llvm-project

69abfd31 - [AMDGPU] Allow casts between the Global and Constant Addr Spaces in isValidAddrSpaceCast (#112493)

[AMDGPU] Allow casts between the Global and Constant Addr Spaces in isValidAddrSpaceCast (#112493) So far, isValidAddrSpaceCast only allows casts to the flat address space and between the constant(32) address spaces. It does not allow casting between the global and constant address spaces, even though they alias. That affects, e.g., the lowering of memmoves from the constant to the global address space in LowerMemIntrinsics, since that requires aliasing address spaces to be castable. This patch relaxes isValidAddrSpaceCast and allows such casts. It also includes a memmove test that would crash with the previous implementation because the memmove IR lowering would not be applicable for the move from constant AS to global AS.