forked from OSchip/llvm-project
39 lines
1.8 KiB
LLVM
39 lines
1.8 KiB
LLVM
; RUN: opt < %s -rewrite-statepoints-for-gc -spp-print-base-pointers -S 2>&1 | FileCheck %s
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; RUN: opt < %s -passes=rewrite-statepoints-for-gc -spp-print-base-pointers -S 2>&1 | FileCheck %s
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; CHECK: derived %next_element_ptr base %array_obj
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define i32 @null_in_array(i64 addrspace(1)* %array_obj) gc "statepoint-example" {
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entry:
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%array_len_pointer.i64 = getelementptr i64, i64 addrspace(1)* %array_obj, i32 1
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%array_len_pointer.i32 = bitcast i64 addrspace(1)* %array_len_pointer.i64 to i32 addrspace(1)*
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%array_len = load i32, i32 addrspace(1)* %array_len_pointer.i32
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%array_elems = bitcast i32 addrspace(1)* %array_len_pointer.i32 to i64 addrspace(1)* addrspace(1)*
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br label %loop_check
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loop_check: ; preds = %loop_back, %entry
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%index = phi i32 [ 0, %entry ], [ %next_index, %loop_back ]
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%current_element_ptr = phi i64 addrspace(1)* addrspace(1)* [ %array_elems, %entry ], [ %next_element_ptr, %loop_back ]
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%index_lt = icmp ult i32 %index, %array_len
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br i1 %index_lt, label %check_for_null, label %not_found
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check_for_null: ; preds = %loop_check
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%current_element = load i64 addrspace(1)*, i64 addrspace(1)* addrspace(1)* %current_element_ptr
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%is_null = icmp eq i64 addrspace(1)* %current_element, null
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br i1 %is_null, label %found, label %loop_back
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loop_back: ; preds = %check_for_null
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%next_element_ptr = getelementptr i64 addrspace(1)*, i64 addrspace(1)* addrspace(1)* %current_element_ptr, i32 1
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%next_index = add i32 %index, 1
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call void @do_safepoint() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ]
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br label %loop_check
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not_found: ; preds = %loop_check
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ret i32 -1
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found: ; preds = %check_for_null
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ret i32 %index
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}
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declare void @do_safepoint()
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