[clang] [llvm] [SPIRV] Add size optimisation for AMDGCN flavoured SPIR-V (PR #228188)

[Alex Voicu via cfe-commits]

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@@ -1580,6 +1580,13 @@ def no_use_spirv_backend
       Group<hip_Group>,
       Flags<[HelpHidden]>,
       HelpText<"Do not use the SPIRV backend for compilation ">;
+def fenable_spirv_size_optimization
+    : Flag<["-"], "fenable-spirv-size-optimization">,
+      MarshallingInfoFlag<CodeGenOpts<"AMDGCNSPIRVSizeOptimization">>,
+      Visibility<[ClangOption, CC1Option]>,
+      Group<hip_Group>,
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AlexVlx wrote:

Fixed, modulo test, I had forgotten to add the Clang bit.

https://github.com/llvm/llvm-project/pull/228188