llvm-project

38f3d0be - [MCP] Never eliminate frame-setup/destroy instructions (#186237)

[MCP] Never eliminate frame-setup/destroy instructions (#186237) Presumably targets only insert frame instructions which are significant, and there may be effects MCP doesn't model. Similar to reserved registers this is probably overly conservative, but as this causes no codegen change in any lit test I think it is benign. The motivation is just to clean up #183149 for AMDGPU, as we can spill to physical registers, and currently have to spill the EXEC mask purely to enable debug-info. Change-Id: I9ea4a09b34464c43322edd2900361bf635efd9f7