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We need to store a value greater than or equal to the number of LDS bytes allocated by the shader in the m0 register in order for LDS instructions to work correctly. We always initialize m0 at the beginning of a shader, but this register is also used for indirect addressing offsets, so we need to re-initialize it any time we use indirect addressing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211107 91177308-0d34-0410-b5e6-96231b3b80d8
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