Use XFAIL, not UNSUPPORTED

Author: bogner

test/Feature/CBuffer/arrays-16bit.test

@@ -60,7 +60,7 @@ DescriptorSets:
 # UNSUPPORTED: Vulkan
 
 # https://github.com/llvm/llvm-project/issues/138996
-# UNSUPPORTED: Clang
+# XFAIL: Clang
 
 # RUN: split-file %s %t
 # RUN: %dxc_target -enable-16bit-types -T cs_6_5 -Fo %t.o %t/source.hlsl

test/Feature/CBuffer/structs.test

@@ -99,7 +99,7 @@ DescriptorSets:
 
 +# Clang trips on 2-element vectors in structs:
 +# https://github.com/llvm/llvm-project/issues/123968
-+# UNSUPPORTED: Clang
++# XFAIL: Clang
 
 # RUN: split-file %s %t
 # RUN: %dxc_target -T cs_6_5 -Fo %t.o %t/source.hlsl

test/Feature/CBuffer/vectors-64bit.test

@@ -65,7 +65,7 @@ DescriptorSets:
 
 # Clang trips on 3-element vectors in structs:
 # https://github.com/llvm/llvm-project/issues/123968
-# UNSUPPORTED: Clang
+# XFAIL: Clang
 
 # RUN: split-file %s %t
 # RUN: %dxc_target -T cs_6_5 -Fo %t.o %t/source.hlsl

test/Feature/CBuffer/vectors.test

@@ -65,7 +65,7 @@ DescriptorSets:
 
 # Clang trips on 3-element vectors in structs:
 # https://github.com/llvm/llvm-project/issues/123968
-# UNSUPPORTED: Clang
+# XFAIL: Clang
 
 # RUN: split-file %s %t
 # RUN: %dxc_target -T cs_6_5 -Fo %t.o %t/source.hlsl