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; RUN: llc -mtriple=amdgcn -verify-machineinstrs -o /dev/null < %s
; RUN: llc -mtriple=amdgcn -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs -o /dev/null < %s
; The register coalescer introduces a verifier error which later
; results in a crash during scheduling.
declare i32 @llvm.amdgcn.workitem.id.x() #0
define amdgpu_kernel void @reg_coalescer_breaks_dead(ptr addrspace(1) nocapture readonly %arg, i32 %arg1, i32 %arg2, i32 %arg3, i1 %c0) #1 {
bb:
%id.x = call i32 @llvm.amdgcn.workitem.id.x()
%cmp0 = icmp eq i32 %id.x, 0
br i1 %cmp0, label %bb3, label %bb4
bb3: ; preds = %bb
%tmp = ashr exact i32 undef, 8
br label %bb6
bb4: ; preds = %bb6, %bb
%tmp5 = phi <2 x i32> [ zeroinitializer, %bb ], [ %tmp13, %bb6 ]
br i1 %c0, label %bb15, label %bb16
bb6: ; preds = %bb6, %bb3
%tmp7 = phi <2 x i32> [ zeroinitializer, %bb3 ], [ %tmp13, %bb6 ]
%tmp8 = add nsw i32 0, %arg1
%tmp9 = add nsw i32 %tmp8, 0
%tmp10 = sext i32 %tmp9 to i64
%tmp11 = getelementptr inbounds <2 x i32>, ptr addrspace(1) %arg, i64 %tmp10
%tmp12 = load <2 x i32>, ptr addrspace(1) %tmp11, align 8
%tmp13 = add <2 x i32> %tmp12, %tmp7
%tmp14 = icmp slt i32 undef, %arg2
br i1 %tmp14, label %bb6, label %bb4
bb15: ; preds = %bb4
store <2 x i32> %tmp5, ptr addrspace(3) undef, align 8
br label %bb16
bb16: ; preds = %bb15, %bb4
unreachable
}
attributes #0 = { nounwind readnone }
attributes #1 = { nounwind }
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