[clang] [llvm] [HLSL] Adding HLSL `clip` function. (PR #114588)

[Farzon Lotfi via cfe-commits]

================
@@ -633,7 +633,8 @@ void RequirementHandler::initAvailableCapabilities(const SPIRVSubtarget &ST) {
   if (ST.isAtLeastSPIRVVer(VersionTuple(1, 6)))
     addAvailableCaps({Capability::DotProduct, Capability::DotProductInputAll,
                       Capability::DotProductInput4x8Bit,
-                      Capability::DotProductInput4x8BitPacked});
+                      Capability::DotProductInput4x8BitPacked,
+                      Capability::DemoteToHelperInvocation});
----------------
farzonl wrote:

this doesn't look right. Docs say this should be available in SPIRV 1.0 https://github.com/KhronosGroup/SPIRV-Registry/blob/main/extensions/EXT/SPV_EXT_demote_to_helper_invocation.asciidoc

https://github.com/llvm/llvm-project/pull/114588