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;; NOTE: Assertions have been generated by update_lit_checks.py --all-items and should not be edited.
;; NOTE: This test was ported using port_passes_tests_to_lit.py and could be cleaned up.
;; RUN: foreach %s %t wasm-opt --remove-unused-module-elements -all -S -o - | filecheck %s
;; RUN: foreach %s %t wasm-opt --remove-unused-module-elements -tnh -all -S -o - | filecheck %s --check-prefix=T_N_H
;; The segments here will trap during startup as they are out of bounds. We
;; can only remove such segments if we assume TrapsNeverHappen.
;;
;; The passive segments, however, can be removed: they do nothing during
;; startup, and have no uses.
(module
;; CHECK: (memory $0 16 17 shared)
(memory $0 16 17 shared)
;; CHECK: (data $0 (i32.const -1) "")
(data $0 (i32.const -1) "")
(data $1 "")
;; CHECK: (table $0 1 1 funcref)
(table $0 1 1 funcref)
;; CHECK: (elem $0 (i32.const -1))
(elem $0 (i32.const -1))
(elem $1 func)
)
;; Some segments can be removed: any segment that writes to address 131072 or
;; higher will trap, and must be kept (unless TNH). Only the $bad segment
;; should remain for that reason, however, it keeps the memory alive which
;; keeps the $ok* segments alive too.
(module
;; CHECK: (memory $0 2 2)
(memory $0 2 2)
;; CHECK: (data $ok1 (i32.const 0) "a")
(data $ok1 (i32.const 0) "a")
;; CHECK: (data $ok2 (i32.const 1000) "a")
(data $ok2 (i32.const 1000) "a")
;; CHECK: (data $ok3 (i32.const 131071) "a")
(data $ok3 (i32.const 131071) "a")
;; CHECK: (data $bad (i32.const 131071) "ab")
(data $bad (i32.const 131071) "ab")
)
;; The following modules have variations on the bad segment.
(module
;; CHECK: (memory $0 2 2)
(memory $0 2 2)
;; CHECK: (data $ok1 (i32.const 0) "a")
(data $ok1 (i32.const 0) "a")
;; CHECK: (data $ok2 (i32.const 1000) "a")
(data $ok2 (i32.const 1000) "a")
;; CHECK: (data $ok3 (i32.const 131071) "a")
(data $ok3 (i32.const 131071) "a")
;; CHECK: (data $bad (i32.const 131072) "a")
(data $bad (i32.const 131072) "a")
)
(module
;; CHECK: (memory $0 2 2)
(memory $0 2 2)
;; CHECK: (data $ok1 (i32.const 0) "a")
(data $ok1 (i32.const 0) "a")
;; CHECK: (data $ok2 (i32.const 1000) "a")
(data $ok2 (i32.const 1000) "a")
;; CHECK: (data $ok3 (i32.const 131071) "a")
(data $ok3 (i32.const 131071) "a")
;; CHECK: (data $bad (i32.const 9999999) "a")
(data $bad (i32.const 9999999) "a")
)
(module
;; CHECK: (memory $0 2 2)
(memory $0 2 2)
;; CHECK: (data $ok1 (i32.const 0) "a")
(data $ok1 (i32.const 0) "a")
;; CHECK: (data $ok2 (i32.const 1000) "a")
(data $ok2 (i32.const 1000) "a")
;; CHECK: (data $ok3 (i32.const 131071) "a")
(data $ok3 (i32.const 131071) "a")
;; CHECK: (data $bad (i32.const -2) "a")
(data $bad (i32.const 4294967294) "a")
)
(module
;; CHECK: (memory $0 2 2)
(memory $0 2 2)
;; CHECK: (data $ok1 (i32.const 0) "a")
(data $ok1 (i32.const 0) "a")
;; CHECK: (data $ok2 (i32.const 1000) "a")
(data $ok2 (i32.const 1000) "a")
;; CHECK: (data $ok3 (i32.const 131071) "a")
(data $ok3 (i32.const 131071) "a")
;; CHECK: (data $bad (i32.const -6) "abcdefghijklmnop_overflow")
(data $bad (i32.const 4294967290) "abcdefghijklmnop_overflow")
)
(module
;; CHECK: (memory $0 2 2)
(memory $0 2 2)
;; CHECK: (data $ok1 (i32.const 0) "a")
(data $ok1 (i32.const 0) "a")
;; CHECK: (data $ok2 (i32.const 1000) "a")
(data $ok2 (i32.const 1000) "a")
;; CHECK: (data $ok3 (i32.const 131071) "a")
(data $ok3 (i32.const 131071) "a")
;; CHECK: (data $bad (i32.const -2) "a")
(data $bad (i32.const -2) "a")
)
;; An imported global is an unknown offset, so it might trap.
(module
;; CHECK: (import "a" "b" (global $imported i32))
(import "a" "b" (global $imported i32))
;; CHECK: (memory $0 2 2)
(memory $0 2 2)
;; CHECK: (data $ok1 (i32.const 0) "a")
(data $ok1 (i32.const 0) "a")
;; CHECK: (data $ok2 (i32.const 1000) "a")
(data $ok2 (i32.const 1000) "a")
;; CHECK: (data $ok3 (i32.const 131071) "a")
(data $ok3 (i32.const 131071) "a")
;; CHECK: (data $bad (global.get $imported) "a")
(data $bad (global.get $imported) "a")
)
;; Finally, a module with no bad segments. We can remove all the contents.
(module
(memory $0 2 2)
(data $ok1 (i32.const 0) "a")
(data $ok2 (i32.const 1000) "a")
(data $ok3 (i32.const 131071) "a")
)
;; Similar testing for element segments. One bad segment keeps it all alive
;; here.
(module
(table 10 10 funcref)
;; CHECK: (type $0 (func))
;; CHECK: (table $0 10 10 funcref)
;; CHECK: (elem $ok1 (i32.const 0) $func)
(elem $ok1 (i32.const 0) $func)
;; CHECK: (elem $ok2 (i32.const 8) $func $func)
(elem $ok2 (i32.const 8) $func $func)
;; CHECK: (elem $ok3 (i32.const 9) $func)
(elem $ok3 (i32.const 9) $func)
;; CHECK: (elem $bad (i32.const 10) $func)
(elem $bad (i32.const 10) $func)
;; CHECK: (func $func (type $0)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; T_N_H: (type $0 (func))
;; T_N_H: (func $func (type $0)
;; T_N_H-NEXT: (nop)
;; T_N_H-NEXT: )
(func $func)
)
;; A different bad segment.
(module
(table 10 10 funcref)
;; CHECK: (type $0 (func))
;; CHECK: (table $0 10 10 funcref)
;; CHECK: (elem $ok1 (i32.const 0) $func)
(elem $ok1 (i32.const 0) $func)
;; CHECK: (elem $ok2 (i32.const 8) $func $func)
(elem $ok2 (i32.const 8) $func $func)
;; CHECK: (elem $ok3 (i32.const 9) $func)
(elem $ok3 (i32.const 9) $func)
;; CHECK: (elem $bad (i32.const 9) $func $func)
(elem $bad (i32.const 9) $func $func)
;; CHECK: (func $func (type $0)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; T_N_H: (type $0 (func))
;; T_N_H: (func $func (type $0)
;; T_N_H-NEXT: (nop)
;; T_N_H-NEXT: )
(func $func)
)
;; No bad segments: all element segments vanish. TODO: the function could too
(module
(table 10 10 funcref)
(elem $ok1 (i32.const 0) $func)
(elem $ok2 (i32.const 8) $func $func)
(elem $ok3 (i32.const 9) $func)
;; CHECK: (type $0 (func))
;; CHECK: (func $func (type $0)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; T_N_H: (type $0 (func))
;; T_N_H: (func $func (type $0)
;; T_N_H-NEXT: (nop)
;; T_N_H-NEXT: )
(func $func)
)
;; Multiple memories. One can be removed, the other remains due to a trapping
;; segment.
(module
;; CHECK: (memory $small 1 1)
(memory $small 1 1)
(memory $big 2 2)
;; CHECK: (data $a (i32.const 100000) "ab")
(data $a (memory $small) (i32.const 100000) "ab") ;; fits in $big; not $small
(data $b (memory $big) (i32.const 100000) "cd")
)
;; Reverse order of memories.
(module
(memory $big 2 2)
;; CHECK: (memory $small 1 1)
(memory $small 1 1)
;; CHECK: (data $a (i32.const 100000) "ab")
(data $a (memory $small) (i32.const 100000) "ab") ;; fits in $big; not $small
(data $b (memory $big) (i32.const 100000) "cd")
)
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