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Diffstat (limited to 'test/lit/ctor-eval/partial-global.wat')
-rw-r--r-- | test/lit/ctor-eval/partial-global.wat | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/test/lit/ctor-eval/partial-global.wat b/test/lit/ctor-eval/partial-global.wat new file mode 100644 index 000000000..fdd196d02 --- /dev/null +++ b/test/lit/ctor-eval/partial-global.wat @@ -0,0 +1,39 @@ +;; NOTE: Assertions have been generated by update_lit_checks.py --all-items and should not be edited. +;; RUN: wasm-ctor-eval %s --ctors=test --kept-exports=test --quiet -all -S -o - | filecheck %s + +(module + ;; CHECK: (type $none_=>_none (func)) + + ;; CHECK: (global $global (mut i32) (i32.const 0)) + (global $global (mut i32) (i32.const 0)) + + (func $test (export "test") + ;; The nop can be evalled away, but not the loop. We should not apply any + ;; partial results from the loop - in particular, the global must remain at + ;; 0. That is, the global.set of 999 below must not be applied to the global. + ;; + ;; (It is true that in this simple module it would be ok to set 999 to the + ;; global, but if the global were exported for example then that would not + ;; be the case, nor would it be the case if the code did $global = $global + 1 + ;; or such. That is, since the global.set is not evalled away, its effects + ;; must not be applied; we do both atomically or neither, so that the + ;; global.set's execution only happens once.) + + (nop) + (loop + (global.set $global + (i32.const 999) + ) + (unreachable) + ) + ) +) + +;; CHECK: (export "test" (func $test_1)) + +;; CHECK: (func $test_1 (type $none_=>_none) +;; CHECK-NEXT: (global.set $global +;; CHECK-NEXT: (i32.const 999) +;; CHECK-NEXT: ) +;; CHECK-NEXT: (unreachable) +;; CHECK-NEXT: ) |