "Default"} test"
}
fun box(): String {
if (test(null) != "Default test") return "fail 1: ${test(null)}"
if (test("Good") != "Good test") return "fail 1: ${test("OK")}"
if (test("Good") != "Good test") return "fail 2: ${test("Good")}"
if (foo(3) != "foo 3") return "fail 3: ${foo(3)}"
if (bar(4) != "4 bar") return "fail 4: ${bar(4)}"
if (baz(5) != "5 baz") return "fail 5: ${baz(5)}"
if (beer(6) != "6 beer") return "fail 6: ${beer(6)}"
if (beer(null) != "null beer") return "fail 7: ${beer(null)}"
if (quux(8) != "8 quux") return "fail 8: ${quux(8)}"
if (quux(null) != "null quux") return "fail 9: ${quux(null)}"
return "OK"
}