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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 --simplify-globals -all -S -o - | filecheck %s
;; A global that is written its initial value in all subsequent writes can
;; remove those writes.
(module
;; CHECK: (type $0 (func))
;; CHECK: (global $global-0 i32 (i32.const 0))
(global $global-0 (mut i32) (i32.const 0))
;; CHECK: (global $global-1 i32 (i32.const 1))
(global $global-1 (mut i32) (i32.const 1))
;; CHECK: (func $sets (type $0)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $sets
;; All these writes can be turned into drops.
(global.set $global-0 (i32.const 0))
(global.set $global-0 (i32.const 0))
(global.set $global-1 (i32.const 1))
(global.set $global-1 (i32.const 1))
)
;; CHECK: (func $gets (type $0)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $gets
;; Add gets to avoid other opts from removing the sets.
(drop (global.get $global-0))
(drop (global.get $global-1))
)
)
;; As above, but now we write other values.
(module
;; CHECK: (type $0 (func (param i32)))
;; CHECK: (type $1 (func))
;; CHECK: (global $global-0 (mut i32) (i32.const 0))
(global $global-0 (mut i32) (i32.const 0))
;; CHECK: (global $global-1 (mut i32) (i32.const 1))
(global $global-1 (mut i32) (i32.const 1))
;; CHECK: (func $sets (type $0) (param $unknown i32)
;; CHECK-NEXT: (global.set $global-0
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (global.set $global-0
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (global.set $global-1
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (global.set $global-1
;; CHECK-NEXT: (local.get $unknown)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $sets (param $unknown i32)
(global.set $global-0 (i32.const 0))
(global.set $global-0 (i32.const 1)) ;; a non-init value
(global.set $global-1 (i32.const 1))
(global.set $global-1 (local.get $unknown)) ;; a totally unknown value
)
;; CHECK: (func $gets (type $1)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (global.get $global-0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (global.get $global-1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $gets
(drop (global.get $global-0))
(drop (global.get $global-1))
)
)
;; Globals without constant initial values.
(module
;; An imported global.
;; CHECK: (type $0 (func (param i32)))
;; CHECK: (type $1 (func))
;; CHECK: (import "env" "import_global" (global $global-0 i32))
(import "env" "import_global" (global $global-0 i32))
;; A global that initializes with another global.
;; CHECK: (global $global-1 (mut i32) (global.get $global-0))
(global $global-1 (mut i32) (global.get $global-0))
;; CHECK: (func $sets (type $0) (param $unknown i32)
;; CHECK-NEXT: (global.set $global-1
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $sets (param $unknown i32)
(global.set $global-1 (i32.const 1))
)
;; CHECK: (func $gets (type $1)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (global.get $global-0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (global.get $global-1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $gets
;; Add gets to avoid other opts from removing the sets.
(drop (global.get $global-0))
(drop (global.get $global-1))
)
)
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