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;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
;; RUN: wasm-opt %s --simplify-locals --traps-never-happen -all -S -o - | filecheck %s --check-prefix TNH
;; RUN: wasm-opt %s --simplify-locals -all -S -o - | filecheck %s --check-prefix NO_TNH
(module
(memory 1 1)
;; TNH: (global $glob (mut i32) (i32.const 0))
;; NO_TNH: (global $glob (mut i32) (i32.const 0))
(global $glob (mut i32) (i32.const 0))
;; TNH: (func $optimize-past-global.set (type $0) (result i32)
;; TNH-NEXT: (local $temp i32)
;; TNH-NEXT: (nop)
;; TNH-NEXT: (global.set $glob
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: (i32.load
;; TNH-NEXT: (i32.const 0)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $optimize-past-global.set (type $0) (result i32)
;; NO_TNH-NEXT: (local $temp i32)
;; NO_TNH-NEXT: (local.set $temp
;; NO_TNH-NEXT: (i32.load
;; NO_TNH-NEXT: (i32.const 0)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (global.set $glob
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (local.get $temp)
;; NO_TNH-NEXT: )
(func $optimize-past-global.set (result i32)
(local $temp i32)
;; This load might trap, and so normally we can't move it past a global.set,
;; which has a global effect that could be noticed. However, in TNH mode we
;; can assume it doesn't trap and push it forward.
(local.set $temp
(i32.load
(i32.const 0)
)
)
(global.set $glob
(i32.const 1)
)
(local.get $temp)
)
;; TNH: (func $no-optimize-past-return (type $0) (result i32)
;; TNH-NEXT: (local $temp i32)
;; TNH-NEXT: (local.set $temp
;; TNH-NEXT: (i32.load
;; TNH-NEXT: (i32.const 0)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (if
;; TNH-NEXT: (i32.const 0)
;; TNH-NEXT: (then
;; TNH-NEXT: (return
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (local.get $temp)
;; TNH-NEXT: )
;; NO_TNH: (func $no-optimize-past-return (type $0) (result i32)
;; NO_TNH-NEXT: (local $temp i32)
;; NO_TNH-NEXT: (local.set $temp
;; NO_TNH-NEXT: (i32.load
;; NO_TNH-NEXT: (i32.const 0)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (if
;; NO_TNH-NEXT: (i32.const 0)
;; NO_TNH-NEXT: (then
;; NO_TNH-NEXT: (return
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (local.get $temp)
;; NO_TNH-NEXT: )
(func $no-optimize-past-return (result i32)
(local $temp i32)
;; As above, but now the thing in the middle may transfer control flow. We
;; can in principle optimize here (moving a trap to possibly not happen
;; later is fine, in TNH mode), but SimplifyLocals only works in a single
;; basic block so we don't atm.
(local.set $temp
(i32.load
(i32.const 0)
)
)
(if
(i32.const 0)
(then
(return
(i32.const 1)
)
)
)
(local.get $temp)
)
)
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