AMDGPU: Remove max_scratch_backing_memory_byte_size from kernel header

1. Remove max_scratch_backing_memory_byte_size from kernel header
2. Make it a reserved field
3. Ignore it while parsing assembly for backwards compatibility
4. Bump up minor version of kernel header

Differential Revision: https://reviews.llvm.org/D45452

llvm-svn: 329620

1 files changed, 2 insertions, 8 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDKernelCodeT.h b/llvm/lib/Target/AMDGPU/AMDKernelCodeT.h
index 5d243e949fd..df70a9f8bba 100644
--- a/llvm/lib/Target/AMDGPU/AMDKernelCodeT.h
+++ b/llvm/lib/Target/AMDGPU/AMDKernelCodeT.h
@@ -551,14 +551,8 @@ typedef struct amd_kernel_code_s {
   int64_t kernel_code_prefetch_byte_offset;
   uint64_t kernel_code_prefetch_byte_size;
 
-  /// Number of bytes of scratch backing memory required for full
-  /// occupancy of target chip. This takes into account the number of
-  /// bytes of scratch per work-item, the wavefront size, the maximum
-  /// number of wavefronts per CU, and the number of CUs. This is an
-  /// upper limit on scratch. If the grid being dispatched is small it
-  /// may only need less than this. If the kernel uses no scratch, or
-  /// the Finalizer has not computed this value, it must be 0.
-  uint64_t max_scratch_backing_memory_byte_size;
+  /// Reserved. Must be 0.
+  uint64_t reserved0;
 
   /// Shader program settings for CS. Contains COMPUTE_PGM_RSRC1 and
   /// COMPUTE_PGM_RSRC2 registers.