Add intrinsics for compile-time computing trimMargin/trimIndent

These only apply when the receiver can be resolved to a constant and the margin prefix, if specified, is also a constant.

compiler/testData/codegen/bytecodeText/intrinsicsTrim/trimIndentNegative.kt

@@ -0,0 +1,20 @@
+fun notConstant(arg: String): String {
+    return arg.trimIndent()
+}
+
+fun interpolated(arg: Int):String {
+    return """
+        Hello,
+        $arg
+    """.trimIndent()
+}
+
+fun notInvoked():String {
+    return """
+        Hello,
+        World
+    """
+}
+
+// 1 LDC "\\n        Hello,\\n        World\\n    "
+// 2 INVOKESTATIC kotlin/text/StringsKt.trimIndent

compiler/testData/codegen/bytecodeText/intrinsicsTrim/trimIndentPositive.kt

@@ -0,0 +1,22 @@
+// IGNORE_BACKEND: JVM_IR
+
+fun constant(): String {
+    return """
+        Hello,
+        World
+    """.trimIndent()
+}
+
+private const val HAS_INDENT = """Hello,
+        World"""
+fun interpolatedUsingConstant(): String {
+    return """
+        Hello,
+        $HAS_INDENT
+        World
+    """.trimIndent()
+}
+
+// 1 LDC "Hello,\\nWorld"
+// 1 LDC "Hello,\\nHello,\\nWorld\\nWorld"
+// 0 INVOKESTATIC kotlin/text/StringsKt.trimIndent

compiler/testData/codegen/bytecodeText/intrinsicsTrim/trimMarginNegative.kt

@@ -0,0 +1,33 @@
+fun notConstant(arg: String): String {
+    return arg.trimMargin()
+}
+
+fun notConstantCustomPrefix(arg: String): String {
+    return arg.trimMargin("###")
+}
+
+fun interpolated(arg: Int):String {
+    return """
+        |Hello,
+        |$arg
+    """.trimMargin()
+}
+
+fun notInvoked():String {
+    return """
+        |Hello,
+        |World
+    """
+}
+
+fun constantWithNonConstantCustomPrefix(arg: String): String {
+    return """
+        |Hello,
+        |World
+    """.trimMargin(arg)
+}
+
+// 1 LDC "\\n        \|Hello,\\n        \|"
+// 1 LDC "\\n    "
+// 2 LDC "\\n        \|Hello,\\n        \|World\\n    "
+// 4 INVOKESTATIC kotlin/text/StringsKt.trimMargin

compiler/testData/codegen/bytecodeText/intrinsicsTrim/trimMarginPositive.kt

@@ -0,0 +1,38 @@
+// IGNORE_BACKEND: JVM_IR
+
+fun constant(): String {
+    return """
+        |Hello,
+        |World
+    """.trimMargin()
+}
+
+private const val HAS_MARGIN = """Hello,
+        |World"""
+fun interpolatedUsingConstant(): String {
+    return """
+        |Hello,
+        |$HAS_MARGIN
+        |World
+    """.trimMargin()
+}
+
+fun constantCustomPrefix(): String {
+    return """
+        ###Hello,
+        ###World
+    """.trimMargin(marginPrefix = "###")
+}
+
+private const val OCTOTHORPE = '#'
+fun constantCustomPrefixInterpolatedUsingConstant(): String {
+    return """
+        #@#Hello,
+        #@#World
+    """.trimMargin(marginPrefix = "$OCTOTHORPE@$OCTOTHORPE")
+}
+
+// 3 LDC "Hello,\\nWorld"
+// 1 LDC "Hello,\\nHello,\\nWorld\\nWorld"
+// 0 LDC "###"
+// 0 INVOKESTATIC kotlin/text/StringsKt.trimMargin