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[Test] Add a potentially hanging test to prevent merging patches that hang it

This commit is contained in:
Max Kazantsev 2021-02-12 13:48:40 +07:00
parent 2968611fda
commit b32fa1751f
1 changed files with 53 additions and 0 deletions
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53
llvm/test/CodeGen/X86/2020_12_02_decrementing_loop.ll
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@ -173,3 +173,56 @@ exit: ; preds = %loop
failure: ; preds = %backedge failure: ; preds = %backedge
unreachable unreachable
} }
define void @test_04() {
; CHECK-LABEL: test_04:
; CHECK: ## %bb.0: ## %bb
; CHECK-NEXT: ud2
bb:
br label %bb1
bb1: ; preds = %bb10, %bb
%tmp = phi i64 [ 1, %bb ], [ %tmp2, %bb10 ]
%tmp2 = add nuw nsw i64 %tmp, 1
%tmp6 = bitcast i8 addrspace(1)* undef to i32 addrspace(1)*
br i1 undef, label %bb21, label %bb7
bb7: ; preds = %bb1
%tmp8 = add nsw i64 %tmp, -1
%tmp9 = getelementptr inbounds i32, i32 addrspace(1)* %tmp6, i64 %tmp8
store atomic i32 undef, i32 addrspace(1)* %tmp9 unordered, align 4
br label %bb11
bb10: ; preds = %bb16
br label %bb1
bb11: ; preds = %bb16, %bb7
switch i32 undef, label %bb19 [
i32 0, label %bb17
i32 1, label %bb16
i32 2, label %bb15
i32 3, label %bb14
i32 4, label %bb12
]
bb12: ; preds = %bb11
unreachable
bb14: ; preds = %bb11
unreachable
bb15: ; preds = %bb11
unreachable
bb16: ; preds = %bb11
br i1 undef, label %bb10, label %bb11
bb17: ; preds = %bb11
unreachable
bb19: ; preds = %bb11
unreachable
bb21: ; preds = %bb1
unreachable
}