Merge pull request swiftlang#9028 from practicalswift/reproducible-builds

Add reproducibility tests for -emit-assembly, -emit-ir and -emit-silgen [WIP]

Author: practicalswift

test/reproducible-builds/swiftc-emit-assembly.swift

@@ -0,0 +1,5 @@
+// RUN: rm -rf %t && mkdir -p %t
+// RUN: %target-build-swift -O -g -module-name foo -emit-assembly %s > %t/run-1.S
+// RUN: %target-build-swift -O -g -module-name foo -emit-assembly %s > %t/run-2.S
+// RUN: diff -u %t/run-1.S %t/run-2.S
+print("foo")

test/reproducible-builds/swiftc-emit-ir.swift

@@ -0,0 +1,5 @@
+// RUN: rm -rf %t && mkdir -p %t
+// RUN: %target-build-swift -O -g -module-name foo -emit-ir %s > %t/run-1.ir
+// RUN: %target-build-swift -O -g -module-name foo -emit-ir %s > %t/run-2.ir
+// RUN: diff -u %t/run-1.ir %t/run-2.ir
+print("foo")

test/reproducible-builds/swiftc-emit-silgen.swift

@@ -0,0 +1,5 @@
+// RUN: rm -rf %t && mkdir -p %t
+// RUN: %target-build-swift -O -g -module-name foo -emit-silgen %s > %t/run-1.silgen
+// RUN: %target-build-swift -O -g -module-name foo -emit-silgen %s > %t/run-2.silgen
+// RUN: diff -u %t/run-1.silgen %t/run-2.silgen
+print("foo")