================
@@ -0,0 +1,37 @@
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv-unknown-unknown %s -o - |
FileCheck %s
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-unknown-unknown %s -o -
-filetype=obj | spirv-val %}
----------------
s-perron wrote:
If you look at FindSMsb and FindUMsb in
https://registry.khronos.org/SPIR-V/specs/unified1/GLSL.std.450.html, it says:
> This instruction is currently limited to 32-bit width components.
For DXC, we opted to just not implement the 64-bit version. We can choose to do
something different in Clang. See
https://github.com/microsoft/DirectXShaderCompiler/issues/4702 for that
discussion.
This is an issue for 16-bit values as well.
https://github.com/llvm/llvm-project/pull/111082
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