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| author | Alon Zakai <azakai@google.com> | 2021-09-16 13:07:31 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-09-16 13:07:31 -0700 |
| commit | 8e8bce1b59a8d60a35e21798c6aec95e3dcade6b (patch) | |
| tree | 395986ea97218394d91360b1657f5317c58d26bc /test/lit/passes/optimize-instructions-gc-tnh-nn.wast | |
| parent | 433bffa7452906112f89278fcd5bad66bd473ae2 (diff) | |
| download | binaryen-8e8bce1b59a8d60a35e21798c6aec95e3dcade6b.tar.gz binaryen-8e8bce1b59a8d60a35e21798c6aec95e3dcade6b.tar.bz2 binaryen-8e8bce1b59a8d60a35e21798c6aec95e3dcade6b.zip | |
[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-tnh-nn.wast')
| -rw-r--r-- | test/lit/passes/optimize-instructions-gc-tnh-nn.wast | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/test/lit/passes/optimize-instructions-gc-tnh-nn.wast b/test/lit/passes/optimize-instructions-gc-tnh-nn.wast new file mode 100644 index 000000000..e0a580ae1 --- /dev/null +++ b/test/lit/passes/optimize-instructions-gc-tnh-nn.wast @@ -0,0 +1,40 @@ +;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited. +;; RUN: wasm-opt %s --optimize-instructions --traps-never-happen --enable-gc-nn-locals -all -S -o - \ +;; RUN: | filecheck %s + +(module + ;; CHECK: (func $set-of-as-non-null + ;; CHECK-NEXT: (local $x anyref) + ;; CHECK-NEXT: (local.set $x + ;; CHECK-NEXT: (ref.as_non_null + ;; CHECK-NEXT: (local.get $x) + ;; CHECK-NEXT: ) + ;; CHECK-NEXT: ) + ;; CHECK-NEXT: (drop + ;; CHECK-NEXT: (local.tee $x + ;; CHECK-NEXT: (ref.as_non_null + ;; CHECK-NEXT: (local.get $x) + ;; CHECK-NEXT: ) + ;; CHECK-NEXT: ) + ;; CHECK-NEXT: ) + ;; CHECK-NEXT: ) + (func $set-of-as-non-null + (local $x anyref) + ;; As we ignore such traps, we can in principle remove the ref.as here. + ;; However, as we allow non-nullable locals, we should not do that - if we + ;; did it it might prevent specializing the local type later. + (local.set $x + (ref.as_non_null + (local.get $x) + ) + ) + ;; The same for a tee. + (drop + (local.tee $x + (ref.as_non_null + (local.get $x) + ) + ) + ) + ) +) |