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/// For -fprofile-instr-generate and -fprofile-arcs, increment counters atomically
/// if -fprofile-update={atomic,prefer-atomic} is specified.
// RUN: %clang -### %s -c -fprofile-update=atomic 2>&1 | FileCheck %s
// RUN: %clang -### %s -c -fprofile-update=prefer-atomic 2>&1 | FileCheck %s
// CHECK: "-fprofile-update=atomic"
// RUN: %clang -### %s -c -fprofile-update=atomic -fprofile-update=single 2>&1 | FileCheck %s --check-prefix=SINGLE
// SINGLE-NOT: "-fprofile-update=atomic"
// RUN: not %clang %s -c -fprofile-update=unknown 2>&1 | FileCheck %s --check-prefix=ERROR
// ERROR: error: unsupported argument 'unknown' to option '-fprofile-update='
// AIX specific tests
// RUN: %clang -### %s --target=powerpc-unknown-aix -fprofile-generate -fprofile-update=atomic 2>&1 | FileCheck %s --check-prefix=AIX
// RUN: %clang -### %s --target=powerpc-unknown-aix -fprofile-generate -fprofile-update=prefer-atomic 2>&1 | FileCheck %s --check-prefix=AIX
// RUN: %clang -### %s --target=powerpc-unknown-aix -fprofile-generate 2>&1 | FileCheck %s --check-prefix=AIX-NOATOMIC
// RUN: %clang -### %s --target=powerpc-unknown-aix -fprofile-generate -fprofile-update=single 2>&1 | FileCheck %s --check-prefix=AIX-NOATOMIC
// AIX: "-latomic"
// AIX-NOATOMIC-NOT: "-latomic"
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