================
@@ -243,6 +243,7 @@ ENUM_LANGOPT(HLSLVersion, HLSLLangStd, 16, HLSL_Unset,
NotCompatible, "HLSL Vers
LANGOPT(HLSLStrictAvailability, 1, 0, NotCompatible,
"Strict availability diagnostic mode for HLSL built-in functions.")
LANGOPT(HLSLSpvUseUnknownImageFormat, 1, 0, NotCompatible, "For storage images
and texel buffers, sets the default format to 'Unknown' when not specified via
the `vk::image_format` attribute. If this option is not used, the format is
inferred from the resource's data type.")
+LANGOPT(HLSLSpvEnableMaximalReconvergence, 1, 0, NotCompatible, "Enables
maximal reconvergence for SPIR-V codegen. This ensures that all control flow
merges at the nearest possible merge point as defined by the Vulkan spec.")
----------------
s-perron wrote:
Is "nearest possible merge point" the wording in the Vk/spir-v spec? I believe
the issue was that without this exe mode, implementations can have the threads
reconverge before the merge block. With this extension the threads are
guaranteed to not reconverge until the merge block.
https://github.com/llvm/llvm-project/pull/163474
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