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;; NOTE: Assertions have been generated by update_lit_checks.py --all-items and should not be edited.
;; RUN: foreach %s %t wasm-opt --memory-packing -all --zero-filled-memory -S -o - | filecheck %s
;; RUN: foreach %s %t wasm-opt --memory-packing -all --zero-filled-memory -tnh -S -o - | filecheck %s --check-prefix=TNH__
(module
;; We should not optimize out a segment that will trap, as that is an effect
;; we need to preserve (unless TrapsNeverHappen).
;; CHECK: (memory $memory 1 2)
;; TNH__: (memory $memory 1 2)
(memory $memory 1 2)
;; CHECK: (data $data (i32.const -1) "\00")
(data $data (i32.const -1) "\00")
)
(module
;; We should handle the possible overflow in adding the offset and size, and
;; see this might trap. To keep the segment trapping, we will emit a segment
;; with offset -1 of size 1 (which is the minimal thing we need for a trap).
;; CHECK: (memory $memory 1 2)
;; TNH__: (memory $memory 1 2)
(memory $memory 1 2)
;; CHECK: (data $data (i32.const -1) "\00")
(data $data (i32.const -2) "\00\00\00")
)
(module
;; This segment will almost trap, but not.
;; CHECK: (memory $memory 1 2)
;; TNH__: (memory $memory 1 2)
(memory $memory 1 2)
(data $data (i32.const 65535) "\00")
)
(module
;; This one is slightly larger, and will trap. We can at least shorten the
;; segment to only contain one byte, at the highest address the segment would
;; write to.
;; CHECK: (memory $memory 1 2)
;; TNH__: (memory $memory 1 2)
(memory $memory 1 2)
;; CHECK: (data $data (i32.const 65536) "\00")
(data $data (i32.const 65535) "\00\00")
)
(module
;; This one is slightly larger, but the offset is lower so it will not trap.
;; CHECK: (memory $memory 1 2)
;; TNH__: (memory $memory 1 2)
(memory $memory 1 2)
(data $data (i32.const 65534) "\00\00")
)
(module
;; This one's offset is just large enough to trap.
;; CHECK: (memory $memory 1 2)
;; TNH__: (memory $memory 1 2)
(memory $memory 1 2)
;; CHECK: (data $data (i32.const 65536) "\00")
(data $data (i32.const 65536) "\00")
)
(module
;; This offset is unknown, so assume the worst.
;; TODO: We could remove it in TNH mode
;; CHECK: (import "a" "b" (global $g i32))
;; TNH__: (import "a" "b" (global $g i32))
(import "a" "b" (global $g i32))
;; CHECK: (memory $memory 1 2)
;; TNH__: (memory $memory 1 2)
(memory $memory 1 2)
;; CHECK: (data $data (global.get $g) "\00")
;; TNH__: (data $data (global.get $g) "\00")
(data $data (global.get $g) "\00")
)
(module
;; Passive segments cannot trap during startup and are removable if they have
;; no uses, like here.
;; CHECK: (memory $memory 1 2)
;; TNH__: (memory $memory 1 2)
(memory $memory 1 2)
(data $data "\00\00\00")
)
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