| ; RUN: llc -march=amdgcn -verify-machineinstrs -verify-coalescing < %s |
| |
| ; The original and requires materializing a 64-bit immediate for |
| ; s_and_b64. This is split into 2 x v_and_i32, part of the immediate |
| ; is folded through the reg_sequence into the v_and_i32 operand, and |
| ; only half of the result is ever used. |
| ; |
| ; During live interval construction, the first sub register def is |
| ; incorrectly marked as dead. |
| |
| declare i32 @llvm.amdgcn.workitem.id.x() #1 |
| |
| define amdgpu_kernel void @dead_def_subregister(i32 addrspace(1)* noalias %out, i64 addrspace(1)* noalias %in) #0 { |
| %tid = call i32 @llvm.amdgcn.workitem.id.x() #1 |
| %in.gep = getelementptr i64, i64 addrspace(1)* %in, i32 %tid |
| %val = load i64, i64 addrspace(1)* %in.gep |
| |
| %lshr = shl i64 %val, 24 |
| %and1 = and i64 %lshr, 2190433320969 ; (255 << 33) | 9 |
| %vec = bitcast i64 %and1 to <2 x i32> |
| %elt1 = extractelement <2 x i32> %vec, i32 1 |
| |
| store i32 %elt1, i32 addrspace(1)* %out |
| ret void |
| } |
| |
| attributes #0 = { nounwind } |
| attributes #1 = { nounwind readnone } |
