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authorAlon Zakai <azakai@google.com>2021-09-16 13:07:31 -0700
committerGitHub <noreply@github.com>2021-09-16 13:07:31 -0700
commit8e8bce1b59a8d60a35e21798c6aec95e3dcade6b (patch)
tree395986ea97218394d91360b1657f5317c58d26bc /test/lit/passes/optimize-instructions-gc-iit.wast
parent433bffa7452906112f89278fcd5bad66bd473ae2 (diff)
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[Wasm GC] Optimize away ref.as_non_null going into local.set in TNH mode (#4157)
If we can remove such traps, we can remove ref.as_non_null if the local type is nullable anyhow. If we support non-nullable locals, however, then do not do this, as it could inhibit specializing the local type later. Do the same for tees which we had existing code for. Background: #4061 (comment)
Diffstat (limited to 'test/lit/passes/optimize-instructions-gc-iit.wast')
-rw-r--r--test/lit/passes/optimize-instructions-gc-iit.wast24
1 files changed, 24 insertions, 0 deletions
diff --git a/test/lit/passes/optimize-instructions-gc-iit.wast b/test/lit/passes/optimize-instructions-gc-iit.wast
index 41d4e69d5..b99042643 100644
--- a/test/lit/passes/optimize-instructions-gc-iit.wast
+++ b/test/lit/passes/optimize-instructions-gc-iit.wast
@@ -342,4 +342,28 @@
)
)
)
+
+ ;; CHECK: (func $set-of-as-non-null (param $x anyref)
+ ;; CHECK-NEXT: (local.set $x
+ ;; CHECK-NEXT: (local.get $x)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; NOMNL: (func $set-of-as-non-null (param $x anyref)
+ ;; NOMNL-NEXT: (local.set $x
+ ;; NOMNL-NEXT: (local.get $x)
+ ;; NOMNL-NEXT: )
+ ;; NOMNL-NEXT: )
+ ;; NOMNL-TNH: (func $set-of-as-non-null (param $x anyref)
+ ;; NOMNL-TNH-NEXT: (local.set $x
+ ;; NOMNL-TNH-NEXT: (local.get $x)
+ ;; NOMNL-TNH-NEXT: )
+ ;; NOMNL-TNH-NEXT: )
+ (func $set-of-as-non-null (param $x anyref)
+ ;; As we ignore such traps, we can remove the ref.as here.
+ (local.set $x
+ (ref.as_non_null
+ (local.get $x)
+ )
+ )
+ )
)