test/Driver/default-toolchain.c - llvm-project/clang - Git at Google

 // RUN: %clang -target i386-unknown-unknown -m64 -v 2> %t
 // RUN: grep 'Target: x86_64-unknown-unknown' %t

 // RUN: %clang -target x86_64-apple-macos11 -arch arm64 -v 2>&1 | FileCheck --check-prefix=ARM64 %s
 // ARM64: Target: arm64-apple-macos11
	// RUN: %clang -target i386-unknown-unknown -m64 -v 2> %t
	// RUN: grep 'Target: x86_64-unknown-unknown' %t

	// RUN: %clang -target x86_64-apple-macos11 -arch arm64 -v 2>&1 \| FileCheck --check-prefix=ARM64 %s
	// ARM64: Target: arm64-apple-macos11