JVM_IR: Optimize null checks.

Introduce lowering to remove null checks for primitive type
expressions and replace them with true/false. Side-effects
are preserved.

Generate ifnull/ifnonnull instructions for null checks instead
of materializing a null literal for an equality check.

This commit is contained in:

Mads Ager

2019-01-11 13:56:11 +01:00

committed by

Mikhael Bogdanov

parent f5312f42c5

commit 690b8e0ac9

35 changed files with 240 additions and 106 deletions

									
										compiler/testData/codegen/bytecodeText/nullCheckOptimization/ifUnitEqualsNull.kt
									
Vendored

		-1
	
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				@@ -1,4 +1,3 @@

				// IGNORE_BACKEND: JVM_IR

				fun test1() {

				    val a = Unit