[clang] [Clang][Basic] Enable `__has_feature(cfi)` (PR #151348)

[via cfe-commits]

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@@ -0,0 +1,31 @@
+// RUN: %clang_cc1 -E -fsanitize=cfi-cast-strict -o - %s | FileCheck --check-prefix=CHECK-CFISAN %s
+// RUN: %clang_cc1 -E -fsanitize=cfi-derived-cast -o - %s | FileCheck --check-prefix=CHECK-CFISAN %s
+// RUN: %clang_cc1 -E -fsanitize=cfi-icall -o - %s | FileCheck --check-prefix=CHECK-CFISAN %s
+// RUN: %clang_cc1 -E -fsanitize=cfi-mfcall -o - %s | FileCheck --check-prefix=CHECK-CFISAN %s
+// RUN: %clang_cc1 -E -fsanitize=cfi-unrelated-cast -o - %s | FileCheck --check-prefix=CHECK-CFISAN %s
+// RUN: %clang_cc1 -E -fsanitize=cfi-nvcall -o - %s | FileCheck --check-prefix=CHECK-CFISAN %s
+// RUN: %clang_cc1 -E -fsanitize=cfi-vcall -o - %s | FileCheck --check-prefix=CHECK-CFISAN %s
+
+// RUN: %clang_cc1 -E -fsanitize=kcfi -o - %s | FileCheck --check-prefix=CHECK-CFISAN %s
+
+// RUN: %clang -E --target=x86_64-linux-gnu -fvisibility=hidden -fno-sanitize-ignorelist -fsanitize=cfi -flto -c %s -o - | FileCheck %s --check-prefix=CHECK-CFISAN
+// RUN: %clang -E --target=x86_64-linux-gnu -fvisibility=hidden -fno-sanitize-ignorelist -fsanitize=cfi -fsanitize-cfi-cross-dso -flto -c %s -o - | FileCheck %s --check-prefix=CHECK-CFISAN
+
+// Disable CFI sanitizers.
+// RUN: %clang -E --target=x86_64-linux-gnu -fvisibility=hidden -fno-sanitize=cfi -flto -c %s -o - | FileCheck %s --check-prefix=CHECK-NO-CFISAN
+
+// Disable some but not all CFI schemes.
+// RUN: %clang -E --target=x86_64-linux-gnu -fvisibility=hidden -fno-sanitize-ignorelist -fsanitize=cfi -fno-sanitize-cfi-cross-dso -fno-sanitize=cfi-nvcall,cfi-vcall,cfi-mfcall,cfi-icall -flto -c %s -o - | FileCheck %s --check-prefix=CHECK-CFISAN
+
+// Disable all CFI schemes. This essentially disables CFI sanitizers.
+// RUN: %clang -E --target=x86_64-linux-gnu -fvisibility=hidden -fsanitize=cfi -fno-sanitize-cfi-cross-dso -fno-sanitize=cfi-nvcall,cfi-vcall,cfi-mfcall,cfi-icall,cfi-cast-strict,cfi-derived-cast,cfi-unrelated-cast -flto -c %s -o - | FileCheck %s --check-prefix=CHECK-NO-CFISAN
----------------
PiJoules wrote:

If you're testing for x86_64-linux-gnu only, you'll probably want `// REQUIRES: x86-registered-target` also

https://github.com/llvm/llvm-project/pull/151348