[clang] [llvm] [Hexagon] ELF attributes for Hexagon (PR #85359)

[Fangrui Song via cfe-commits]

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@@ -0,0 +1,20 @@
+/// Enabled by default for assembly
+// RUN: %clang -target hexagon-unknown-elf -### %s 2>&1 \
+// RUN:    | FileCheck %s -check-prefix CHECK-ENABLED
+
+/// Can be forced on or off for assembly.
+// RUN: %clang -target hexagon-unknown-elf -### %s 2>&1 -mno-default-build-attributes \
+// RUN:    | FileCheck %s -check-prefix CHECK-DISABLED
+// RUN: %clang -target hexagon-unknown-elf -### %s 2>&1 -mdefault-build-attributes \
+// RUN:    | FileCheck %s -check-prefix CHECK-ENABLED
+
+/// Option ignored C/C++ (since we always emit hardware and ABI build attributes
+/// during codegen).
+// RUN: %clang -target hexagon-unknown-elf -### -x c %s -mdefault-build-attributes 2>&1 \
+// RUN:    | FileCheck %s -check-prefix CHECK-DISABLED
+// RUN: %clang -target hexagon-unknown-elf -### -x c++ %s -mdefault-build-attributes 2>&1 \
+// RUN:    | FileCheck %s -check-prefix CHECK-DISABLED
+
+// CHECK-DISABLED-NOT: "-hexagon-add-build-attributes"
+// CHECK-ENABLED: "-hexagon-add-build-attributes"
+// expected-warning {{argument unused during compilation: '-mno-default-build-attributes'}}
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MaskRay wrote:

`expected` directive is for `-verify`. Driver tests use `-###` instead of cc1 `-verify`

https://github.com/llvm/llvm-project/pull/85359