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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 -all -S -o - | filecheck %s
(module
;; CHECK: (tag $e-i32 (param i32))
(tag $e-i32 (param i32))
;; CHECK: (func $bar (type $1) (result i32)
;; CHECK-NEXT: (i32.const 3)
;; CHECK-NEXT: )
(func $bar (result i32) (i32.const 3))
;; CHECK: (func $call-cannot-be-sinked-into-try_table (type $2)
;; CHECK-NEXT: (local $0 i32)
;; CHECK-NEXT: (local.set $0
;; CHECK-NEXT: (call $bar)
;; CHECK-NEXT: )
;; CHECK-NEXT: (block $tryend
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (block $catch (result i32)
;; CHECK-NEXT: (try_table (catch $e-i32 $catch)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (br $tryend)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $call-cannot-be-sinked-into-try_table (local $0 i32)
(drop
;; This local.tee should NOT be sinked into 'try_table' below, because it
;; may throw
(local.tee $0 (call $bar))
)
(block $tryend
(drop
(block $catch (result i32)
(try_table (catch $e-i32 $catch)
(drop (local.get $0))
)
(br $tryend)
)
)
)
)
;; CHECK: (func $non-call-can-be-sinked-into-try_table (type $2)
;; CHECK-NEXT: (local $0 i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (block $tryend
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (block $catch (result i32)
;; CHECK-NEXT: (try_table (catch $e-i32 $catch)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (i32.const 3)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (br $tryend)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $non-call-can-be-sinked-into-try_table (local $0 i32)
(drop
;; This local.tee can be sinked into 'try_table' below, because it cannot
;; throw
(local.tee $0 (i32.const 3))
)
(block $tryend
(drop
(block $catch (result i32)
(try_table (catch $e-i32 $catch)
(drop (local.get $0))
)
(br $tryend)
)
)
)
)
;; CHECK: (func $return-call-can-be-sinked-into-try_table (type $1) (result i32)
;; CHECK-NEXT: (local $0 i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (block $tryend (result i32)
;; CHECK-NEXT: (try_table (result i32) (catch $e-i32 $tryend)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (if (result i32)
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (return_call $return-call-can-be-sinked-into-try_table)
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $return-call-can-be-sinked-into-try_table (result i32)
(local $0 i32)
(drop
;; This cannot throw either, so it can be sunk. Wrap the return_call in an
;; if so the whole expression does not return unconditionally.
(local.tee $0
(if (result i32)
(i32.const 0)
(then
(return_call $return-call-can-be-sinked-into-try_table)
)
(else
(i32.const 1)
)
)
)
)
(block $tryend (result i32)
(try_table (result i32) (catch $e-i32 $tryend)
(drop (local.get $0))
(i32.const 0)
)
)
)
;; CHECK: (func $equivalent-set-removal-call (type $0) (param $0 i32)
;; CHECK-NEXT: (local $1 i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (call $equivalent-set-removal-call
;; CHECK-NEXT: (i32.const 2)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $equivalent-set-removal-call (param $0 i32)
(local $1 i32)
(local.set $1 (local.get $0))
(drop (local.get $0))
(drop (local.get $1))
;; Even with EH enabled we can look past the call and optimize the final 1
;; to a 0, since they contain the same (and while the call might branch,
;; such a branch does not cause a problem here, as if we branch we just
;; don't reach the change later down).
(call $equivalent-set-removal-call
(i32.const 2)
)
(drop (local.get $0))
(drop (local.get $1))
)
;; CHECK: (func $equivalent-set-removal-if (type $3) (param $p i32) (param $0 i32)
;; CHECK-NEXT: (local $1 i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (local.set $1
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $equivalent-set-removal-if (param $p i32) (param $0 i32)
(local $1 i32)
(local.set $1 (local.get $0))
(drop (local.get $0))
;; This local.get of 1 can be of 0.
(drop (local.get $1))
(if
(local.get $p)
(then
(block
;; We also optimize in this block, which is adjacent to the code before
;; us. It is valid to optimize the 1 to a 0 here, as it is dominated by
;; the code earlier.
(drop (local.get $0))
(drop (local.get $1))
)
)
(else
(block
;; We could also optimize here, but atm just look at code adjacent to
;; its dominator. TODO
(drop (local.get $0))
(drop (local.get $1))
)
)
)
;; As in the else, this could be optimized. TODO
(drop (local.get $0))
(drop (local.get $1))
)
)
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