[clang] [HIP][SPIRV] Enable the SPIRV backend instead of the translator through an experimental flag. (PR #162282)

[Manuel Carrasco via cfe-commits]

Juan Manuel Martinez =?utf-8?q?Caamaño?= <juamarti at amd.com>,Manuel
 Carrasco <Manuel.Carrasco at amd.com>,Manuel Carrasco <Manuel.Carrasco at amd.com>,Manuel
 Carrasco <Manuel.Carrasco at amd.com>,Manuel Carrasco <Manuel.Carrasco at amd.com>,Manuel
 Carrasco <Manuel.Carrasco at amd.com>,Manuel Carrasco <Manuel.Carrasco at amd.com>,Manuel
 Carrasco <Manuel.Carrasco at amd.com>,Manuel Carrasco <Manuel.Carrasco at amd.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/162282 at github.com>


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@@ -995,7 +995,7 @@ inferOffloadToolchains(Compilation &C, Action::OffloadKind Kind) {
 
     StringRef Triple;
     if (ID == OffloadArch::AMDGCNSPIRV)
-      Triple = "spirv64-amd-amdhsa";
+      Triple = "spirv64v1.6-amd-amdhsa";
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mgcarrasco wrote:

@shiltian thanks for all the feedback. I refactored the code so we have `getSpirvBackendTriple()` which returns the hardcoded triple for the two uses we have (here and in the [Linker](https://github.com/llvm/llvm-project/pull/162282/files#diff-242dcb66348f860d8610bab6cf633f3bc158620853e0987ec2f1b47ee982719cR189)). We could also write a function that returns the harcoded version, similar to `getSpirvBackendTriple()`. Let me know what you think.

https://github.com/llvm/llvm-project/pull/162282