REQUIRES: darwin

No dead_strip. Unused code is not removed.
RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t
RUN: nm %t | grep UnusedFunctionShouldBeRemovedByLinker | count 1
RUN: %run %t -runs=0 2>&1 | FileCheck %s

With dead_strip. Unused code is not removed.
RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t -ffunction-sections -Wl,-dead_strip
RUN: nm %t | grep UnusedFunctionShouldBeRemovedByLinker | count 1
RUN: %run %t -runs=0 2>&1 | FileCheck %s

With dead_strip, with trace-pc. Unused code is removed.
RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t -ffunction-sections -fsanitize-coverage=0 -fsanitize-coverage=trace-pc -Wl,-dead_strip
RUN: nm %t | not grep UnusedFunctionShouldBeRemovedByLinker
RUN: %run %t -runs=0 2>&1 | FileCheck %s

With dead_strip, with pc-table. Unused code is not removed.
RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t -ffunction-sections -fsanitize-coverage=0 -fsanitize-coverage=trace-pc-guard,pc-table -Wl,-dead_strip
RUN: nm %t | grep UnusedFunctionShouldBeRemovedByLinker | count 1
RUN: %run %t -runs=0 2>&1 | FileCheck %s

CHECK-NOT: ERROR: The size of coverage PC tables does not match