| // Test which driver flags enable/disable Function Multiversioning on aarch64. | 
 |  | 
 | // FMV is enabled for non-android aarch64 targets: | 
 | // RUN: %clang --target=aarch64 --rtlib=compiler-rt -### -c %s 2>&1 | FileCheck -check-prefix=FMV-ENABLED %s | 
 | // RUN: %clang --target=aarch64-linux-gnu --rtlib=compiler-rt -### -c %s 2>&1 | FileCheck -check-prefix=FMV-ENABLED %s | 
 | // RUN: %clang --target=arm64-apple-ios --rtlib=compiler-rt -### -c %s 2>&1 | FileCheck -check-prefix=FMV-ENABLED %s | 
 | // RUN: %clang --target=arm64-apple-macosx --rtlib=compiler-rt -### -c %s 2>&1 | FileCheck -check-prefix=FMV-ENABLED %s | 
 |  | 
 | // android23 defaults to --rtlib=compiler-rt: | 
 | // RUN: %clang --target=aarch64-linux-android23 -### -c %s 2>&1 | FileCheck -check-prefix=FMV-ENABLED %s | 
 | // RUN: %clang --target=aarch64-linux-android23 --rtlib=compiler-rt  -### -c %s 2>&1 | FileCheck -check-prefix=FMV-ENABLED %s | 
 |  | 
 | // FMV is disabled without compiler-rt: | 
 | // RUN: %clang --rtlib=libgcc --target=aarch64 -### -c %s 2>&1 | FileCheck -check-prefix=FMV-DISABLED %s | 
 | // RUN: %clang --rtlib=libgcc --target=aarch64-linux-gnu -### -c %s 2>&1 | FileCheck -check-prefix=FMV-DISABLED %s | 
 |  | 
 | // Disabled for older android versions: | 
 | // RUN: %clang --rtlib=compiler-rt --target=aarch64-linux-android               -### -c %s 2>&1 | FileCheck -check-prefix=FMV-DISABLED %s | 
 | // RUN: %clang --rtlib=compiler-rt --target=aarch64-linux-android22             -### -c %s 2>&1 | FileCheck -check-prefix=FMV-DISABLED %s | 
 | // RUN: %clang --rtlib=compiler-rt --target=aarch64-linux-android22  -mno-fmv   -### -c %s 2>&1 | FileCheck -check-prefix=FMV-DISABLED %s | 
 |  | 
 | // Disabled explicitly: | 
 | // RUN: %clang --rtlib=compiler-rt --target=aarch64 -mno-fmv -### -c %s 2>&1 | FileCheck -check-prefix=FMV-DISABLED %s | 
 | // RUN: %clang --rtlib=compiler-rt --target=aarch64-linux-android23  -mno-fmv   -### -c %s 2>&1 | FileCheck -check-prefix=FMV-DISABLED %s | 
 |  | 
 | // FMV-ENABLED-NOT: "-target-feature" "-fmv" | 
 | // FMV-DISABLED: "-target-feature" "-fmv" |